datetime escapes the sandbox. The Windows build is all set. I leave it

to others to argue about how to build it on other platforms (on Windows
it's in its own DLL).

1 files changed, 2128 insertions, 0 deletions

diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
new file mode 100644
index 0000000..058fb90
--- /dev/null
+++ b/Lib/test/test_datetime.py
@@ -0,0 +1,2128 @@
+"""Test date/time type."""
+
+import sys
+import unittest
+
+from test import test_support
+
+from datetime import MINYEAR, MAXYEAR
+from datetime import timedelta
+from datetime import tzinfo
+from datetime import time, timetz
+from datetime import date, datetime, datetimetz
+
+#############################################################################
+# module tests
+
+class TestModule(unittest.TestCase):
+
+    def test_constants(self):
+        import datetime
+        self.assertEqual(datetime.MINYEAR, 1)
+        self.assertEqual(datetime.MAXYEAR, 9999)
+
+#############################################################################
+# tzinfo tests
+
+class FixedOffset(tzinfo):
+    def __init__(self, offset, name, dstoffset=42):
+        self.__offset = offset
+        self.__name = name
+        self.__dstoffset = dstoffset
+    def __repr__(self):
+        return self.__name.lower()
+    def utcoffset(self, dt):
+        return self.__offset
+    def tzname(self, dt):
+        return self.__name
+    def dst(self, dt):
+        return self.__dstoffset
+
+class TestTZInfo(unittest.TestCase):
+
+    def test_non_abstractness(self):
+        # In order to allow subclasses to get pickled, the C implementation
+        # wasn't able to get away with having __init__ raise
+        # NotImplementedError.
+        useless = tzinfo()
+        dt = datetime.max
+        self.assertRaises(NotImplementedError, useless.tzname, dt)
+        self.assertRaises(NotImplementedError, useless.utcoffset, dt)
+        self.assertRaises(NotImplementedError, useless.dst, dt)
+
+    def test_subclass_must_override(self):
+        class NotEnough(tzinfo):
+            def __init__(self, offset, name):
+                self.__offset = offset
+                self.__name = name
+        self.failUnless(issubclass(NotEnough, tzinfo))
+        ne = NotEnough(3, "NotByALongShot")
+        self.failUnless(isinstance(ne, tzinfo))
+
+        dt = datetime.now()
+        self.assertRaises(NotImplementedError, ne.tzname, dt)
+        self.assertRaises(NotImplementedError, ne.utcoffset, dt)
+        self.assertRaises(NotImplementedError, ne.dst, dt)
+
+    def test_normal(self):
+        fo = FixedOffset(3, "Three")
+        self.failUnless(isinstance(fo, tzinfo))
+        for dt in datetime.now(), None:
+            self.assertEqual(fo.utcoffset(dt), 3)
+            self.assertEqual(fo.tzname(dt), "Three")
+            self.assertEqual(fo.dst(dt), 42)
+
+    def test_pickling_base(self):
+        import pickle, cPickle
+
+        # There's no point to pickling tzinfo objects on their own (they
+        # carry no data), but they need to be picklable anyway else
+        # concrete subclasses can't be pickled.
+        orig = tzinfo.__new__(tzinfo)
+        self.failUnless(type(orig) is tzinfo)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.failUnless(type(derived) is tzinfo)
+
+    def test_pickling_subclass(self):
+        import pickle, cPickle
+
+        # Make sure we can pickle/unpickle an instance of a subclass.
+        orig = FixedOffset(-300, 'cookie')
+        self.failUnless(isinstance(orig, tzinfo))
+        self.failUnless(type(orig) is FixedOffset)
+        self.assertEqual(orig.utcoffset(None), -300)
+        self.assertEqual(orig.tzname(None), 'cookie')
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.failUnless(isinstance(derived, tzinfo))
+                self.failUnless(type(derived) is FixedOffset)
+                self.assertEqual(derived.utcoffset(None), -300)
+                self.assertEqual(derived.tzname(None), 'cookie')
+
+#############################################################################
+# timedelta tests
+
+class TestTimeDelta(unittest.TestCase):
+
+    def test_constructor(self):
+        eq = self.assertEqual
+        td = timedelta
+
+        # Check keyword args to constructor
+        eq(td(), td(weeks=0, days=0, hours=0, minutes=0, seconds=0,
+                    milliseconds=0, microseconds=0))
+        eq(td(1), td(days=1))
+        eq(td(0, 1), td(seconds=1))
+        eq(td(0, 0, 1), td(microseconds=1))
+        eq(td(weeks=1), td(days=7))
+        eq(td(days=1), td(hours=24))
+        eq(td(hours=1), td(minutes=60))
+        eq(td(minutes=1), td(seconds=60))
+        eq(td(seconds=1), td(milliseconds=1000))
+        eq(td(milliseconds=1), td(microseconds=1000))
+
+        # Check float args to constructor
+        eq(td(weeks=1.0/7), td(days=1))
+        eq(td(days=1.0/24), td(hours=1))
+        eq(td(hours=1.0/60), td(minutes=1))
+        eq(td(minutes=1.0/60), td(seconds=1))
+        eq(td(seconds=0.001), td(milliseconds=1))
+        eq(td(milliseconds=0.001), td(microseconds=1))
+
+    def test_computations(self):
+        eq = self.assertEqual
+        td = timedelta
+
+        a = td(7) # One week
+        b = td(0, 60) # One minute
+        c = td(0, 0, 1000) # One millisecond
+        eq(a+b+c, td(7, 60, 1000))
+        eq(a-b, td(6, 24*3600 - 60))
+        eq(-a, td(-7))
+        eq(+a, td(7))
+        eq(-b, td(-1, 24*3600 - 60))
+        eq(-c, td(-1, 24*3600 - 1, 999000))
+        eq(abs(a), a)
+        eq(abs(-a), a)
+        eq(td(6, 24*3600), a)
+        eq(td(0, 0, 60*1000000), b)
+        eq(a*10, td(70))
+        eq(a*10, 10*a)
+        eq(a*10L, 10*a)
+        eq(b*10, td(0, 600))
+        eq(10*b, td(0, 600))
+        eq(b*10L, td(0, 600))
+        eq(c*10, td(0, 0, 10000))
+        eq(10*c, td(0, 0, 10000))
+        eq(c*10L, td(0, 0, 10000))
+        eq(a*-1, -a)
+        eq(b*-2, -b-b)
+        eq(c*-2, -c+-c)
+        eq(b*(60*24), (b*60)*24)
+        eq(b*(60*24), (60*b)*24)
+        eq(c*1000, td(0, 1))
+        eq(1000*c, td(0, 1))
+        eq(a//7, td(1))
+        eq(b//10, td(0, 6))
+        eq(c//1000, td(0, 0, 1))
+        eq(a//10, td(0, 7*24*360))
+        eq(a//3600000, td(0, 0, 7*24*1000))
+
+    def test_disallowed_computations(self):
+        a = timedelta(42)
+
+        # Add/sub ints, longs, floats should be illegal
+        for i in 1, 1L, 1.0:
+            self.assertRaises(TypeError, lambda: a+i)
+            self.assertRaises(TypeError, lambda: a-i)
+            self.assertRaises(TypeError, lambda: i+a)
+            self.assertRaises(TypeError, lambda: i-a)
+
+        # Mul/div by float isn't supported.
+        x = 2.3
+        self.assertRaises(TypeError, lambda: a*x)
+        self.assertRaises(TypeError, lambda: x*a)
+        self.assertRaises(TypeError, lambda: a/x)
+        self.assertRaises(TypeError, lambda: x/a)
+        self.assertRaises(TypeError, lambda: a // x)
+        self.assertRaises(TypeError, lambda: x // a)
+
+        # Divison of int by timedelta doesn't make sense.
+        # Division by zero doesn't make sense.
+        for zero in 0, 0L:
+            self.assertRaises(TypeError, lambda: zero // a)
+            self.assertRaises(ZeroDivisionError, lambda: a // zero)
+
+    def test_basic_attributes(self):
+        days, seconds, us = 1, 7, 31
+        td = timedelta(days, seconds, us)
+        self.assertEqual(td.days, days)
+        self.assertEqual(td.seconds, seconds)
+        self.assertEqual(td.microseconds, us)
+
+    def test_carries(self):
+        t1 = timedelta(days=100,
+                       weeks=-7,
+                       hours=-24*(100-49),
+                       minutes=-3,
+                       seconds=12,
+                       microseconds=(3*60 - 12) * 1e6 + 1)
+        t2 = timedelta(microseconds=1)
+        self.assertEqual(t1, t2)
+
+    def test_hash_equality(self):
+        t1 = timedelta(days=100,
+                       weeks=-7,
+                       hours=-24*(100-49),
+                       minutes=-3,
+                       seconds=12,
+                       microseconds=(3*60 - 12) * 1000000)
+        t2 = timedelta()
+        self.assertEqual(hash(t1), hash(t2))
+
+        t1 += timedelta(weeks=7)
+        t2 += timedelta(days=7*7)
+        self.assertEqual(t1, t2)
+        self.assertEqual(hash(t1), hash(t2))
+
+        d = {t1: 1}
+        d[t2] = 2
+        self.assertEqual(len(d), 1)
+        self.assertEqual(d[t1], 2)
+
+    def test_pickling(self):
+        import pickle, cPickle
+        args = 12, 34, 56
+        orig = timedelta(*args)
+        state = orig.__getstate__()
+        self.assertEqual(args, state)
+        derived = timedelta()
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+
+    def test_compare(self):
+        t1 = timedelta(2, 3, 4)
+        t2 = timedelta(2, 3, 4)
+        self.failUnless(t1 == t2)
+        self.failUnless(t1 <= t2)
+        self.failUnless(t1 >= t2)
+        self.failUnless(not t1 != t2)
+        self.failUnless(not t1 < t2)
+        self.failUnless(not t1 > t2)
+        self.assertEqual(cmp(t1, t2), 0)
+        self.assertEqual(cmp(t2, t1), 0)
+
+        for args in (3, 3, 3), (2, 4, 4), (2, 3, 5):
+            t2 = timedelta(*args)   # this is larger than t1
+            self.failUnless(t1 < t2)
+            self.failUnless(t2 > t1)
+            self.failUnless(t1 <= t2)
+            self.failUnless(t2 >= t1)
+            self.failUnless(t1 != t2)
+            self.failUnless(t2 != t1)
+            self.failUnless(not t1 == t2)
+            self.failUnless(not t2 == t1)
+            self.failUnless(not t1 > t2)
+            self.failUnless(not t2 < t1)
+            self.failUnless(not t1 >= t2)
+            self.failUnless(not t2 <= t1)
+            self.assertEqual(cmp(t1, t2), -1)
+            self.assertEqual(cmp(t2, t1), 1)
+
+        for badarg in 10, 10L, 34.5, "abc", {}, [], ():
+            self.assertRaises(TypeError, lambda: t1 == badarg)
+            self.assertRaises(TypeError, lambda: t1 != badarg)
+            self.assertRaises(TypeError, lambda: t1 <= badarg)
+            self.assertRaises(TypeError, lambda: t1 < badarg)
+            self.assertRaises(TypeError, lambda: t1 > badarg)
+            self.assertRaises(TypeError, lambda: t1 >= badarg)
+            self.assertRaises(TypeError, lambda: badarg == t1)
+            self.assertRaises(TypeError, lambda: badarg != t1)
+            self.assertRaises(TypeError, lambda: badarg <= t1)
+            self.assertRaises(TypeError, lambda: badarg < t1)
+            self.assertRaises(TypeError, lambda: badarg > t1)
+            self.assertRaises(TypeError, lambda: badarg >= t1)
+
+    def test_str(self):
+        td = timedelta
+        eq = self.assertEqual
+
+        eq(str(td(1)), "1 day, 0:00:00")
+        eq(str(td(-1)), "-1 day, 0:00:00")
+        eq(str(td(2)), "2 days, 0:00:00")
+        eq(str(td(-2)), "-2 days, 0:00:00")
+
+        eq(str(td(hours=12, minutes=58, seconds=59)), "12:58:59")
+        eq(str(td(hours=2, minutes=3, seconds=4)), "2:03:04")
+        eq(str(td(weeks=-30, hours=23, minutes=12, seconds=34)),
+           "-210 days, 23:12:34")
+
+        eq(str(td(milliseconds=1)), "0:00:00.001000")
+        eq(str(td(microseconds=3)), "0:00:00.000003")
+
+        eq(str(td(days=999999999, hours=23, minutes=59, seconds=59,
+                   microseconds=999999)),
+           "999999999 days, 23:59:59.999999")
+
+    def test_roundtrip(self):
+        for td in (timedelta(days=999999999, hours=23, minutes=59,
+                             seconds=59, microseconds=999999),
+                   timedelta(days=-999999999),
+                   timedelta(days=1, seconds=2, microseconds=3)):
+
+            # Verify td -> string -> td identity.
+            s = repr(td)
+            self.failUnless(s.startswith('datetime.'))
+            s = s[9:]
+            td2 = eval(s)
+            self.assertEqual(td, td2)
+
+            # Verify identity via reconstructing from pieces.
+            td2 = timedelta(td.days, td.seconds, td.microseconds)
+            self.assertEqual(td, td2)
+
+    def test_resolution_info(self):
+        self.assert_(isinstance(timedelta.min, timedelta))
+        self.assert_(isinstance(timedelta.max, timedelta))
+        self.assert_(isinstance(timedelta.resolution, timedelta))
+        self.assert_(timedelta.max > timedelta.min)
+        self.assertEqual(timedelta.min, timedelta(-999999999))
+        self.assertEqual(timedelta.max, timedelta(999999999, 24*3600-1, 1e6-1))
+        self.assertEqual(timedelta.resolution, timedelta(0, 0, 1))
+
+    def test_overflow(self):
+        tiny = timedelta.resolution
+
+        td = timedelta.min + tiny
+        td -= tiny  # no problem
+        self.assertRaises(OverflowError, td.__sub__, tiny)
+        self.assertRaises(OverflowError, td.__add__, -tiny)
+
+        td = timedelta.max - tiny
+        td += tiny  # no problem
+        self.assertRaises(OverflowError, td.__add__, tiny)
+        self.assertRaises(OverflowError, td.__sub__, -tiny)
+
+        self.assertRaises(OverflowError, lambda: -timedelta.max)
+
+    def test_microsecond_rounding(self):
+        td = timedelta
+        eq = self.assertEqual
+
+        # Single-field rounding.
+        eq(td(milliseconds=0.4/1000), td(0))    # rounds to 0
+        eq(td(milliseconds=-0.4/1000), td(0))    # rounds to 0
+        eq(td(milliseconds=0.6/1000), td(microseconds=1))
+        eq(td(milliseconds=-0.6/1000), td(microseconds=-1))
+
+        # Rounding due to contributions from more than one field.
+        us_per_hour = 3600e6
+        us_per_day = us_per_hour * 24
+        eq(td(days=.4/us_per_day), td(0))
+        eq(td(hours=.2/us_per_hour), td(0))
+        eq(td(days=.4/us_per_day, hours=.2/us_per_hour), td(microseconds=1))
+
+        eq(td(days=-.4/us_per_day), td(0))
+        eq(td(hours=-.2/us_per_hour), td(0))
+        eq(td(days=-.4/us_per_day, hours=-.2/us_per_hour), td(microseconds=-1))
+
+    def test_massive_normalization(self):
+        td = timedelta(microseconds=-1)
+        self.assertEqual((td.days, td.seconds, td.microseconds),
+                         (-1, 24*3600-1, 999999))
+
+    def test_bool(self):
+        self.failUnless(timedelta(1))
+        self.failUnless(timedelta(0, 1))
+        self.failUnless(timedelta(0, 0, 1))
+        self.failUnless(timedelta(microseconds=1))
+        self.failUnless(not timedelta(0))
+
+#############################################################################
+# date tests
+
+class TestDateOnly(unittest.TestCase):
+    # Tests here won't pass if also run on datetime objects, so don't
+    # subclass this to test datetimes too.
+
+    def test_delta_non_days_ignored(self):
+        dt = date(2000, 1, 2)
+        delta = timedelta(days=1, hours=2, minutes=3, seconds=4,
+                          microseconds=5)
+        days = timedelta(delta.days)
+        self.assertEqual(days, timedelta(1))
+
+        dt2 = dt + delta
+        self.assertEqual(dt2, dt + days)
+
+        dt2 = delta + dt
+        self.assertEqual(dt2, dt + days)
+
+        dt2 = dt - delta
+        self.assertEqual(dt2, dt - days)
+
+        delta = -delta
+        days = timedelta(delta.days)
+        self.assertEqual(days, timedelta(-2))
+
+        dt2 = dt + delta
+        self.assertEqual(dt2, dt + days)
+
+        dt2 = delta + dt
+        self.assertEqual(dt2, dt + days)
+
+        dt2 = dt - delta
+        self.assertEqual(dt2, dt - days)
+
+class TestDate(unittest.TestCase):
+    # Tests here should pass for both dates and datetimes, except for a
+    # few tests that TestDateTime overrides.
+
+    theclass = date
+
+    def test_basic_attributes(self):
+        dt = self.theclass(2002, 3, 1)
+        self.assertEqual(dt.year, 2002)
+        self.assertEqual(dt.month, 3)
+        self.assertEqual(dt.day, 1)
+
+    def test_roundtrip(self):
+        for dt in (self.theclass(1, 2, 3),
+                   self.theclass.today()):
+            # Verify dt -> string -> date identity.
+            s = repr(dt)
+            self.failUnless(s.startswith('datetime.'))
+            s = s[9:]
+            dt2 = eval(s)
+            self.assertEqual(dt, dt2)
+
+            # Verify identity via reconstructing from pieces.
+            dt2 = self.theclass(dt.year, dt.month, dt.day)
+            self.assertEqual(dt, dt2)
+
+    def test_ordinal_conversions(self):
+        # Check some fixed values.
+        for y, m, d, n in [(1, 1, 1, 1),      # calendar origin
+                           (1, 12, 31, 365),
+                           (2, 1, 1, 366),
+                           # first example from "Calendrical Calculations"
+                           (1945, 11, 12, 710347)]:
+            d = self.theclass(y, m, d)
+            self.assertEqual(n, d.toordinal())
+            fromord = self.theclass.fromordinal(n)
+            self.assertEqual(d, fromord)
+            if hasattr(fromord, "hour"):
+                # if we're checking something fancier than a date, verify
+                # the extra fields have been zeroed out
+                self.assertEqual(fromord.hour, 0)
+                self.assertEqual(fromord.minute, 0)
+                self.assertEqual(fromord.second, 0)
+                self.assertEqual(fromord.microsecond, 0)
+
+        # Check first and last days of year spottily across the whole
+        # range of years supported.
+        for year in xrange(MINYEAR, MAXYEAR+1, 7):
+            # Verify (year, 1, 1) -> ordinal -> y, m, d is identity.
+            d = self.theclass(year, 1, 1)
+            n = d.toordinal()
+            d2 = self.theclass.fromordinal(n)
+            self.assertEqual(d, d2)
+            # Verify that moving back a day gets to the end of year-1.
+            if year > 1:
+                d = self.theclass.fromordinal(n-1)
+                d2 = self.theclass(year-1, 12, 31)
+                self.assertEqual(d, d2)
+                self.assertEqual(d2.toordinal(), n-1)
+
+        # Test every day in a leap-year and a non-leap year.
+        dim = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+        for year, isleap in (2000, True), (2002, False):
+            n = self.theclass(year, 1, 1).toordinal()
+            for month, maxday in zip(range(1, 13), dim):
+                if month == 2 and isleap:
+                    maxday += 1
+                for day in range(1, maxday+1):
+                    d = self.theclass(year, month, day)
+                    self.assertEqual(d.toordinal(), n)
+                    self.assertEqual(d, self.theclass.fromordinal(n))
+                    n += 1
+
+    def test_extreme_ordinals(self):
+        a = self.theclass.min
+        a = self.theclass(a.year, a.month, a.day)  # get rid of time parts
+        aord = a.toordinal()
+        b = a.fromordinal(aord)
+        self.assertEqual(a, b)
+
+        self.assertRaises(ValueError, lambda: a.fromordinal(aord - 1))
+
+        b = a + timedelta(days=1)
+        self.assertEqual(b.toordinal(), aord + 1)
+        self.assertEqual(b, self.theclass.fromordinal(aord + 1))
+
+        a = self.theclass.max
+        a = self.theclass(a.year, a.month, a.day)  # get rid of time parts
+        aord = a.toordinal()
+        b = a.fromordinal(aord)
+        self.assertEqual(a, b)
+
+        self.assertRaises(ValueError, lambda: a.fromordinal(aord + 1))
+
+        b = a - timedelta(days=1)
+        self.assertEqual(b.toordinal(), aord - 1)
+        self.assertEqual(b, self.theclass.fromordinal(aord - 1))
+
+    def test_bad_constructor_arguments(self):
+        # bad years
+        self.theclass(MINYEAR, 1, 1)  # no exception
+        self.theclass(MAXYEAR, 1, 1)  # no exception
+        self.assertRaises(ValueError, self.theclass, MINYEAR-1, 1, 1)
+        self.assertRaises(ValueError, self.theclass, MAXYEAR+1, 1, 1)
+        # bad months
+        self.theclass(2000, 1, 1)    # no exception
+        self.theclass(2000, 12, 1)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 0, 1)
+        self.assertRaises(ValueError, self.theclass, 2000, 13, 1)
+        # bad days
+        self.theclass(2000, 2, 29)   # no exception
+        self.theclass(2004, 2, 29)   # no exception
+        self.theclass(2400, 2, 29)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 2, 30)
+        self.assertRaises(ValueError, self.theclass, 2001, 2, 29)
+        self.assertRaises(ValueError, self.theclass, 2100, 2, 29)
+        self.assertRaises(ValueError, self.theclass, 1900, 2, 29)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 0)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 32)
+
+    def test_hash_equality(self):
+        d = self.theclass(2000, 12, 31)
+        # same thing
+        e = self.theclass(2000, 12, 31)
+        self.assertEqual(d, e)
+        self.assertEqual(hash(d), hash(e))
+
+        dic = {d: 1}
+        dic[e] = 2
+        self.assertEqual(len(dic), 1)
+        self.assertEqual(dic[d], 2)
+        self.assertEqual(dic[e], 2)
+
+        d = self.theclass(2001,  1,  1)
+        # same thing
+        e = self.theclass(2001,  1,  1)
+        self.assertEqual(d, e)
+        self.assertEqual(hash(d), hash(e))
+
+        dic = {d: 1}
+        dic[e] = 2
+        self.assertEqual(len(dic), 1)
+        self.assertEqual(dic[d], 2)
+        self.assertEqual(dic[e], 2)
+
+    def test_computations(self):
+        a = self.theclass(2002, 1, 31)
+        b = self.theclass(1956, 1, 31)
+
+        diff = a-b
+        self.assertEqual(diff.days, 46*365 + len(range(1956, 2002, 4)))
+        self.assertEqual(diff.seconds, 0)
+        self.assertEqual(diff.microseconds, 0)
+
+        day = timedelta(1)
+        week = timedelta(7)
+        a = self.theclass(2002, 3, 2)
+        self.assertEqual(a + day, self.theclass(2002, 3, 3))
+        self.assertEqual(day + a, self.theclass(2002, 3, 3))
+        self.assertEqual(a - day, self.theclass(2002, 3, 1))
+        self.assertEqual(-day + a, self.theclass(2002, 3, 1))
+        self.assertEqual(a + week, self.theclass(2002, 3, 9))
+        self.assertEqual(a - week, self.theclass(2002, 2, 23))
+        self.assertEqual(a + 52*week, self.theclass(2003, 3, 1))
+        self.assertEqual(a - 52*week, self.theclass(2001, 3, 3))
+        self.assertEqual((a + week) - a, week)
+        self.assertEqual((a + day) - a, day)
+        self.assertEqual((a - week) - a, -week)
+        self.assertEqual((a - day) - a, -day)
+        self.assertEqual(a - (a + week), -week)
+        self.assertEqual(a - (a + day), -day)
+        self.assertEqual(a - (a - week), week)
+        self.assertEqual(a - (a - day), day)
+
+        # Add/sub ints, longs, floats should be illegal
+        for i in 1, 1L, 1.0:
+            self.assertRaises(TypeError, lambda: a+i)
+            self.assertRaises(TypeError, lambda: a-i)
+            self.assertRaises(TypeError, lambda: i+a)
+            self.assertRaises(TypeError, lambda: i-a)
+
+        # delta - date is senseless.
+        self.assertRaises(TypeError, lambda: day - a)
+        # mixing date and (delta or date) via * or // is senseless
+        self.assertRaises(TypeError, lambda: day * a)
+        self.assertRaises(TypeError, lambda: a * day)
+        self.assertRaises(TypeError, lambda: day // a)
+        self.assertRaises(TypeError, lambda: a // day)
+        self.assertRaises(TypeError, lambda: a * a)
+        self.assertRaises(TypeError, lambda: a // a)
+        # date + date is senseless
+        self.assertRaises(TypeError, lambda: a + a)
+
+    def test_overflow(self):
+        tiny = self.theclass.resolution
+
+        dt = self.theclass.min + tiny
+        dt -= tiny  # no problem
+        self.assertRaises(OverflowError, dt.__sub__, tiny)
+        self.assertRaises(OverflowError, dt.__add__, -tiny)
+
+        dt = self.theclass.max - tiny
+        dt += tiny  # no problem
+        self.assertRaises(OverflowError, dt.__add__, tiny)
+        self.assertRaises(OverflowError, dt.__sub__, -tiny)
+
+    def test_fromtimestamp(self):
+        import time
+
+        # Try an arbitrary fixed value.
+        year, month, day = 1999, 9, 19
+        ts = time.mktime((year, month, day, 0, 0, 0, 0, 0, -1))
+        d = self.theclass.fromtimestamp(ts)
+        self.assertEqual(d.year, year)
+        self.assertEqual(d.month, month)
+        self.assertEqual(d.day, day)
+
+    def test_today(self):
+        import time
+
+        # We claim that today() is like fromtimestamp(time.time()), so
+        # prove it.
+        for dummy in range(3):
+            today = self.theclass.today()
+            ts = time.time()
+            todayagain = self.theclass.fromtimestamp(ts)
+            if today == todayagain:
+                break
+            # There are several legit reasons that could fail:
+            # 1. It recently became midnight, between the today() and the
+            #    time() calls.
+            # 2. The platform time() has such fine resolution that we'll
+            #    never get the same value twice.
+            # 3. The platform time() has poor resolution, and we just
+            #    happened to call today() right before a resolution quantum
+            #    boundary.
+            # 4. The system clock got fiddled between calls.
+            # In any case, wait a little while and try again.
+            time.sleep(0.1)
+
+        # It worked or it didn't.  If it didn't, assume it's reason #2, and
+        # let the test pass if they're within half a second of each other.
+        self.failUnless(today == todayagain or
+                        abs(todayagain - today) < timedelta(seconds=0.5))
+
+    def test_weekday(self):
+        for i in range(7):
+            # March 4, 2002 is a Monday
+            self.assertEqual(self.theclass(2002, 3, 4+i).weekday(), i)
+            self.assertEqual(self.theclass(2002, 3, 4+i).isoweekday(), i+1)
+            # January 2, 1956 is a Monday
+            self.assertEqual(self.theclass(1956, 1, 2+i).weekday(), i)
+            self.assertEqual(self.theclass(1956, 1, 2+i).isoweekday(), i+1)
+
+    def test_isocalendar(self):
+        # Check examples from
+        # http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm
+        for i in range(7):
+            d = self.theclass(2003, 12, 22+i)
+            self.assertEqual(d.isocalendar(), (2003, 52, i+1))
+            d = self.theclass(2003, 12, 29) + timedelta(i)
+            self.assertEqual(d.isocalendar(), (2004, 1, i+1))
+            d = self.theclass(2004, 1, 5+i)
+            self.assertEqual(d.isocalendar(), (2004, 2, i+1))
+            d = self.theclass(2009, 12, 21+i)
+            self.assertEqual(d.isocalendar(), (2009, 52, i+1))
+            d = self.theclass(2009, 12, 28) + timedelta(i)
+            self.assertEqual(d.isocalendar(), (2009, 53, i+1))
+            d = self.theclass(2010, 1, 4+i)
+            self.assertEqual(d.isocalendar(), (2010, 1, i+1))
+
+    def test_iso_long_years(self):
+        # Calculate long ISO years and compare to table from
+        # http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm
+        ISO_LONG_YEARS_TABLE = """
+              4   32   60   88
+              9   37   65   93
+             15   43   71   99
+             20   48   76
+             26   54   82
+
+            105  133  161  189
+            111  139  167  195
+            116  144  172
+            122  150  178
+            128  156  184
+
+            201  229  257  285
+            207  235  263  291
+            212  240  268  296
+            218  246  274
+            224  252  280
+
+            303  331  359  387
+            308  336  364  392
+            314  342  370  398
+            320  348  376
+            325  353  381
+        """
+        iso_long_years = map(int, ISO_LONG_YEARS_TABLE.split())
+        iso_long_years.sort()
+        L = []
+        for i in range(400):
+            d = self.theclass(2000+i, 12, 31)
+            d1 = self.theclass(1600+i, 12, 31)
+            self.assertEqual(d.isocalendar()[1:], d1.isocalendar()[1:])
+            if d.isocalendar()[1] == 53:
+                L.append(i)
+        self.assertEqual(L, iso_long_years)
+
+    def test_isoformat(self):
+        t = self.theclass(2, 3, 2)
+        self.assertEqual(t.isoformat(), "0002-03-02")
+
+    def test_ctime(self):
+        t = self.theclass(2002, 3, 2)
+        self.assertEqual(t.ctime(), "Sat Mar  2 00:00:00 2002")
+
+    def test_strftime(self):
+        t = self.theclass(2005, 3, 2)
+        self.assertEqual(t.strftime("m:%m d:%d y:%y"), "m:03 d:02 y:05")
+
+        self.assertRaises(TypeError, t.strftime) # needs an arg
+        self.assertRaises(TypeError, t.strftime, "one", "two") # too many args
+        self.assertRaises(TypeError, t.strftime, 42) # arg wrong type
+
+        # A naive object replaces %z and %Z w/ empty strings.
+        self.assertEqual(t.strftime("'%z' '%Z'"), "'' ''")
+
+    def test_resolution_info(self):
+        self.assert_(isinstance(self.theclass.min, self.theclass))
+        self.assert_(isinstance(self.theclass.max, self.theclass))
+        self.assert_(isinstance(self.theclass.resolution, timedelta))
+        self.assert_(self.theclass.max > self.theclass.min)
+
+    def test_extreme_timedelta(self):
+        big = self.theclass.max - self.theclass.min
+        # 3652058 days, 23 hours, 59 minutes, 59 seconds, 999999 microseconds
+        n = (big.days*24*3600 + big.seconds)*1000000 + big.microseconds
+        # n == 315537897599999999 ~= 2**58.13
+        justasbig = timedelta(0, 0, n)
+        self.assertEqual(big, justasbig)
+        self.assertEqual(self.theclass.min + big, self.theclass.max)
+        self.assertEqual(self.theclass.max - big, self.theclass.min)
+
+    def test_timetuple(self):
+        for i in range(7):
+            # January 2, 1956 is a Monday (0)
+            d = self.theclass(1956, 1, 2+i)
+            t = d.timetuple()
+            self.assertEqual(t, (1956, 1, 2+i, 0, 0, 0, i, 2+i, -1))
+            # February 1, 1956 is a Wednesday (2)
+            d = self.theclass(1956, 2, 1+i)
+            t = d.timetuple()
+            self.assertEqual(t, (1956, 2, 1+i, 0, 0, 0, (2+i)%7, 32+i, -1))
+            # March 1, 1956 is a Thursday (3), and is the 31+29+1 = 61st day
+            # of the year.
+            d = self.theclass(1956, 3, 1+i)
+            t = d.timetuple()
+            self.assertEqual(t, (1956, 3, 1+i, 0, 0, 0, (3+i)%7, 61+i, -1))
+            self.assertEqual(t.tm_year, 1956)
+            self.assertEqual(t.tm_mon, 3)
+            self.assertEqual(t.tm_mday, 1+i)
+            self.assertEqual(t.tm_hour, 0)
+            self.assertEqual(t.tm_min, 0)
+            self.assertEqual(t.tm_sec, 0)
+            self.assertEqual(t.tm_wday, (3+i)%7)
+            self.assertEqual(t.tm_yday, 61+i)
+            self.assertEqual(t.tm_isdst, -1)
+
+    def test_pickling(self):
+        import pickle, cPickle
+        args = 6, 7, 23
+        orig = self.theclass(*args)
+        state = orig.__getstate__()
+        self.assertEqual(state, '\x00\x06\x07\x17')
+        derived = self.theclass(1, 1, 1)
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+
+    def test_compare(self):
+        t1 = self.theclass(2, 3, 4)
+        t2 = self.theclass(2, 3, 4)
+        self.failUnless(t1 == t2)
+        self.failUnless(t1 <= t2)
+        self.failUnless(t1 >= t2)
+        self.failUnless(not t1 != t2)
+        self.failUnless(not t1 < t2)
+        self.failUnless(not t1 > t2)
+        self.assertEqual(cmp(t1, t2), 0)
+        self.assertEqual(cmp(t2, t1), 0)
+
+        for args in (3, 3, 3), (2, 4, 4), (2, 3, 5):
+            t2 = self.theclass(*args)   # this is larger than t1
+            self.failUnless(t1 < t2)
+            self.failUnless(t2 > t1)
+            self.failUnless(t1 <= t2)
+            self.failUnless(t2 >= t1)
+            self.failUnless(t1 != t2)
+            self.failUnless(t2 != t1)
+            self.failUnless(not t1 == t2)
+            self.failUnless(not t2 == t1)
+            self.failUnless(not t1 > t2)
+            self.failUnless(not t2 < t1)
+            self.failUnless(not t1 >= t2)
+            self.failUnless(not t2 <= t1)
+            self.assertEqual(cmp(t1, t2), -1)
+            self.assertEqual(cmp(t2, t1), 1)
+
+        for badarg in 10, 10L, 34.5, "abc", {}, [], ():
+            self.assertRaises(TypeError, lambda: t1 == badarg)
+            self.assertRaises(TypeError, lambda: t1 != badarg)
+            self.assertRaises(TypeError, lambda: t1 <= badarg)
+            self.assertRaises(TypeError, lambda: t1 < badarg)
+            self.assertRaises(TypeError, lambda: t1 > badarg)
+            self.assertRaises(TypeError, lambda: t1 >= badarg)
+            self.assertRaises(TypeError, lambda: badarg == t1)
+            self.assertRaises(TypeError, lambda: badarg != t1)
+            self.assertRaises(TypeError, lambda: badarg <= t1)
+            self.assertRaises(TypeError, lambda: badarg < t1)
+            self.assertRaises(TypeError, lambda: badarg > t1)
+            self.assertRaises(TypeError, lambda: badarg >= t1)
+
+    def test_bool(self):
+        # All dates are considered true.
+        self.failUnless(self.theclass.min)
+        self.failUnless(self.theclass.max)
+
+#############################################################################
+# datetime tests
+
+class TestDateTime(TestDate):
+
+    theclass = datetime
+
+    def test_basic_attributes(self):
+        dt = self.theclass(2002, 3, 1, 12, 0)
+        self.assertEqual(dt.year, 2002)
+        self.assertEqual(dt.month, 3)
+        self.assertEqual(dt.day, 1)
+        self.assertEqual(dt.hour, 12)
+        self.assertEqual(dt.minute, 0)
+        self.assertEqual(dt.second, 0)
+        self.assertEqual(dt.microsecond, 0)
+
+    def test_basic_attributes_nonzero(self):
+        # Make sure all attributes are non-zero so bugs in
+        # bit-shifting access show up.
+        dt = self.theclass(2002, 3, 1, 12, 59, 59, 8000)
+        self.assertEqual(dt.year, 2002)
+        self.assertEqual(dt.month, 3)
+        self.assertEqual(dt.day, 1)
+        self.assertEqual(dt.hour, 12)
+        self.assertEqual(dt.minute, 59)
+        self.assertEqual(dt.second, 59)
+        self.assertEqual(dt.microsecond, 8000)
+
+    def test_roundtrip(self):
+        for dt in (self.theclass(1, 2, 3, 4, 5, 6, 7),
+                   self.theclass.now()):
+            # Verify dt -> string -> datetime identity.
+            s = repr(dt)
+            self.failUnless(s.startswith('datetime.'))
+            s = s[9:]
+            dt2 = eval(s)
+            self.assertEqual(dt, dt2)
+
+            # Verify identity via reconstructing from pieces.
+            dt2 = self.theclass(dt.year, dt.month, dt.day,
+                                dt.hour, dt.minute, dt.second,
+                                dt.microsecond)
+            self.assertEqual(dt, dt2)
+
+    def test_isoformat(self):
+        t = self.theclass(2, 3, 2, 4, 5, 1, 123)
+        self.assertEqual(t.isoformat(),    "0002-03-02T04:05:01.000123")
+        self.assertEqual(t.isoformat('T'), "0002-03-02T04:05:01.000123")
+        self.assertEqual(t.isoformat(' '), "0002-03-02 04:05:01.000123")
+        # str is ISO format with the separator forced to a blank.
+        self.assertEqual(str(t), "0002-03-02 04:05:01.000123")
+
+        t = self.theclass(2, 3, 2)
+        self.assertEqual(t.isoformat(),    "0002-03-02T00:00:00")
+        self.assertEqual(t.isoformat('T'), "0002-03-02T00:00:00")
+        self.assertEqual(t.isoformat(' '), "0002-03-02 00:00:00")
+        # str is ISO format with the separator forced to a blank.
+        self.assertEqual(str(t), "0002-03-02 00:00:00")
+
+    def test_more_ctime(self):
+        # Test fields that TestDate doesn't touch.
+        import time
+
+        t = self.theclass(2002, 3, 2, 18, 3, 5, 123)
+        self.assertEqual(t.ctime(), "Sat Mar  2 18:03:05 2002")
+        # Oops!  The next line fails on Win2K under MSVC 6, so it's commented
+        # out.  The difference is that t.ctime() produces " 2" for the day,
+        # but platform ctime() produces "02" for the day.  According to
+        # C99, t.ctime() is correct here.
+        # self.assertEqual(t.ctime(), time.ctime(time.mktime(t.timetuple())))
+
+        # So test a case where that difference doesn't matter.
+        t = self.theclass(2002, 3, 22, 18, 3, 5, 123)
+        self.assertEqual(t.ctime(), time.ctime(time.mktime(t.timetuple())))
+
+    def test_tz_independent_comparing(self):
+        dt1 = self.theclass(2002, 3, 1, 9, 0, 0)
+        dt2 = self.theclass(2002, 3, 1, 10, 0, 0)
+        dt3 = self.theclass(2002, 3, 1, 9, 0, 0)
+        self.assertEqual(dt1, dt3)
+        self.assert_(dt2 > dt3)
+
+        # Make sure comparison doesn't forget microseconds, and isn't done
+        # via comparing a float timestamp (an IEEE double doesn't have enough
+        # precision to span microsecond resolution across years 1 thru 9999,
+        # so comparing via timestamp necessarily calls some distinct values
+        # equal).
+        dt1 = self.theclass(MAXYEAR, 12, 31, 23, 59, 59, 999998)
+        us = timedelta(microseconds=1)
+        dt2 = dt1 + us
+        self.assertEqual(dt2 - dt1, us)
+        self.assert_(dt1 < dt2)
+
+    def test_bad_constructor_arguments(self):
+        # bad years
+        self.theclass(MINYEAR, 1, 1)  # no exception
+        self.theclass(MAXYEAR, 1, 1)  # no exception
+        self.assertRaises(ValueError, self.theclass, MINYEAR-1, 1, 1)
+        self.assertRaises(ValueError, self.theclass, MAXYEAR+1, 1, 1)
+        # bad months
+        self.theclass(2000, 1, 1)    # no exception
+        self.theclass(2000, 12, 1)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 0, 1)
+        self.assertRaises(ValueError, self.theclass, 2000, 13, 1)
+        # bad days
+        self.theclass(2000, 2, 29)   # no exception
+        self.theclass(2004, 2, 29)   # no exception
+        self.theclass(2400, 2, 29)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 2, 30)
+        self.assertRaises(ValueError, self.theclass, 2001, 2, 29)
+        self.assertRaises(ValueError, self.theclass, 2100, 2, 29)
+        self.assertRaises(ValueError, self.theclass, 1900, 2, 29)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 0)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 32)
+        # bad hours
+        self.theclass(2000, 1, 31, 0)    # no exception
+        self.theclass(2000, 1, 31, 23)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 31, -1)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 31, 24)
+        # bad minutes
+        self.theclass(2000, 1, 31, 23, 0)    # no exception
+        self.theclass(2000, 1, 31, 23, 59)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 31, 23, -1)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 31, 23, 60)
+        # bad seconds
+        self.theclass(2000, 1, 31, 23, 59, 0)    # no exception
+        self.theclass(2000, 1, 31, 23, 59, 59)   # no exception
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 31, 23, 59, -1)
+        self.assertRaises(ValueError, self.theclass, 2000, 1, 31, 23, 59, 60)
+        # bad microseconds
+        self.theclass(2000, 1, 31, 23, 59, 59, 0)    # no exception
+        self.theclass(2000, 1, 31, 23, 59, 59, 999999)   # no exception
+        self.assertRaises(ValueError, self.theclass,
+                          2000, 1, 31, 23, 59, 59, -1)
+        self.assertRaises(ValueError, self.theclass,
+                          2000, 1, 31, 23, 59, 59,
+                          1000000)
+
+    def test_hash_equality(self):
+        d = self.theclass(2000, 12, 31, 23, 30, 17)
+        e = self.theclass(2000, 12, 31, 23, 30, 17)
+        self.assertEqual(d, e)
+        self.assertEqual(hash(d), hash(e))
+
+        dic = {d: 1}
+        dic[e] = 2
+        self.assertEqual(len(dic), 1)
+        self.assertEqual(dic[d], 2)
+        self.assertEqual(dic[e], 2)
+
+        d = self.theclass(2001,  1,  1,  0,  5, 17)
+        e = self.theclass(2001,  1,  1,  0,  5, 17)
+        self.assertEqual(d, e)
+        self.assertEqual(hash(d), hash(e))
+
+        dic = {d: 1}
+        dic[e] = 2
+        self.assertEqual(len(dic), 1)
+        self.assertEqual(dic[d], 2)
+        self.assertEqual(dic[e], 2)
+
+    def test_computations(self):
+        a = self.theclass(2002, 1, 31)
+        b = self.theclass(1956, 1, 31)
+        diff = a-b
+        self.assertEqual(diff.days, 46*365 + len(range(1956, 2002, 4)))
+        self.assertEqual(diff.seconds, 0)
+        self.assertEqual(diff.microseconds, 0)
+        a = self.theclass(2002, 3, 2, 17, 6)
+        millisec = timedelta(0, 0, 1000)
+        hour = timedelta(0, 3600)
+        day = timedelta(1)
+        week = timedelta(7)
+        self.assertEqual(a + hour, self.theclass(2002, 3, 2, 18, 6))
+        self.assertEqual(hour + a, self.theclass(2002, 3, 2, 18, 6))
+        self.assertEqual(a + 10*hour, self.theclass(2002, 3, 3, 3, 6))
+        self.assertEqual(a - hour, self.theclass(2002, 3, 2, 16, 6))
+        self.assertEqual(-hour + a, self.theclass(2002, 3, 2, 16, 6))
+        self.assertEqual(a - hour, a + -hour)
+        self.assertEqual(a - 20*hour, self.theclass(2002, 3, 1, 21, 6))
+        self.assertEqual(a + day, self.theclass(2002, 3, 3, 17, 6))
+        self.assertEqual(a - day, self.theclass(2002, 3, 1, 17, 6))
+        self.assertEqual(a + week, self.theclass(2002, 3, 9, 17, 6))
+        self.assertEqual(a - week, self.theclass(2002, 2, 23, 17, 6))
+        self.assertEqual(a + 52*week, self.theclass(2003, 3, 1, 17, 6))
+        self.assertEqual(a - 52*week, self.theclass(2001, 3, 3, 17, 6))
+        self.assertEqual((a + week) - a, week)
+        self.assertEqual((a + day) - a, day)
+        self.assertEqual((a + hour) - a, hour)
+        self.assertEqual((a + millisec) - a, millisec)
+        self.assertEqual((a - week) - a, -week)
+        self.assertEqual((a - day) - a, -day)
+        self.assertEqual((a - hour) - a, -hour)
+        self.assertEqual((a - millisec) - a, -millisec)
+        self.assertEqual(a - (a + week), -week)
+        self.assertEqual(a - (a + day), -day)
+        self.assertEqual(a - (a + hour), -hour)
+        self.assertEqual(a - (a + millisec), -millisec)
+        self.assertEqual(a - (a - week), week)
+        self.assertEqual(a - (a - day), day)
+        self.assertEqual(a - (a - hour), hour)
+        self.assertEqual(a - (a - millisec), millisec)
+        self.assertEqual(a + (week + day + hour + millisec),
+                         self.theclass(2002, 3, 10, 18, 6, 0, 1000))
+        self.assertEqual(a + (week + day + hour + millisec),
+                         (((a + week) + day) + hour) + millisec)
+        self.assertEqual(a - (week + day + hour + millisec),
+                         self.theclass(2002, 2, 22, 16, 5, 59, 999000))
+        self.assertEqual(a - (week + day + hour + millisec),
+                         (((a - week) - day) - hour) - millisec)
+        # Add/sub ints, longs, floats should be illegal
+        for i in 1, 1L, 1.0:
+            self.assertRaises(TypeError, lambda: a+i)
+            self.assertRaises(TypeError, lambda: a-i)
+            self.assertRaises(TypeError, lambda: i+a)
+            self.assertRaises(TypeError, lambda: i-a)
+
+        # delta - datetime is senseless.
+        self.assertRaises(TypeError, lambda: day - a)
+        # mixing datetime and (delta or datetime) via * or // is senseless
+        self.assertRaises(TypeError, lambda: day * a)
+        self.assertRaises(TypeError, lambda: a * day)
+        self.assertRaises(TypeError, lambda: day // a)
+        self.assertRaises(TypeError, lambda: a // day)
+        self.assertRaises(TypeError, lambda: a * a)
+        self.assertRaises(TypeError, lambda: a // a)
+        # datetime + datetime is senseless
+        self.assertRaises(TypeError, lambda: a + a)
+
+    def test_pickling(self):
+        import pickle, cPickle
+        args = 6, 7, 23, 20, 59, 1, 64**2
+        orig = self.theclass(*args)
+        state = orig.__getstate__()
+        self.assertEqual(state, '\x00\x06\x07\x17\x14\x3b\x01\x00\x10\x00')
+        derived = self.theclass(1, 1, 1)
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+
+    def test_more_compare(self):
+        # The test_compare() inherited from TestDate covers the error cases.
+        # We just want to test lexicographic ordering on the members datetime
+        # has that date lacks.
+        args = [2000, 11, 29, 20, 58, 16, 999998]
+        t1 = self.theclass(*args)
+        t2 = self.theclass(*args)
+        self.failUnless(t1 == t2)
+        self.failUnless(t1 <= t2)
+        self.failUnless(t1 >= t2)
+        self.failUnless(not t1 != t2)
+        self.failUnless(not t1 < t2)
+        self.failUnless(not t1 > t2)
+        self.assertEqual(cmp(t1, t2), 0)
+        self.assertEqual(cmp(t2, t1), 0)
+
+        for i in range(len(args)):
+            newargs = args[:]
+            newargs[i] = args[i] + 1
+            t2 = self.theclass(*newargs)   # this is larger than t1
+            self.failUnless(t1 < t2)
+            self.failUnless(t2 > t1)
+            self.failUnless(t1 <= t2)
+            self.failUnless(t2 >= t1)
+            self.failUnless(t1 != t2)
+            self.failUnless(t2 != t1)
+            self.failUnless(not t1 == t2)
+            self.failUnless(not t2 == t1)
+            self.failUnless(not t1 > t2)
+            self.failUnless(not t2 < t1)
+            self.failUnless(not t1 >= t2)
+            self.failUnless(not t2 <= t1)
+            self.assertEqual(cmp(t1, t2), -1)
+            self.assertEqual(cmp(t2, t1), 1)
+
+
+    # A helper for timestamp constructor tests.
+    def verify_field_equality(self, expected, got):
+        self.assertEqual(expected.tm_year, got.year)
+        self.assertEqual(expected.tm_mon, got.month)
+        self.assertEqual(expected.tm_mday, got.day)
+        self.assertEqual(expected.tm_hour, got.hour)
+        self.assertEqual(expected.tm_min, got.minute)
+        self.assertEqual(expected.tm_sec, got.second)
+
+    def test_fromtimestamp(self):
+        import time
+
+        ts = time.time()
+        expected = time.localtime(ts)
+        got = self.theclass.fromtimestamp(ts)
+        self.verify_field_equality(expected, got)
+
+    def test_utcfromtimestamp(self):
+        import time
+
+        ts = time.time()
+        expected = time.gmtime(ts)
+        got = self.theclass.utcfromtimestamp(ts)
+        self.verify_field_equality(expected, got)
+
+    def test_utcnow(self):
+        import time
+
+        # Call it a success if utcnow() and utcfromtimestamp() are within
+        # a second of each other.
+        tolerance = timedelta(seconds=1)
+        for dummy in range(3):
+            from_now = self.theclass.utcnow()
+            from_timestamp = self.theclass.utcfromtimestamp(time.time())
+            if abs(from_timestamp - from_now) <= tolerance:
+                break
+            # Else try again a few times.
+        self.failUnless(abs(from_timestamp - from_now) <= tolerance)
+
+    def test_more_timetuple(self):
+        # This tests fields beyond those tested by the TestDate.test_timetuple.
+        t = self.theclass(2004, 12, 31, 6, 22, 33)
+        self.assertEqual(t.timetuple(), (2004, 12, 31, 6, 22, 33, 4, 366, -1))
+        self.assertEqual(t.timetuple(),
+                         (t.year, t.month, t.day,
+                          t.hour, t.minute, t.second,
+                          t.weekday(),
+                          t.toordinal() - date(t.year, 1, 1).toordinal() + 1,
+                          -1))
+        tt = t.timetuple()
+        self.assertEqual(tt.tm_year, t.year)
+        self.assertEqual(tt.tm_mon, t.month)
+        self.assertEqual(tt.tm_mday, t.day)
+        self.assertEqual(tt.tm_hour, t.hour)
+        self.assertEqual(tt.tm_min, t.minute)
+        self.assertEqual(tt.tm_sec, t.second)
+        self.assertEqual(tt.tm_wday, t.weekday())
+        self.assertEqual(tt.tm_yday, t.toordinal() -
+                                     date(t.year, 1, 1).toordinal() + 1)
+        self.assertEqual(tt.tm_isdst, -1)
+
+    def test_more_strftime(self):
+        # This tests fields beyond those tested by the TestDate.test_strftime.
+        t = self.theclass(2004, 12, 31, 6, 22, 33)
+        self.assertEqual(t.strftime("%m %d %y %S %M %H %j"),
+                                    "12 31 04 33 22 06 366")
+
+    def test_extract(self):
+        dt = self.theclass(2002, 3, 4, 18, 45, 3, 1234)
+        self.assertEqual(dt.date(), date(2002, 3, 4))
+        self.assertEqual(dt.time(), time(18, 45, 3, 1234))
+
+    def test_combine(self):
+        d = date(2002, 3, 4)
+        t = time(18, 45, 3, 1234)
+        expected = self.theclass(2002, 3, 4, 18, 45, 3, 1234)
+        combine = self.theclass.combine
+        dt = combine(d, t)
+        self.assertEqual(dt, expected)
+
+        dt = combine(time=t, date=d)
+        self.assertEqual(dt, expected)
+
+        self.assertEqual(d, dt.date())
+        self.assertEqual(t, dt.time())
+        self.assertEqual(dt, combine(dt.date(), dt.time()))
+
+        self.assertRaises(TypeError, combine) # need an arg
+        self.assertRaises(TypeError, combine, d) # need two args
+        self.assertRaises(TypeError, combine, t, d) # args reversed
+        self.assertRaises(TypeError, combine, d, t, 1) # too many args
+        self.assertRaises(TypeError, combine, "date", "time") # wrong types
+
+class TestTime(unittest.TestCase):
+
+    theclass = time
+
+    def test_basic_attributes(self):
+        t = self.theclass(12, 0)
+        self.assertEqual(t.hour, 12)
+        self.assertEqual(t.minute, 0)
+        self.assertEqual(t.second, 0)
+        self.assertEqual(t.microsecond, 0)
+
+    def test_basic_attributes_nonzero(self):
+        # Make sure all attributes are non-zero so bugs in
+        # bit-shifting access show up.
+        t = self.theclass(12, 59, 59, 8000)
+        self.assertEqual(t.hour, 12)
+        self.assertEqual(t.minute, 59)
+        self.assertEqual(t.second, 59)
+        self.assertEqual(t.microsecond, 8000)
+
+    def test_roundtrip(self):
+        t = self.theclass(1, 2, 3, 4)
+
+        # Verify t -> string -> time identity.
+        s = repr(t)
+        self.failUnless(s.startswith('datetime.'))
+        s = s[9:]
+        t2 = eval(s)
+        self.assertEqual(t, t2)
+
+        # Verify identity via reconstructing from pieces.
+        t2 = self.theclass(t.hour, t.minute, t.second,
+                           t.microsecond)
+        self.assertEqual(t, t2)
+
+    def test_comparing(self):
+        args = [1, 2, 3, 4]
+        t1 = self.theclass(*args)
+        t2 = self.theclass(*args)
+        self.failUnless(t1 == t2)
+        self.failUnless(t1 <= t2)
+        self.failUnless(t1 >= t2)
+        self.failUnless(not t1 != t2)
+        self.failUnless(not t1 < t2)
+        self.failUnless(not t1 > t2)
+        self.assertEqual(cmp(t1, t2), 0)
+        self.assertEqual(cmp(t2, t1), 0)
+
+        for i in range(len(args)):
+            newargs = args[:]
+            newargs[i] = args[i] + 1
+            t2 = self.theclass(*newargs)   # this is larger than t1
+            self.failUnless(t1 < t2)
+            self.failUnless(t2 > t1)
+            self.failUnless(t1 <= t2)
+            self.failUnless(t2 >= t1)
+            self.failUnless(t1 != t2)
+            self.failUnless(t2 != t1)
+            self.failUnless(not t1 == t2)
+            self.failUnless(not t2 == t1)
+            self.failUnless(not t1 > t2)
+            self.failUnless(not t2 < t1)
+            self.failUnless(not t1 >= t2)
+            self.failUnless(not t2 <= t1)
+            self.assertEqual(cmp(t1, t2), -1)
+            self.assertEqual(cmp(t2, t1), 1)
+
+        for badarg in (10, 10L, 34.5, "abc", {}, [], (), date(1, 1, 1),
+                       datetime(1, 1, 1, 1, 1), timedelta(9)):
+            self.assertRaises(TypeError, lambda: t1 == badarg)
+            self.assertRaises(TypeError, lambda: t1 != badarg)
+            self.assertRaises(TypeError, lambda: t1 <= badarg)
+            self.assertRaises(TypeError, lambda: t1 < badarg)
+            self.assertRaises(TypeError, lambda: t1 > badarg)
+            self.assertRaises(TypeError, lambda: t1 >= badarg)
+            self.assertRaises(TypeError, lambda: badarg == t1)
+            self.assertRaises(TypeError, lambda: badarg != t1)
+            self.assertRaises(TypeError, lambda: badarg <= t1)
+            self.assertRaises(TypeError, lambda: badarg < t1)
+            self.assertRaises(TypeError, lambda: badarg > t1)
+            self.assertRaises(TypeError, lambda: badarg >= t1)
+
+    def test_bad_constructor_arguments(self):
+        # bad hours
+        self.theclass(0, 0)    # no exception
+        self.theclass(23, 0)   # no exception
+        self.assertRaises(ValueError, self.theclass, -1, 0)
+        self.assertRaises(ValueError, self.theclass, 24, 0)
+        # bad minutes
+        self.theclass(23, 0)    # no exception
+        self.theclass(23, 59)   # no exception
+        self.assertRaises(ValueError, self.theclass, 23, -1)
+        self.assertRaises(ValueError, self.theclass, 23, 60)
+        # bad seconds
+        self.theclass(23, 59, 0)    # no exception
+        self.theclass(23, 59, 59)   # no exception
+        self.assertRaises(ValueError, self.theclass, 23, 59, -1)
+        self.assertRaises(ValueError, self.theclass, 23, 59, 60)
+        # bad microseconds
+        self.theclass(23, 59, 59, 0)        # no exception
+        self.theclass(23, 59, 59, 999999)   # no exception
+        self.assertRaises(ValueError, self.theclass, 23, 59, 59, -1)
+        self.assertRaises(ValueError, self.theclass, 23, 59, 59, 1000000)
+
+    def test_hash_equality(self):
+        d = self.theclass(23, 30, 17)
+        e = self.theclass(23, 30, 17)
+        self.assertEqual(d, e)
+        self.assertEqual(hash(d), hash(e))
+
+        dic = {d: 1}
+        dic[e] = 2
+        self.assertEqual(len(dic), 1)
+        self.assertEqual(dic[d], 2)
+        self.assertEqual(dic[e], 2)
+
+        d = self.theclass(0,  5, 17)
+        e = self.theclass(0,  5, 17)
+        self.assertEqual(d, e)
+        self.assertEqual(hash(d), hash(e))
+
+        dic = {d: 1}
+        dic[e] = 2
+        self.assertEqual(len(dic), 1)
+        self.assertEqual(dic[d], 2)
+        self.assertEqual(dic[e], 2)
+
+    def test_isoformat(self):
+        t = self.theclass(4, 5, 1, 123)
+        self.assertEqual(t.isoformat(), "04:05:01.000123")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass()
+        self.assertEqual(t.isoformat(), "00:00:00")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass(microsecond=1)
+        self.assertEqual(t.isoformat(), "00:00:00.000001")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass(microsecond=10)
+        self.assertEqual(t.isoformat(), "00:00:00.000010")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass(microsecond=100)
+        self.assertEqual(t.isoformat(), "00:00:00.000100")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass(microsecond=1000)
+        self.assertEqual(t.isoformat(), "00:00:00.001000")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass(microsecond=10000)
+        self.assertEqual(t.isoformat(), "00:00:00.010000")
+        self.assertEqual(t.isoformat(), str(t))
+
+        t = self.theclass(microsecond=100000)
+        self.assertEqual(t.isoformat(), "00:00:00.100000")
+        self.assertEqual(t.isoformat(), str(t))
+
+    def test_strftime(self):
+        t = self.theclass(1, 2, 3, 4)
+        self.assertEqual(t.strftime('%H %M %S'), "01 02 03")
+        # A naive object replaces %z and %Z with empty strings.
+        self.assertEqual(t.strftime("'%z' '%Z'"), "'' ''")
+
+    def test_str(self):
+        self.assertEqual(str(self.theclass(1, 2, 3, 4)), "01:02:03.000004")
+        self.assertEqual(str(self.theclass(10, 2, 3, 4000)), "10:02:03.004000")
+        self.assertEqual(str(self.theclass(0, 2, 3, 400000)), "00:02:03.400000")
+        self.assertEqual(str(self.theclass(12, 2, 3, 0)), "12:02:03")
+        self.assertEqual(str(self.theclass(23, 15, 0, 0)), "23:15:00")
+
+    def test_repr(self):
+        name = 'datetime.' + self.theclass.__name__
+        self.assertEqual(repr(self.theclass(1, 2, 3, 4)),
+                         "%s(1, 2, 3, 4)" % name)
+        self.assertEqual(repr(self.theclass(10, 2, 3, 4000)),
+                         "%s(10, 2, 3, 4000)" % name)
+        self.assertEqual(repr(self.theclass(0, 2, 3, 400000)),
+                         "%s(0, 2, 3, 400000)" % name)
+        self.assertEqual(repr(self.theclass(12, 2, 3, 0)),
+                         "%s(12, 2, 3)" % name)
+        self.assertEqual(repr(self.theclass(23, 15, 0, 0)),
+                         "%s(23, 15)" % name)
+
+    def test_resolution_info(self):
+        self.assert_(isinstance(self.theclass.min, self.theclass))
+        self.assert_(isinstance(self.theclass.max, self.theclass))
+        self.assert_(isinstance(self.theclass.resolution, timedelta))
+        self.assert_(self.theclass.max > self.theclass.min)
+
+    def test_pickling(self):
+        import pickle, cPickle
+        args = 20, 59, 16, 64**2
+        orig = self.theclass(*args)
+        state = orig.__getstate__()
+        self.assertEqual(state, '\x14\x3b\x10\x00\x10\x00')
+        derived = self.theclass()
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+
+    def test_bool(self):
+        cls = self.theclass
+        self.failUnless(cls(1))
+        self.failUnless(cls(0, 1))
+        self.failUnless(cls(0, 0, 1))
+        self.failUnless(cls(0, 0, 0, 1))
+        self.failUnless(not cls(0))
+        self.failUnless(not cls())
+
+
+class TestTimeTZ(TestTime):
+
+    theclass = timetz
+
+    def test_empty(self):
+        t = self.theclass()
+        self.assertEqual(t.hour, 0)
+        self.assertEqual(t.minute, 0)
+        self.assertEqual(t.second, 0)
+        self.assertEqual(t.microsecond, 0)
+        self.failUnless(t.tzinfo is None)
+
+    def test_bad_tzinfo_classes(self):
+        tz = self.theclass
+        self.assertRaises(TypeError, tz, tzinfo=12)
+
+        class NiceTry(object):
+            def __init__(self): pass
+            def utcoffset(self, dt): pass
+        self.assertRaises(TypeError, tz, tzinfo=NiceTry)
+
+        class BetterTry(tzinfo):
+            def __init__(self): pass
+            def utcoffset(self, dt): pass
+        b = BetterTry()
+        t = tz(tzinfo=b)
+        self.failUnless(t.tzinfo is b)
+
+    def test_zones(self):
+        est = FixedOffset(-300, "EST", 1)
+        utc = FixedOffset(0, "UTC", -2)
+        met = FixedOffset(60, "MET", 3)
+        t1 = timetz( 7, 47, tzinfo=est)
+        t2 = timetz(12, 47, tzinfo=utc)
+        t3 = timetz(13, 47, tzinfo=met)
+        t4 = timetz(microsecond=40)
+        t5 = timetz(microsecond=40, tzinfo=utc)
+
+        self.assertEqual(t1.tzinfo, est)
+        self.assertEqual(t2.tzinfo, utc)
+        self.assertEqual(t3.tzinfo, met)
+        self.failUnless(t4.tzinfo is None)
+        self.assertEqual(t5.tzinfo, utc)
+
+        self.assertEqual(t1.utcoffset(), -300)
+        self.assertEqual(t2.utcoffset(), 0)
+        self.assertEqual(t3.utcoffset(), 60)
+        self.failUnless(t4.utcoffset() is None)
+        self.assertRaises(TypeError, t1.utcoffset, "no args")
+
+        self.assertEqual(t1.tzname(), "EST")
+        self.assertEqual(t2.tzname(), "UTC")
+        self.assertEqual(t3.tzname(), "MET")
+        self.failUnless(t4.tzname() is None)
+        self.assertRaises(TypeError, t1.tzname, "no args")
+
+        self.assertEqual(t1.dst(), 1)
+        self.assertEqual(t2.dst(), -2)
+        self.assertEqual(t3.dst(), 3)
+        self.failUnless(t4.dst() is None)
+        self.assertRaises(TypeError, t1.dst, "no args")
+
+        self.assertEqual(hash(t1), hash(t2))
+        self.assertEqual(hash(t1), hash(t3))
+        self.assertEqual(hash(t2), hash(t3))
+
+        self.assertEqual(t1, t2)
+        self.assertEqual(t1, t3)
+        self.assertEqual(t2, t3)
+        self.assertRaises(TypeError, lambda: t4 == t5) # mixed tz-aware & naive
+        self.assertRaises(TypeError, lambda: t4 < t5) # mixed tz-aware & naive
+        self.assertRaises(TypeError, lambda: t5 < t4) # mixed tz-aware & naive
+
+        self.assertEqual(str(t1), "07:47:00-05:00")
+        self.assertEqual(str(t2), "12:47:00+00:00")
+        self.assertEqual(str(t3), "13:47:00+01:00")
+        self.assertEqual(str(t4), "00:00:00.000040")
+        self.assertEqual(str(t5), "00:00:00.000040+00:00")
+
+        self.assertEqual(t1.isoformat(), "07:47:00-05:00")
+        self.assertEqual(t2.isoformat(), "12:47:00+00:00")
+        self.assertEqual(t3.isoformat(), "13:47:00+01:00")
+        self.assertEqual(t4.isoformat(), "00:00:00.000040")
+        self.assertEqual(t5.isoformat(), "00:00:00.000040+00:00")
+
+        d = 'datetime.timetz'
+        self.assertEqual(repr(t1), d + "(7, 47, tzinfo=est)")
+        self.assertEqual(repr(t2), d + "(12, 47, tzinfo=utc)")
+        self.assertEqual(repr(t3), d + "(13, 47, tzinfo=met)")
+        self.assertEqual(repr(t4), d + "(0, 0, 0, 40)")
+        self.assertEqual(repr(t5), d + "(0, 0, 0, 40, tzinfo=utc)")
+
+        self.assertEqual(t1.strftime("%H:%M:%S %%Z=%Z %%z=%z"),
+                                     "07:47:00 %Z=EST %z=-0500")
+        self.assertEqual(t2.strftime("%H:%M:%S %Z %z"), "12:47:00 UTC +0000")
+        self.assertEqual(t3.strftime("%H:%M:%S %Z %z"), "13:47:00 MET +0100")
+
+        yuck = FixedOffset(-1439, "%z %Z %%z%%Z")
+        t1 = timetz(23, 59, tzinfo=yuck)
+        self.assertEqual(t1.strftime("%H:%M %%Z='%Z' %%z='%z'"),
+                                     "23:59 %Z='%z %Z %%z%%Z' %z='-2359'")
+
+
+    def test_hash_edge_cases(self):
+        # Offsets that overflow a basic time.
+        t1 = self.theclass(0, 1, 2, 3, tzinfo=FixedOffset(1439, ""))
+        t2 = self.theclass(0, 0, 2, 3, tzinfo=FixedOffset(1438, ""))
+        self.assertEqual(hash(t1), hash(t2))
+
+        t1 = self.theclass(23, 58, 6, 100, tzinfo=FixedOffset(-1000, ""))
+        t2 = self.theclass(23, 48, 6, 100, tzinfo=FixedOffset(-1010, ""))
+        self.assertEqual(hash(t1), hash(t2))
+
+    def test_utc_offset_out_of_bounds(self):
+        class Edgy(tzinfo):
+            def __init__(self, offset):
+                self.offset = offset
+            def utcoffset(self, dt):
+                return self.offset
+
+        for offset, legit in ((-1440, False),
+                              (-1439, True),
+                              (1439, True),
+                              (1440, False)):
+            t = timetz(1, 2, 3, tzinfo=Edgy(offset))
+            if legit:
+                aofs = abs(offset)
+                h, m = divmod(aofs, 60)
+                tag = "%c%02d:%02d" % (offset < 0 and '-' or '+', h, m)
+                self.assertEqual(str(t), "01:02:03" + tag)
+            else:
+                self.assertRaises(ValueError, str, t)
+
+    def test_pickling(self):
+        import pickle, cPickle
+
+        # Try one without a tzinfo.
+        args = 20, 59, 16, 64**2
+        orig = self.theclass(*args)
+        state = orig.__getstate__()
+        self.assertEqual(state, ('\x14\x3b\x10\x00\x10\x00',))
+        derived = self.theclass()
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+
+        # Try one with a tzinfo.
+        tinfo = FixedOffset(-300, 'cookie')
+        orig = self.theclass(5, 6, 7, tzinfo=tinfo)
+        state = orig.__getstate__()
+        derived = self.theclass()
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        self.failUnless(isinstance(derived.tzinfo, FixedOffset))
+        self.assertEqual(derived.utcoffset(), -300)
+        self.assertEqual(derived.tzname(), 'cookie')
+
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+                self.failUnless(isinstance(derived.tzinfo, FixedOffset))
+                self.assertEqual(derived.utcoffset(), -300)
+                self.assertEqual(derived.tzname(), 'cookie')
+
+    def test_more_bool(self):
+        # Test cases with non-None tzinfo.
+        cls = self.theclass
+
+        t = cls(0, tzinfo=FixedOffset(-300, ""))
+        self.failUnless(t)
+
+        t = cls(5, tzinfo=FixedOffset(-300, ""))
+        self.failUnless(t)
+
+        t = cls(5, tzinfo=FixedOffset(300, ""))
+        self.failUnless(not t)
+
+        t = cls(23, 59, tzinfo=FixedOffset(23*60 + 59, ""))
+        self.failUnless(not t)
+
+        # Mostly ensuring this doesn't overflow internally.
+        t = cls(0, tzinfo=FixedOffset(23*60 + 59, ""))
+        self.failUnless(t)
+
+        # But this should yield a value error -- the utcoffset is bogus.
+        t = cls(0, tzinfo=FixedOffset(24*60, ""))
+        self.assertRaises(ValueError, lambda: bool(t))
+
+        # Likewise.
+        t = cls(0, tzinfo=FixedOffset(-24*60, ""))
+        self.assertRaises(ValueError, lambda: bool(t))
+
+class TestDateTimeTZ(TestDateTime):
+
+    theclass = datetimetz
+
+    def test_trivial(self):
+        dt = self.theclass(1, 2, 3, 4, 5, 6, 7)
+        self.assertEqual(dt.year, 1)
+        self.assertEqual(dt.month, 2)
+        self.assertEqual(dt.day, 3)
+        self.assertEqual(dt.hour, 4)
+        self.assertEqual(dt.minute, 5)
+        self.assertEqual(dt.second, 6)
+        self.assertEqual(dt.microsecond, 7)
+        self.assertEqual(dt.tzinfo, None)
+
+    def test_even_more_compare(self):
+        # The test_compare() and test_more_compare() inherited from TestDate
+        # and TestDateTime covered non-tzinfo cases.
+
+        # Smallest possible after UTC adjustment.
+        t1 = self.theclass(1, 1, 1, tzinfo=FixedOffset(1439, ""))
+        # Largest possible after UTC adjustment.
+        t2 = self.theclass(MAXYEAR, 12, 31, 23, 59, 59, 999999,
+                           tzinfo=FixedOffset(-1439, ""))
+
+        # Make sure those compare correctly, and w/o overflow.
+        self.failUnless(t1 < t2)
+        self.failUnless(t1 != t2)
+        self.failUnless(t2 > t1)
+
+        self.failUnless(t1 == t1)
+        self.failUnless(t2 == t2)
+
+        # Equal afer adjustment.
+        t1 = self.theclass(1, 12, 31, 23, 59, tzinfo=FixedOffset(1, ""))
+        t2 = self.theclass(2, 1, 1, 3, 13, tzinfo=FixedOffset(3*60+13+2, ""))
+        self.assertEqual(t1, t2)
+
+        # Change t1 not to subtract a minute, and t1 should be larger.
+        t1 = self.theclass(1, 12, 31, 23, 59, tzinfo=FixedOffset(0, ""))
+        self.failUnless(t1 > t2)
+
+        # Change t1 to subtract 2 minutes, and t1 should be smaller.
+        t1 = self.theclass(1, 12, 31, 23, 59, tzinfo=FixedOffset(2, ""))
+        self.failUnless(t1 < t2)
+
+        # Back to the original t1, but make seconds resolve it.
+        t1 = self.theclass(1, 12, 31, 23, 59, tzinfo=FixedOffset(1, ""),
+                           second=1)
+        self.failUnless(t1 > t2)
+
+        # Likewise, but make microseconds resolve it.
+        t1 = self.theclass(1, 12, 31, 23, 59, tzinfo=FixedOffset(1, ""),
+                           microsecond=1)
+        self.failUnless(t1 > t2)
+
+        # Make t2 naive and it should fail.
+        t2 = self.theclass.min
+        self.assertRaises(TypeError, lambda: t1 == t2)
+        self.assertEqual(t2, t2)
+
+        # It's also naive if it has tzinfo but tzinfo.utcoffset() is None.
+        class Naive(tzinfo):
+            def utcoffset(self, dt): return None
+        t2 = self.theclass(5, 6, 7, tzinfo=Naive())
+        self.assertRaises(TypeError, lambda: t1 == t2)
+        self.assertEqual(t2, t2)
+
+        # OTOH, it's OK to compare two of these mixing the two ways of being
+        # naive.
+        t1 = self.theclass(5, 6, 7)
+        self.assertEqual(t1, t2)
+
+        # Try a bogus uctoffset.
+        class Bogus(tzinfo):
+            def utcoffset(self, dt): return 1440 # out of bounds
+        t1 = self.theclass(2, 2, 2, tzinfo=Bogus())
+        t2 = self.theclass(2, 2, 2, tzinfo=FixedOffset(0, ""))
+        self.assertRaises(ValueError, lambda: t1 == t1)
+
+    def test_bad_tzinfo_classes(self):
+        tz = self.theclass
+        self.assertRaises(TypeError, tz, 1, 2, 3, tzinfo=12)
+
+        class NiceTry(object):
+            def __init__(self): pass
+            def utcoffset(self, dt): pass
+        self.assertRaises(TypeError, tz, 1, 2, 3, tzinfo=NiceTry)
+
+        class BetterTry(tzinfo):
+            def __init__(self): pass
+            def utcoffset(self, dt): pass
+        b = BetterTry()
+        t = tz(1, 2, 3, tzinfo=b)
+        self.failUnless(t.tzinfo is b)
+
+    def test_pickling(self):
+        import pickle, cPickle
+
+        # Try one without a tzinfo.
+        args = 6, 7, 23, 20, 59, 1, 64**2
+        orig = self.theclass(*args)
+        state = orig.__getstate__()
+        self.assertEqual(state, ('\x00\x06\x07\x17\x14\x3b\x01\x00\x10\x00',))
+        derived = self.theclass(1, 1, 1)
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+
+        # Try one with a tzinfo.
+        tinfo = FixedOffset(-300, 'cookie')
+        orig = self.theclass(*args, **{'tzinfo': tinfo})
+        state = orig.__getstate__()
+        derived = self.theclass(1, 1, 1)
+        derived.__setstate__(state)
+        self.assertEqual(orig, derived)
+        self.failUnless(isinstance(derived.tzinfo, FixedOffset))
+        self.assertEqual(derived.utcoffset(), -300)
+        self.assertEqual(derived.tzname(), 'cookie')
+
+        for pickler in pickle, cPickle:
+            for binary in 0, 1:
+                green = pickler.dumps(orig, binary)
+                derived = pickler.loads(green)
+                self.assertEqual(orig, derived)
+                self.failUnless(isinstance(derived.tzinfo, FixedOffset))
+                self.assertEqual(derived.utcoffset(), -300)
+                self.assertEqual(derived.tzname(), 'cookie')
+
+    def test_extreme_hashes(self):
+        # If an attempt is made to hash these via subtracting the offset
+        # then hashing a datetime object, OverflowError results.  The
+        # Python implementation used to blow up here.
+        t = self.theclass(1, 1, 1, tzinfo=FixedOffset(1439, ""))
+        hash(t)
+        t = self.theclass(MAXYEAR, 12, 31, 23, 59, 59, 999999,
+                          tzinfo=FixedOffset(-1439, ""))
+        hash(t)
+
+        # OTOH, an OOB offset should blow up.
+        t = self.theclass(5, 5, 5, tzinfo=FixedOffset(-1440, ""))
+        self.assertRaises(ValueError, hash, t)
+
+    def test_zones(self):
+        est = FixedOffset(-300, "EST")
+        utc = FixedOffset(0, "UTC")
+        met = FixedOffset(60, "MET")
+        t1 = datetimetz(2002, 3, 19,  7, 47, tzinfo=est)
+        t2 = datetimetz(2002, 3, 19, 12, 47, tzinfo=utc)
+        t3 = datetimetz(2002, 3, 19, 13, 47, tzinfo=met)
+        self.assertEqual(t1.tzinfo, est)
+        self.assertEqual(t2.tzinfo, utc)
+        self.assertEqual(t3.tzinfo, met)
+        self.assertEqual(t1.utcoffset(), -300)
+        self.assertEqual(t2.utcoffset(), 0)
+        self.assertEqual(t3.utcoffset(), 60)
+        self.assertEqual(t1.tzname(), "EST")
+        self.assertEqual(t2.tzname(), "UTC")
+        self.assertEqual(t3.tzname(), "MET")
+        self.assertEqual(hash(t1), hash(t2))
+        self.assertEqual(hash(t1), hash(t3))
+        self.assertEqual(hash(t2), hash(t3))
+        self.assertEqual(t1, t2)
+        self.assertEqual(t1, t3)
+        self.assertEqual(t2, t3)
+        self.assertEqual(str(t1), "2002-03-19 07:47:00-05:00")
+        self.assertEqual(str(t2), "2002-03-19 12:47:00+00:00")
+        self.assertEqual(str(t3), "2002-03-19 13:47:00+01:00")
+        d = 'datetime.datetimetz(2002, 3, 19, '
+        self.assertEqual(repr(t1), d + "7, 47, tzinfo=est)")
+        self.assertEqual(repr(t2), d + "12, 47, tzinfo=utc)")
+        self.assertEqual(repr(t3), d + "13, 47, tzinfo=met)")
+
+    def test_combine(self):
+        met = FixedOffset(60, "MET")
+        d = date(2002, 3, 4)
+        tz = timetz(18, 45, 3, 1234, tzinfo=met)
+        dt = datetimetz.combine(d, tz)
+        self.assertEqual(dt, datetimetz(2002, 3, 4, 18, 45, 3, 1234,
+                                        tzinfo=met))
+
+    def test_extract(self):
+        met = FixedOffset(60, "MET")
+        dt = self.theclass(2002, 3, 4, 18, 45, 3, 1234, tzinfo=met)
+        self.assertEqual(dt.date(), date(2002, 3, 4))
+        self.assertEqual(dt.time(), time(18, 45, 3, 1234))
+        self.assertEqual(dt.timetz(), timetz(18, 45, 3, 1234, tzinfo=met))
+
+    def test_tz_aware_arithmetic(self):
+        import random
+
+        now = self.theclass.now()
+        tz55 = FixedOffset(-330, "west 5:30")
+        timeaware = timetz(now.hour, now.minute, now.second,
+                           now.microsecond, tzinfo=tz55)
+        nowaware = self.theclass.combine(now.date(), timeaware)
+        self.failUnless(nowaware.tzinfo is tz55)
+        self.assertEqual(nowaware.timetz(), timeaware)
+
+        # Can't mix aware and non-aware.
+        self.assertRaises(TypeError, lambda: now - nowaware)
+        self.assertRaises(TypeError, lambda: nowaware - now)
+
+        # And adding datetimetz's doesn't make sense, aware or not.
+        self.assertRaises(TypeError, lambda: now + nowaware)
+        self.assertRaises(TypeError, lambda: nowaware + now)
+        self.assertRaises(TypeError, lambda: nowaware + nowaware)
+
+        # Subtracting should yield 0.
+        self.assertEqual(now - now, timedelta(0))
+        self.assertEqual(nowaware - nowaware, timedelta(0))
+
+        # Adding a delta should preserve tzinfo.
+        delta = timedelta(weeks=1, minutes=12, microseconds=5678)
+        nowawareplus = nowaware + delta
+        self.failUnless(nowaware.tzinfo is tz55)
+        nowawareplus2 = delta + nowaware
+        self.failUnless(nowawareplus2.tzinfo is tz55)
+        self.assertEqual(nowawareplus, nowawareplus2)
+
+        # that - delta should be what we started with, and that - what we
+        # started with should be delta.
+        diff = nowawareplus - delta
+        self.failUnless(diff.tzinfo is tz55)
+        self.assertEqual(nowaware, diff)
+        self.assertRaises(TypeError, lambda: delta - nowawareplus)
+        self.assertEqual(nowawareplus - nowaware, delta)
+
+        # Make up a random timezone.
+        tzr = FixedOffset(random.randrange(-1439, 1440), "randomtimezone")
+        # Attach it to nowawareplus -- this is clumsy.
+        nowawareplus = self.theclass.combine(nowawareplus.date(),
+                                             timetz(nowawareplus.hour,
+                                                    nowawareplus.minute,
+                                                    nowawareplus.second,
+                                                    nowawareplus.microsecond,
+                                                    tzinfo=tzr))
+        self.failUnless(nowawareplus.tzinfo is tzr)
+        # Make sure the difference takes the timezone adjustments into account.
+        got = nowaware - nowawareplus
+        # Expected:  (nowaware base - nowaware offset) -
+        #            (nowawareplus base - nowawareplus offset) =
+        #            (nowaware base - nowawareplus base) +
+        #            (nowawareplus offset - nowaware offset) =
+        #            -delta + nowawareplus offset - nowaware offset
+        expected = timedelta(minutes=nowawareplus.utcoffset() -
+                                     nowaware.utcoffset()) - delta
+        self.assertEqual(got, expected)
+
+        # Try max possible difference.
+        min = self.theclass(1, 1, 1, tzinfo=FixedOffset(1439, "min"))
+        max = self.theclass(MAXYEAR, 12, 31, 23, 59, 59, 999999,
+                            tzinfo=FixedOffset(-1439, "max"))
+        maxdiff = max - min
+        self.assertEqual(maxdiff, self.theclass.max - self.theclass.min +
+                                  timedelta(minutes=2*1439))
+
+    def test_tzinfo_now(self):
+        meth = self.theclass.now
+        # Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
+        base = meth()
+        # Try with and without naming the keyword.
+        off42 = FixedOffset(42, "42")
+        another = meth(off42)
+        again = meth(tzinfo=off42)
+        self.failUnless(another.tzinfo is again.tzinfo)
+        self.assertEqual(another.utcoffset(), 42)
+        # Bad argument with and w/o naming the keyword.
+        self.assertRaises(TypeError, meth, 16)
+        self.assertRaises(TypeError, meth, tzinfo=16)
+        # Bad keyword name.
+        self.assertRaises(TypeError, meth, tinfo=off42)
+        # Too many args.
+        self.assertRaises(TypeError, meth, off42, off42)
+
+    def test_tzinfo_fromtimestamp(self):
+        import time
+        meth = self.theclass.fromtimestamp
+        ts = time.time()
+        # Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
+        base = meth(ts)
+        # Try with and without naming the keyword.
+        off42 = FixedOffset(42, "42")
+        another = meth(ts, off42)
+        again = meth(ts, tzinfo=off42)
+        self.failUnless(another.tzinfo is again.tzinfo)
+        self.assertEqual(another.utcoffset(), 42)
+        # Bad argument with and w/o naming the keyword.
+        self.assertRaises(TypeError, meth, ts, 16)
+        self.assertRaises(TypeError, meth, ts, tzinfo=16)
+        # Bad keyword name.
+        self.assertRaises(TypeError, meth, ts, tinfo=off42)
+        # Too many args.
+        self.assertRaises(TypeError, meth, ts, off42, off42)
+        # Too few args.
+        self.assertRaises(TypeError, meth)
+
+    def test_tzinfo_utcnow(self):
+        meth = self.theclass.utcnow
+        # Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
+        base = meth()
+        # Try with and without naming the keyword; for whatever reason,
+        # utcnow() doesn't accept a tzinfo argument.
+        off42 = FixedOffset(42, "42")
+        self.assertRaises(TypeError, meth, off42)
+        self.assertRaises(TypeError, meth, tzinfo=off42)
+
+    def test_tzinfo_utcfromtimestamp(self):
+        import time
+        meth = self.theclass.utcfromtimestamp
+        ts = time.time()
+        # Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
+        base = meth(ts)
+        # Try with and without naming the keyword; for whatever reason,
+        # utcfromtimestamp() doesn't accept a tzinfo argument.
+        off42 = FixedOffset(42, "42")
+        self.assertRaises(TypeError, meth, ts, off42)
+        self.assertRaises(TypeError, meth, ts, tzinfo=off42)
+
+    def test_tzinfo_timetuple(self):
+        # TestDateTime tested most of this.  datetimetz adds a twist to the
+        # DST flag.
+        class DST(tzinfo):
+            def __init__(self, dstvalue):
+                self.dstvalue = dstvalue
+            def dst(self, dt):
+                return self.dstvalue
+
+        cls = self.theclass
+        for dstvalue, flag in (-33, 1), (33, 1), (0, 0), (None, -1):
+            d = cls(1, 1, 1, 10, 20, 30, 40, tzinfo=DST(dstvalue))
+            t = d.timetuple()
+            self.assertEqual(1, t.tm_year)
+            self.assertEqual(1, t.tm_mon)
+            self.assertEqual(1, t.tm_mday)
+            self.assertEqual(10, t.tm_hour)
+            self.assertEqual(20, t.tm_min)
+            self.assertEqual(30, t.tm_sec)
+            self.assertEqual(0, t.tm_wday)
+            self.assertEqual(1, t.tm_yday)
+            self.assertEqual(flag, t.tm_isdst)
+
+        # dst() returns wrong type.
+        self.assertRaises(TypeError, cls(1, 1, 1, tzinfo=DST("x")).timetuple)
+
+        # dst() at the edge.
+        self.assertEqual(cls(1,1,1, tzinfo=DST(1439)).timetuple().tm_isdst, 1)
+        self.assertEqual(cls(1,1,1, tzinfo=DST(-1439)).timetuple().tm_isdst, 1)
+
+        # dst() out of range.
+        self.assertRaises(ValueError, cls(1,1,1, tzinfo=DST(1440)).timetuple)
+        self.assertRaises(ValueError, cls(1,1,1, tzinfo=DST(-1440)).timetuple)
+
+    def test_utctimetuple(self):
+        class DST(tzinfo):
+            def __init__(self, dstvalue):
+                self.dstvalue = dstvalue
+            def dst(self, dt):
+                return self.dstvalue
+
+        cls = self.theclass
+        # This can't work:  DST didn't implement utcoffset.
+        self.assertRaises(NotImplementedError,
+                          cls(1, 1, 1, tzinfo=DST(0)).utcoffset)
+
+        class UOFS(DST):
+            def __init__(self, uofs, dofs=None):
+                DST.__init__(self, dofs)
+                self.uofs = uofs
+            def utcoffset(self, dt):
+                return self.uofs
+
+        # Ensure tm_isdst is 0 regardless of what dst() says:  DST is never
+        # in effect for a UTC time.
+        for dstvalue in -33, 33, 0, None:
+            d = cls(1, 2, 3, 10, 20, 30, 40, tzinfo=UOFS(-53, dstvalue))
+            t = d.utctimetuple()
+            self.assertEqual(d.year, t.tm_year)
+            self.assertEqual(d.month, t.tm_mon)
+            self.assertEqual(d.day, t.tm_mday)
+            self.assertEqual(11, t.tm_hour) # 20mm + 53mm = 1hn + 13mm
+            self.assertEqual(13, t.tm_min)
+            self.assertEqual(d.second, t.tm_sec)
+            self.assertEqual(d.weekday(), t.tm_wday)
+            self.assertEqual(d.toordinal() - date(1, 1, 1).toordinal() + 1,
+                             t.tm_yday)
+            self.assertEqual(0, t.tm_isdst)
+
+        # At the edges, UTC adjustment can normalize into years out-of-range
+        # for a datetime object.  Ensure that a correct timetuple is
+        # created anyway.
+        tiny = cls(MINYEAR, 1, 1, 0, 0, 37, tzinfo=UOFS(1439))
+        # That goes back 1 minute less than a full day.
+        t = tiny.utctimetuple()
+        self.assertEqual(t.tm_year, MINYEAR-1)
+        self.assertEqual(t.tm_mon, 12)
+        self.assertEqual(t.tm_mday, 31)
+        self.assertEqual(t.tm_hour, 0)
+        self.assertEqual(t.tm_min, 1)
+        self.assertEqual(t.tm_sec, 37)
+        self.assertEqual(t.tm_yday, 366)    # "year 0" is a leap year
+        self.assertEqual(t.tm_isdst, 0)
+
+        huge = cls(MAXYEAR, 12, 31, 23, 59, 37, 999999, tzinfo=UOFS(-1439))
+        # That goes forward 1 minute less than a full day.
+        t = huge.utctimetuple()
+        self.assertEqual(t.tm_year, MAXYEAR+1)
+        self.assertEqual(t.tm_mon, 1)
+        self.assertEqual(t.tm_mday, 1)
+        self.assertEqual(t.tm_hour, 23)
+        self.assertEqual(t.tm_min, 58)
+        self.assertEqual(t.tm_sec, 37)
+        self.assertEqual(t.tm_yday, 1)
+        self.assertEqual(t.tm_isdst, 0)
+
+    def test_tzinfo_isoformat(self):
+        zero = FixedOffset(0, "+00:00")
+        plus = FixedOffset(220, "+03:40")
+        minus = FixedOffset(-231, "-03:51")
+        unknown = FixedOffset(None, "")
+
+        cls = self.theclass
+        datestr = '0001-02-03'
+        for ofs in None, zero, plus, minus, unknown:
+             for us in 0, 987001:
+                d = cls(1, 2, 3, 4, 5, 59, us, tzinfo=ofs)
+                timestr = '04:05:59' + (us and '.987001' or '')
+                ofsstr = ofs is not None and d.tzname() or ''
+                tailstr = timestr + ofsstr
+                iso = d.isoformat()
+                self.assertEqual(iso, datestr + 'T' + tailstr)
+                self.assertEqual(iso, d.isoformat('T'))
+                self.assertEqual(d.isoformat('k'), datestr + 'k' + tailstr)
+                self.assertEqual(str(d), datestr + ' ' + tailstr)
+
+
+def suite():
+    allsuites = [unittest.makeSuite(klass, 'test')
+                 for klass in (TestModule,
+                               TestTZInfo,
+                               TestTimeDelta,
+                               TestDateOnly,
+                               TestDate,
+                               TestDateTime,
+                               TestTime,
+                               TestTimeTZ,
+                               TestDateTimeTZ,
+                              )
+                ]
+    return unittest.TestSuite(allsuites)
+
+def test_main():
+    import gc
+    import sys
+
+    thesuite = suite()
+    lastrc = None
+    while True:
+        test_support.run_suite(thesuite)
+        if 1:       # change to 0, under a debug build, for some leak detection
+            break
+        gc.collect()
+        if gc.garbage:
+            raise SystemError("gc.garbage not empty after test run: %r" %
+                              gc.garbage)
+        if hasattr(sys, 'gettotalrefcount'):
+            thisrc = sys.gettotalrefcount()
+            print >> sys.stderr, '*' * 10, 'total refs:', thisrc,
+            if lastrc:
+                print >> sys.stderr, 'delta:', thisrc - lastrc
+            else:
+                print >> sys.stderr
+            lastrc = thisrc
+
+if __name__ == "__main__":
+    test_main()