from test.support import verbose, TestFailed import locale import sys import test.support as support import unittest maxsize = 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("{!a} % {!a} =? {!a} ...".format(formatstr, args, output), end=' ') else: print("{!a} % {!a} works? ...".format(formatstr, args), end=' ') 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') class FormatTest(unittest.TestCase): def test_format(self): testformat("%.1d", (1,), "1") testformat("%.*d", (sys.maxsize,1), overflowok=True) # expect overflow testformat("%.100d", (1,), '00000000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '00000001', overflowok=True) testformat("%#.117x", (1,), '0x00000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '0000000000000000000000000001', overflowok=True) testformat("%#.118x", (1,), '0x00000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '00000000000000000000000000001', overflowok=True) testformat("%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 testformat("%#.*g", (109, -1.e+49/3.)) testformat("%#.*g", (110, -1.e+49/3.)) testformat("%#.*g", (110, -1.e+100/3.)) # test some ridiculously large precision, expect overflow testformat('%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. testformat("%#.*g", (110, -1.e+100/3.)) testformat("%#.*G", (110, -1.e+100/3.)) testformat("%#.*f", (110, -1.e+100/3.)) testformat("%#.*F", (110, -1.e+100/3.)) # Formatting of integers. Overflow is not ok testformat("%x", 10, "a") testformat("%x", 100000000000, "174876e800") testformat("%o", 10, "12") testformat("%o", 100000000000, "1351035564000") testformat("%d", 10, "10") testformat("%d", 100000000000, "100000000000") big = 123456789012345678901234567890 testformat("%d", big, "123456789012345678901234567890") testformat("%d", -big, "-123456789012345678901234567890") testformat("%5d", -big, "-123456789012345678901234567890") testformat("%31d", -big, "-123456789012345678901234567890") testformat("%32d", -big, " -123456789012345678901234567890") testformat("%-32d", -big, "-123456789012345678901234567890 ") testformat("%032d", -big, "-0123456789012345678901234567890") testformat("%-032d", -big, "-123456789012345678901234567890 ") testformat("%034d", -big, "-000123456789012345678901234567890") testformat("%034d", big, "0000123456789012345678901234567890") testformat("%0+34d", big, "+000123456789012345678901234567890") testformat("%+34d", big, " +123456789012345678901234567890") testformat("%34d", big, " 123456789012345678901234567890") testformat("%.2d", big, "123456789012345678901234567890") testformat("%.30d", big, "123456789012345678901234567890") testformat("%.31d", big, "0123456789012345678901234567890") testformat("%32.31d", big, " 0123456789012345678901234567890") testformat("%d", float(big), "123456________________________", 6) big = 0x1234567890abcdef12345 # 21 hex digits testformat("%x", big, "1234567890abcdef12345") testformat("%x", -big, "-1234567890abcdef12345") testformat("%5x", -big, "-1234567890abcdef12345") testformat("%22x", -big, "-1234567890abcdef12345") testformat("%23x", -big, " -1234567890abcdef12345") testformat("%-23x", -big, "-1234567890abcdef12345 ") testformat("%023x", -big, "-01234567890abcdef12345") testformat("%-023x", -big, "-1234567890abcdef12345 ") testformat("%025x", -big, "-0001234567890abcdef12345") testformat("%025x", big, "00001234567890abcdef12345") testformat("%0+25x", big, "+0001234567890abcdef12345") testformat("%+25x", big, " +1234567890abcdef12345") testformat("%25x", big, " 1234567890abcdef12345") testformat("%.2x", big, "1234567890abcdef12345") testformat("%.21x", big, "1234567890abcdef12345") testformat("%.22x", big, "01234567890abcdef12345") testformat("%23.22x", big, " 01234567890abcdef12345") testformat("%-23.22x", big, "01234567890abcdef12345 ") testformat("%X", big, "1234567890ABCDEF12345") testformat("%#X", big, "0X1234567890ABCDEF12345") testformat("%#x", big, "0x1234567890abcdef12345") testformat("%#x", -big, "-0x1234567890abcdef12345") testformat("%#.23x", -big, "-0x001234567890abcdef12345") testformat("%#+.23x", big, "+0x001234567890abcdef12345") testformat("%# .23x", big, " 0x001234567890abcdef12345") testformat("%#+.23X", big, "+0X001234567890ABCDEF12345") testformat("%#-+.23X", big, "+0X001234567890ABCDEF12345") testformat("%#-+26.23X", big, "+0X001234567890ABCDEF12345") testformat("%#-+27.23X", big, "+0X001234567890ABCDEF12345 ") testformat("%#+27.23X", big, " +0X001234567890ABCDEF12345") # next one gets two leading zeroes from precision, and another from the # 0 flag and the width testformat("%#+027.23X", big, "+0X0001234567890ABCDEF12345") # same, except no 0 flag testformat("%#+27.23X", big, " +0X001234567890ABCDEF12345") testformat("%x", float(big), "123456_______________", 6) big = 0o12345670123456701234567012345670 # 32 octal digits testformat("%o", big, "12345670123456701234567012345670") testformat("%o", -big, "-12345670123456701234567012345670") testformat("%5o", -big, "-12345670123456701234567012345670") testformat("%33o", -big, "-12345670123456701234567012345670") testformat("%34o", -big, " -12345670123456701234567012345670") testformat("%-34o", -big, "-12345670123456701234567012345670 ") testformat("%034o", -big, "-012345670123456701234567012345670") testformat("%-034o", -big, "-12345670123456701234567012345670 ") testformat("%036o", -big, "-00012345670123456701234567012345670") testformat("%036o", big, "000012345670123456701234567012345670") testformat("%0+36o", big, "+00012345670123456701234567012345670") testformat("%+36o", big, " +12345670123456701234567012345670") testformat("%36o", big, " 12345670123456701234567012345670") testformat("%.2o", big, "12345670123456701234567012345670") testformat("%.32o", big, "12345670123456701234567012345670") testformat("%.33o", big, "012345670123456701234567012345670") testformat("%34.33o", big, " 012345670123456701234567012345670") testformat("%-34.33o", big, "012345670123456701234567012345670 ") testformat("%o", big, "12345670123456701234567012345670") testformat("%#o", big, "0o12345670123456701234567012345670") testformat("%#o", -big, "-0o12345670123456701234567012345670") testformat("%#.34o", -big, "-0o0012345670123456701234567012345670") testformat("%#+.34o", big, "+0o0012345670123456701234567012345670") testformat("%# .34o", big, " 0o0012345670123456701234567012345670") testformat("%#+.34o", big, "+0o0012345670123456701234567012345670") testformat("%#-+.34o", big, "+0o0012345670123456701234567012345670") testformat("%#-+37.34o", big, "+0o0012345670123456701234567012345670") testformat("%#+37.34o", big, "+0o0012345670123456701234567012345670") # next one gets one leading zero from precision testformat("%.33o", big, "012345670123456701234567012345670") # base marker shouldn't change that, since "0" is redundant testformat("%#.33o", big, "0o012345670123456701234567012345670") # but reduce precision, and base marker should add a zero testformat("%#.32o", big, "0o12345670123456701234567012345670") # one leading zero from precision, and another from "0" flag & width testformat("%034.33o", big, "0012345670123456701234567012345670") # base marker shouldn't change that testformat("%0#34.33o", big, "0o012345670123456701234567012345670") testformat("%o", float(big), "123456__________________________", 6) # Some small ints, in both Python int and flavors). testformat("%d", 42, "42") testformat("%d", -42, "-42") testformat("%d", 42, "42") testformat("%d", -42, "-42") testformat("%d", 42.0, "42") testformat("%#x", 1, "0x1") testformat("%#x", 1, "0x1") testformat("%#X", 1, "0X1") testformat("%#X", 1, "0X1") testformat("%#x", 1.0, "0x1") testformat("%#o", 1, "0o1") testformat("%#o", 1, "0o1") testformat("%#o", 0, "0o0") testformat("%#o", 0, "0o0") testformat("%o", 0, "0") testformat("%o", 0, "0") testformat("%d", 0, "0") testformat("%d", 0, "0") testformat("%#x", 0, "0x0") testformat("%#x", 0, "0x0") testformat("%#X", 0, "0X0") testformat("%#X", 0, "0X0") testformat("%x", 0x42, "42") testformat("%x", -0x42, "-42") testformat("%x", 0x42, "42") testformat("%x", -0x42, "-42") testformat("%x", float(0x42), "42") testformat("%o", 0o42, "42") testformat("%o", -0o42, "-42") testformat("%o", 0o42, "42") testformat("%o", -0o42, "-42") testformat("%o", float(0o42), "42") testformat("%r", "\u0378", "'\\u0378'") # non printable testformat("%a", "\u0378", "'\\u0378'") # non printable testformat("%r", "\u0374", "'\u0374'") # printable testformat("%a", "\u0374", "'\\u0374'") # printable # alternate float formatting testformat('%g', 1.1, '1.1') testformat('%#g', 1.1, '1.10000') # Test exception for unknown format characters if verbose: print('Testing exceptions') def test_exc(formatstr, args, exception, excmsg): try: testformat(formatstr, args) except exception as 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 %b', 1, ValueError, "unsupported format character 'b' (0x62) at index 5") #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, "a float is required") test_exc('no format', '1', TypeError, "not all arguments converted during string formatting") test_exc('no format', '1', TypeError, "not all arguments converted during string formatting") 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_non_ascii(self): testformat("\u20ac=%f", (1.0,), "\u20ac=1.000000") self.assertEqual(format("abc", "\u2007<5"), "abc\u2007\u2007") self.assertEqual(format(123, "\u2007<5"), "123\u2007\u2007") self.assertEqual(format(12.3, "\u2007<6"), "12.3\u2007\u2007") self.assertEqual(format(0j, "\u2007<4"), "0j\u2007\u2007") self.assertEqual(format(1+2j, "\u2007<8"), "(1+2j)\u2007\u2007") self.assertEqual(format("abc", "\u2007>5"), "\u2007\u2007abc") self.assertEqual(format(123, "\u2007>5"), "\u2007\u2007123") self.assertEqual(format(12.3, "\u2007>6"), "\u2007\u200712.3") self.assertEqual(format(1+2j, "\u2007>8"), "\u2007\u2007(1+2j)") self.assertEqual(format(0j, "\u2007>4"), "\u2007\u20070j") self.assertEqual(format("abc", "\u2007^5"), "\u2007abc\u2007") self.assertEqual(format(123, "\u2007^5"), "\u2007123\u2007") self.assertEqual(format(12.3, "\u2007^6"), "\u200712.3\u2007") self.assertEqual(format(1+2j, "\u2007^8"), "\u2007(1+2j)\u2007") self.assertEqual(format(0j, "\u2007^4"), "\u20070j\u2007") def test_locale(self): try: oldloc = locale.setlocale(locale.LC_ALL) locale.setlocale(locale.LC_ALL, '') except locale.Error as err: self.skipTest("Cannot set locale: {}".format(err)) try: localeconv = locale.localeconv() sep = localeconv['thousands_sep'] point = localeconv['decimal_point'] text = format(123456789, "n") self.assertIn(sep, text) self.assertEqual(text.replace(sep, ''), '123456789') text = format(1234.5, "n") self.assertIn(sep, text) self.assertIn(point, text) self.assertEqual(text.replace(sep, ''), '1234' + point + '5') finally: locale.setlocale(locale.LC_ALL, oldloc) @support.cpython_only def test_optimisations(self): text = "abcde" # 5 characters self.assertIs("%s" % text, text) self.assertIs("%.5s" % text, text) self.assertIs("%.10s" % text, text) self.assertIs("%1s" % text, text) self.assertIs("%5s" % text, text) self.assertIs("{0}".format(text), text) self.assertIs("{0:s}".format(text), text) self.assertIs("{0:.5s}".format(text), text) self.assertIs("{0:.10s}".format(text), text) self.assertIs("{0:1s}".format(text), text) self.assertIs("{0:5s}".format(text), text) self.assertIs(text % (), text) self.assertIs(text.format(), text) def test_main(): support.run_unittest(FormatTest) def test_precision(self): INT_MAX = 2147483647 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" % (INT_MAX + 1)) self.assertEqual(str(cm.exception), "precision too big") c = complex(f) self.assertEqual(format(f, ".0f"), "1") self.assertEqual(format(f, ".3f"), "1.200") with self.assertRaises(ValueError) as cm: format(f, ".%sf" % (INT_MAX + 1)) self.assertEqual(str(cm.exception), "precision too big") if __name__ == "__main__": unittest.main()