import sys from test.test_support import verbose, have_unicode, TestFailed import test.test_support as test_support import unittest maxsize = test_support.MAX_Py_ssize_t # test string formatting operator (I am not sure if this is being tested # elsewhere but, surely, some of the given cases are *not* tested because # they crash python) # test on unicode strings as well def testformat(formatstr, args, output=None, limit=None, overflowok=False): if verbose: if output: print "%s %% %s =? %s ..." %\ (repr(formatstr), repr(args), repr(output)), else: print "%s %% %s works? ..." % (repr(formatstr), repr(args)), try: result = formatstr % args except OverflowError: if not overflowok: raise if verbose: print 'overflow (this is fine)' else: if output and limit is None and result != output: if verbose: print 'no' raise AssertionError("%r %% %r == %r != %r" % (formatstr, args, result, output)) # when 'limit' is specified, it determines how many characters # must match exactly; lengths must always match. # ex: limit=5, '12345678' matches '12345___' # (mainly for floating point format tests for which an exact match # can't be guaranteed due to rounding and representation errors) elif output and limit is not None and ( len(result)!=len(output) or result[:limit]!=output[:limit]): if verbose: print 'no' print "%s %% %s == %s != %s" % \ (repr(formatstr), repr(args), repr(result), repr(output)) else: if verbose: print 'yes' def testboth(formatstr, *args, **kwargs): testformat(formatstr, *args, **kwargs) if have_unicode: testformat(unicode(formatstr), *args, **kwargs) class FormatTest(unittest.TestCase): def test_format(self): testboth("%.1d", (1,), "1") testboth("%.*d", (sys.maxint,1), overflowok=True) # expect overflow testboth("%.100d", (1,), '00000000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '00000001', overflowok=True) testboth("%#.117x", (1,), '0x00000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '0000000000000000000000000001', overflowok=True) testboth("%#.118x", (1,), '0x00000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '00000000000000000000000000001', overflowok=True) testboth("%f", (1.0,), "1.000000") # these are trying to test the limits of the internal magic-number-length # formatting buffer, if that number changes then these tests are less # effective testboth("%#.*g", (109, -1.e+49/3.)) testboth("%#.*g", (110, -1.e+49/3.)) testboth("%#.*g", (110, -1.e+100/3.)) # test some ridiculously large precision, expect overflow testboth('%12.*f', (123456, 1.0)) # check for internal overflow validation on length of precision # these tests should no longer cause overflow in Python # 2.7/3.1 and later. testboth("%#.*g", (110, -1.e+100/3.)) testboth("%#.*G", (110, -1.e+100/3.)) testboth("%#.*f", (110, -1.e+100/3.)) testboth("%#.*F", (110, -1.e+100/3.)) # Formatting of long integers. Overflow is not ok testboth("%x", 10L, "a") testboth("%x", 100000000000L, "174876e800") testboth("%o", 10L, "12") testboth("%o", 100000000000L, "1351035564000") testboth("%d", 10L, "10") testboth("%d", 100000000000L, "100000000000") big = 123456789012345678901234567890L testboth("%d", big, "123456789012345678901234567890") testboth("%d", -big, "-123456789012345678901234567890") testboth("%5d", -big, "-123456789012345678901234567890") testboth("%31d", -big, "-123456789012345678901234567890") testboth("%32d", -big, " -123456789012345678901234567890") testboth("%-32d", -big, "-123456789012345678901234567890 ") testboth("%032d", -big, "-0123456789012345678901234567890") testboth("%-032d", -big, "-123456789012345678901234567890 ") testboth("%034d", -big, "-000123456789012345678901234567890") testboth("%034d", big, "0000123456789012345678901234567890") testboth("%0+34d", big, "+000123456789012345678901234567890") testboth("%+34d", big, " +123456789012345678901234567890") testboth("%34d", big, " 123456789012345678901234567890") testboth("%.2d", big, "123456789012345678901234567890") testboth("%.30d", big, "123456789012345678901234567890") testboth("%.31d", big, "0123456789012345678901234567890") testboth("%32.31d", big, " 0123456789012345678901234567890") testboth("%d", float(big), "123456________________________", 6) big = 0x1234567890abcdef12345L # 21 hex digits testboth("%x", big, "1234567890abcdef12345") testboth("%x", -big, "-1234567890abcdef12345") testboth("%5x", -big, "-1234567890abcdef12345") testboth("%22x", -big, "-1234567890abcdef12345") testboth("%23x", -big, " -1234567890abcdef12345") testboth("%-23x", -big, "-1234567890abcdef12345 ") testboth("%023x", -big, "-01234567890abcdef12345") testboth("%-023x", -big, "-1234567890abcdef12345 ") testboth("%025x", -big, "-0001234567890abcdef12345") testboth("%025x", big, "00001234567890abcdef12345") testboth("%0+25x", big, "+0001234567890abcdef12345") testboth("%+25x", big, " +1234567890abcdef12345") testboth("%25x", big, " 1234567890abcdef12345") testboth("%.2x", big, "1234567890abcdef12345") testboth("%.21x", big, "1234567890abcdef12345") testboth("%.22x", big, "01234567890abcdef12345") testboth("%23.22x", big, " 01234567890abcdef12345") testboth("%-23.22x", big, "01234567890abcdef12345 ") testboth("%X", big, "1234567890ABCDEF12345") testboth("%#X", big, "0X1234567890ABCDEF12345") testboth("%#x", big, "0x1234567890abcdef12345") testboth("%#x", -big, "-0x1234567890abcdef12345") testboth("%#.23x", -big, "-0x001234567890abcdef12345") testboth("%#+.23x", big, "+0x001234567890abcdef12345") testboth("%# .23x", big, " 0x001234567890abcdef12345") testboth("%#+.23X", big, "+0X001234567890ABCDEF12345") testboth("%#-+.23X", big, "+0X001234567890ABCDEF12345") testboth("%#-+26.23X", big, "+0X001234567890ABCDEF12345") testboth("%#-+27.23X", big, "+0X001234567890ABCDEF12345 ") testboth("%#+27.23X", big, " +0X001234567890ABCDEF12345") # next one gets two leading zeroes from precision, and another from the # 0 flag and the width testboth("%#+027.23X", big, "+0X0001234567890ABCDEF12345") # same, except no 0 flag testboth("%#+27.23X", big, " +0X001234567890ABCDEF12345") testboth("%x", float(big), "123456_______________", 6) big = 012345670123456701234567012345670L # 32 octal digits testboth("%o", big, "12345670123456701234567012345670") testboth("%o", -big, "-12345670123456701234567012345670") testboth("%5o", -big, "-12345670123456701234567012345670") testboth("%33o", -big, "-12345670123456701234567012345670") testboth("%34o", -big, " -12345670123456701234567012345670") testboth("%-34o", -big, "-12345670123456701234567012345670 ") testboth("%034o", -big, "-012345670123456701234567012345670") testboth("%-034o", -big, "-12345670123456701234567012345670 ") testboth("%036o", -big, "-00012345670123456701234567012345670") testboth("%036o", big, "000012345670123456701234567012345670") testboth("%0+36o", big, "+00012345670123456701234567012345670") testboth("%+36o", big, " +12345670123456701234567012345670") testboth("%36o", big, " 12345670123456701234567012345670") testboth("%.2o", big, "12345670123456701234567012345670") testboth("%.32o", big, "12345670123456701234567012345670") testboth("%.33o", big, "012345670123456701234567012345670") testboth("%34.33o", big, " 012345670123456701234567012345670") testboth("%-34.33o", big, "012345670123456701234567012345670 ") testboth("%o", big, "12345670123456701234567012345670") testboth("%#o", big, "012345670123456701234567012345670") testboth("%#o", -big, "-012345670123456701234567012345670") testboth("%#.34o", -big, "-0012345670123456701234567012345670") testboth("%#+.34o", big, "+0012345670123456701234567012345670") testboth("%# .34o", big, " 0012345670123456701234567012345670") testboth("%#+.34o", big, "+0012345670123456701234567012345670") testboth("%#-+.34o", big, "+0012345670123456701234567012345670") testboth("%#-+37.34o", big, "+0012345670123456701234567012345670 ") testboth("%#+37.34o", big, " +0012345670123456701234567012345670") # next one gets one leading zero from precision testboth("%.33o", big, "012345670123456701234567012345670") # base marker shouldn't change that, since "0" is redundant testboth("%#.33o", big, "012345670123456701234567012345670") # but reduce precision, and base marker should add a zero testboth("%#.32o", big, "012345670123456701234567012345670") # one leading zero from precision, and another from "0" flag & width testboth("%034.33o", big, "0012345670123456701234567012345670") # base marker shouldn't change that testboth("%0#34.33o", big, "0012345670123456701234567012345670") testboth("%o", float(big), "123456__________________________", 6) # Some small ints, in both Python int and long flavors). testboth("%d", 42, "42") testboth("%d", -42, "-42") testboth("%d", 42L, "42") testboth("%d", -42L, "-42") testboth("%d", 42.0, "42") testboth("%#x", 1, "0x1") testboth("%#x", 1L, "0x1") testboth("%#X", 1, "0X1") testboth("%#X", 1L, "0X1") testboth("%#x", 1.0, "0x1") testboth("%#o", 1, "01") testboth("%#o", 1L, "01") testboth("%#o", 0, "0") testboth("%#o", 0L, "0") testboth("%o", 0, "0") testboth("%o", 0L, "0") testboth("%d", 0, "0") testboth("%d", 0L, "0") testboth("%#x", 0, "0x0") testboth("%#x", 0L, "0x0") testboth("%#X", 0, "0X0") testboth("%#X", 0L, "0X0") testboth("%x", 0x42, "42") testboth("%x", -0x42, "-42") testboth("%x", 0x42L, "42") testboth("%x", -0x42L, "-42") testboth("%x", float(0x42), "42") testboth("%o", 042, "42") testboth("%o", -042, "-42") testboth("%o", 042L, "42") testboth("%o", -042L, "-42") testboth("%o", float(042), "42") # alternate float formatting testformat('%g', 1.1, '1.1') testformat('%#g', 1.1, '1.10000') # Regression test for http://bugs.python.org/issue15516. class IntFails(object): def __int__(self): raise TestFailed def __long__(self): return 0 fst = IntFails() testformat("%x", fst, '0') testformat(u"%x", fst, '0') # Test exception for unknown format characters if verbose: print 'Testing exceptions' def test_exc(formatstr, args, exception, excmsg): try: testformat(formatstr, args) except exception, exc: if str(exc) == excmsg: if verbose: print "yes" else: if verbose: print 'no' print 'Unexpected ', exception, ':', repr(str(exc)) except: if verbose: print 'no' print 'Unexpected exception' raise else: raise TestFailed, 'did not get expected exception: %s' % excmsg test_exc('abc %a', 1, ValueError, "unsupported format character 'a' (0x61) at index 5") if have_unicode: test_exc(unicode('abc %\u3000','raw-unicode-escape'), 1, ValueError, "unsupported format character '?' (0x3000) at index 5") test_exc('%d', '1', TypeError, "%d format: a number is required, not str") test_exc('%g', '1', TypeError, "float argument required, not str") test_exc('no format', '1', TypeError, "not all arguments converted during string formatting") test_exc('no format', u'1', TypeError, "not all arguments converted during string formatting") test_exc(u'no format', '1', TypeError, "not all arguments converted during string formatting") test_exc(u'no format', u'1', TypeError, "not all arguments converted during string formatting") class Foobar(long): def __oct__(self): # Returning a non-string should not blow up. return self + 1 test_exc('%o', Foobar(), TypeError, "expected string or Unicode object, long found") if maxsize == 2**31-1: # crashes 2.2.1 and earlier: try: "%*d"%(maxsize, -127) except MemoryError: pass else: raise TestFailed, '"%*d"%(maxsize, -127) should fail' def test_main(): test_support.run_unittest(FormatTest) def test_precision(self): f = 1.2 self.assertEqual(format(f, ".0f"), "1") self.assertEqual(format(f, ".3f"), "1.200") with self.assertRaises(ValueError) as cm: format(f, ".%sf" % (sys.maxsize + 1)) self.assertEqual(str(cm.exception), "precision too big") c = complex(f) self.assertEqual(format(c, ".0f"), "1+0j") self.assertEqual(format(c, ".3f"), "1.200+0.000j") with self.assertRaises(ValueError) as cm: format(c, ".%sf" % (sys.maxsize + 1)) self.assertEqual(str(cm.exception), "precision too big") @test_support.cpython_only def test_precision_c_limits(self): from _testcapi import INT_MAX f = 1.2 with self.assertRaises(ValueError) as cm: format(f, ".%sf" % (INT_MAX + 1)) c = complex(f) with self.assertRaises(ValueError) as cm: format(c, ".%sf" % (INT_MAX + 1)) if __name__ == "__main__": unittest.main()