/Lib/test/test_format.py
Python | 295 lines | 239 code | 29 blank | 27 comment | 25 complexity | eea3c9ca6c3ee6debf5bec026b84d347 MD5 | raw file
1import sys 2from test.test_support import verbose, have_unicode, TestFailed 3import test.test_support as test_support 4import unittest 5 6maxsize = test_support.MAX_Py_ssize_t 7 8# test string formatting operator (I am not sure if this is being tested 9# elsewhere but, surely, some of the given cases are *not* tested because 10# they crash python) 11# test on unicode strings as well 12 13overflowok = 1 14overflowrequired = 0 15 16 17def testformat(formatstr, args, output=None, limit=None): 18 if verbose: 19 if output: 20 print "%s %% %s =? %s ..." %\ 21 (repr(formatstr), repr(args), repr(output)), 22 else: 23 print "%s %% %s works? ..." % (repr(formatstr), repr(args)), 24 try: 25 result = formatstr % args 26 except OverflowError: 27 if not overflowok: 28 raise 29 if verbose: 30 print 'overflow (this is fine)' 31 else: 32 if overflowrequired: 33 if verbose: 34 print 'no' 35 print "overflow expected on %s %% %s" % \ 36 (repr(formatstr), repr(args)) 37 elif output and limit is None and result != output: 38 if verbose: 39 print 'no' 40 print "%s %% %s == %s != %s" % \ 41 (repr(formatstr), repr(args), repr(result), repr(output)) 42 # when 'limit' is specified, it determines how many characters 43 # must match exactly; lengths must always match. 44 # ex: limit=5, '12345678' matches '12345___' 45 # (mainly for floating point format tests for which an exact match 46 # can't be guaranteed due to rounding and representation errors) 47 elif output and limit is not None and ( 48 len(result)!=len(output) or result[:limit]!=output[:limit]): 49 if verbose: 50 print 'no' 51 print "%s %% %s == %s != %s" % \ 52 (repr(formatstr), repr(args), repr(result), repr(output)) 53 else: 54 if verbose: 55 print 'yes' 56 57 58def testboth(formatstr, *args): 59 testformat(formatstr, *args) 60 if have_unicode: 61 testformat(unicode(formatstr), *args) 62 63 64class FormatTest(unittest.TestCase): 65 def test_format(self): 66 testboth("%.1d", (1,), "1") 67 testboth("%.*d", (sys.maxint,1)) # expect overflow 68 testboth("%.100d", (1,), '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001') 69 testboth("%#.117x", (1,), '0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001') 70 testboth("%#.118x", (1,), '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001') 71 72 testboth("%f", (1.0,), "1.000000") 73 # these are trying to test the limits of the internal magic-number-length 74 # formatting buffer, if that number changes then these tests are less 75 # effective 76 testboth("%#.*g", (109, -1.e+49/3.)) 77 testboth("%#.*g", (110, -1.e+49/3.)) 78 testboth("%#.*g", (110, -1.e+100/3.)) 79 80 # test some ridiculously large precision, expect overflow 81 testboth('%12.*f', (123456, 1.0)) 82 83 # check for internal overflow validation on length of precision 84 overflowrequired = 1 85 testboth("%#.*g", (110, -1.e+100/3.)) 86 testboth("%#.*G", (110, -1.e+100/3.)) 87 testboth("%#.*f", (110, -1.e+100/3.)) 88 testboth("%#.*F", (110, -1.e+100/3.)) 89 overflowrequired = 0 90 91 # Formatting of long integers. Overflow is not ok 92 overflowok = 0 93 testboth("%x", 10L, "a") 94 testboth("%x", 100000000000L, "174876e800") 95 testboth("%o", 10L, "12") 96 testboth("%o", 100000000000L, "1351035564000") 97 testboth("%d", 10L, "10") 98 testboth("%d", 100000000000L, "100000000000") 99 100 big = 123456789012345678901234567890L 101 testboth("%d", big, "123456789012345678901234567890") 102 testboth("%d", -big, "-123456789012345678901234567890") 103 testboth("%5d", -big, "-123456789012345678901234567890") 104 testboth("%31d", -big, "-123456789012345678901234567890") 105 testboth("%32d", -big, " -123456789012345678901234567890") 106 testboth("%-32d", -big, "-123456789012345678901234567890 ") 107 testboth("%032d", -big, "-0123456789012345678901234567890") 108 testboth("%-032d", -big, "-123456789012345678901234567890 ") 109 testboth("%034d", -big, "-000123456789012345678901234567890") 110 testboth("%034d", big, "0000123456789012345678901234567890") 111 testboth("%0+34d", big, "+000123456789012345678901234567890") 112 testboth("%+34d", big, " +123456789012345678901234567890") 113 testboth("%34d", big, " 123456789012345678901234567890") 114 testboth("%.2d", big, "123456789012345678901234567890") 115 testboth("%.30d", big, "123456789012345678901234567890") 116 testboth("%.31d", big, "0123456789012345678901234567890") 117 testboth("%32.31d", big, " 0123456789012345678901234567890") 118 testboth("%d", float(big), "123456________________________", 6) 119 120 big = 0x1234567890abcdef12345L # 21 hex digits 121 testboth("%x", big, "1234567890abcdef12345") 122 testboth("%x", -big, "-1234567890abcdef12345") 123 testboth("%5x", -big, "-1234567890abcdef12345") 124 testboth("%22x", -big, "-1234567890abcdef12345") 125 testboth("%23x", -big, " -1234567890abcdef12345") 126 testboth("%-23x", -big, "-1234567890abcdef12345 ") 127 testboth("%023x", -big, "-01234567890abcdef12345") 128 testboth("%-023x", -big, "-1234567890abcdef12345 ") 129 testboth("%025x", -big, "-0001234567890abcdef12345") 130 testboth("%025x", big, "00001234567890abcdef12345") 131 testboth("%0+25x", big, "+0001234567890abcdef12345") 132 testboth("%+25x", big, " +1234567890abcdef12345") 133 testboth("%25x", big, " 1234567890abcdef12345") 134 testboth("%.2x", big, "1234567890abcdef12345") 135 testboth("%.21x", big, "1234567890abcdef12345") 136 testboth("%.22x", big, "01234567890abcdef12345") 137 testboth("%23.22x", big, " 01234567890abcdef12345") 138 testboth("%-23.22x", big, "01234567890abcdef12345 ") 139 testboth("%X", big, "1234567890ABCDEF12345") 140 testboth("%#X", big, "0X1234567890ABCDEF12345") 141 testboth("%#x", big, "0x1234567890abcdef12345") 142 testboth("%#x", -big, "-0x1234567890abcdef12345") 143 testboth("%#.23x", -big, "-0x001234567890abcdef12345") 144 testboth("%#+.23x", big, "+0x001234567890abcdef12345") 145 testboth("%# .23x", big, " 0x001234567890abcdef12345") 146 testboth("%#+.23X", big, "+0X001234567890ABCDEF12345") 147 testboth("%#-+.23X", big, "+0X001234567890ABCDEF12345") 148 testboth("%#-+26.23X", big, "+0X001234567890ABCDEF12345") 149 testboth("%#-+27.23X", big, "+0X001234567890ABCDEF12345 ") 150 testboth("%#+27.23X", big, " +0X001234567890ABCDEF12345") 151 # next one gets two leading zeroes from precision, and another from the 152 # 0 flag and the width 153 testboth("%#+027.23X", big, "+0X0001234567890ABCDEF12345") 154 # same, except no 0 flag 155 testboth("%#+27.23X", big, " +0X001234567890ABCDEF12345") 156 testboth("%x", float(big), "123456_______________", 6) 157 158 big = 012345670123456701234567012345670L # 32 octal digits 159 testboth("%o", big, "12345670123456701234567012345670") 160 testboth("%o", -big, "-12345670123456701234567012345670") 161 testboth("%5o", -big, "-12345670123456701234567012345670") 162 testboth("%33o", -big, "-12345670123456701234567012345670") 163 testboth("%34o", -big, " -12345670123456701234567012345670") 164 testboth("%-34o", -big, "-12345670123456701234567012345670 ") 165 testboth("%034o", -big, "-012345670123456701234567012345670") 166 testboth("%-034o", -big, "-12345670123456701234567012345670 ") 167 testboth("%036o", -big, "-00012345670123456701234567012345670") 168 testboth("%036o", big, "000012345670123456701234567012345670") 169 testboth("%0+36o", big, "+00012345670123456701234567012345670") 170 testboth("%+36o", big, " +12345670123456701234567012345670") 171 testboth("%36o", big, " 12345670123456701234567012345670") 172 testboth("%.2o", big, "12345670123456701234567012345670") 173 testboth("%.32o", big, "12345670123456701234567012345670") 174 testboth("%.33o", big, "012345670123456701234567012345670") 175 testboth("%34.33o", big, " 012345670123456701234567012345670") 176 testboth("%-34.33o", big, "012345670123456701234567012345670 ") 177 testboth("%o", big, "12345670123456701234567012345670") 178 testboth("%#o", big, "012345670123456701234567012345670") 179 testboth("%#o", -big, "-012345670123456701234567012345670") 180 testboth("%#.34o", -big, "-0012345670123456701234567012345670") 181 testboth("%#+.34o", big, "+0012345670123456701234567012345670") 182 testboth("%# .34o", big, " 0012345670123456701234567012345670") 183 testboth("%#+.34o", big, "+0012345670123456701234567012345670") 184 testboth("%#-+.34o", big, "+0012345670123456701234567012345670") 185 testboth("%#-+37.34o", big, "+0012345670123456701234567012345670 ") 186 testboth("%#+37.34o", big, " +0012345670123456701234567012345670") 187 # next one gets one leading zero from precision 188 testboth("%.33o", big, "012345670123456701234567012345670") 189 # base marker shouldn't change that, since "0" is redundant 190 testboth("%#.33o", big, "012345670123456701234567012345670") 191 # but reduce precision, and base marker should add a zero 192 testboth("%#.32o", big, "012345670123456701234567012345670") 193 # one leading zero from precision, and another from "0" flag & width 194 testboth("%034.33o", big, "0012345670123456701234567012345670") 195 # base marker shouldn't change that 196 testboth("%0#34.33o", big, "0012345670123456701234567012345670") 197 testboth("%o", float(big), "123456__________________________", 6) 198 199 # Some small ints, in both Python int and long flavors). 200 testboth("%d", 42, "42") 201 testboth("%d", -42, "-42") 202 testboth("%d", 42L, "42") 203 testboth("%d", -42L, "-42") 204 testboth("%d", 42.0, "42") 205 testboth("%#x", 1, "0x1") 206 testboth("%#x", 1L, "0x1") 207 testboth("%#X", 1, "0X1") 208 testboth("%#X", 1L, "0X1") 209 testboth("%#x", 1.0, "0x1") 210 testboth("%#o", 1, "01") 211 testboth("%#o", 1L, "01") 212 testboth("%#o", 0, "0") 213 testboth("%#o", 0L, "0") 214 testboth("%o", 0, "0") 215 testboth("%o", 0L, "0") 216 testboth("%d", 0, "0") 217 testboth("%d", 0L, "0") 218 testboth("%#x", 0, "0x0") 219 testboth("%#x", 0L, "0x0") 220 testboth("%#X", 0, "0X0") 221 testboth("%#X", 0L, "0X0") 222 223 testboth("%x", 0x42, "42") 224 testboth("%x", -0x42, "-42") 225 testboth("%x", 0x42L, "42") 226 testboth("%x", -0x42L, "-42") 227 testboth("%x", float(0x42), "42") 228 229 testboth("%o", 042, "42") 230 testboth("%o", -042, "-42") 231 testboth("%o", 042L, "42") 232 testboth("%o", -042L, "-42") 233 testboth("%o", float(042), "42") 234 235 # Test exception for unknown format characters 236 if verbose: 237 print 'Testing exceptions' 238 239 def test_exc(formatstr, args, exception, excmsg): 240 try: 241 testformat(formatstr, args) 242 except exception, exc: 243 if str(exc) == excmsg: 244 if verbose: 245 print "yes" 246 else: 247 if verbose: print 'no' 248 print 'Unexpected ', exception, ':', repr(str(exc)) 249 except: 250 if verbose: print 'no' 251 print 'Unexpected exception' 252 raise 253 else: 254 raise TestFailed, 'did not get expected exception: %s' % excmsg 255 256 test_exc('abc %a', 1, ValueError, 257 "unsupported format character 'a' (0x61) at index 5") 258 if have_unicode: 259 test_exc(unicode('abc %\u3000','raw-unicode-escape'), 1, ValueError, 260 "unsupported format character '?' (0x3000) at index 5") 261 262 test_exc('%d', '1', TypeError, "%d format: a number is required, not str") 263 test_exc('%g', '1', TypeError, "float argument required, not str") 264 test_exc('no format', '1', TypeError, 265 "not all arguments converted during string formatting") 266 test_exc('no format', u'1', TypeError, 267 "not all arguments converted during string formatting") 268 test_exc(u'no format', '1', TypeError, 269 "not all arguments converted during string formatting") 270 test_exc(u'no format', u'1', TypeError, 271 "not all arguments converted during string formatting") 272 273 class Foobar(long): 274 def __oct__(self): 275 # Returning a non-string should not blow up. 276 return self + 1 277 278 test_exc('%o', Foobar(), TypeError, 279 "expected string or Unicode object, long found") 280 281 if maxsize == 2**31-1: 282 # crashes 2.2.1 and earlier: 283 try: 284 "%*d"%(maxsize, -127) 285 except MemoryError: 286 pass 287 else: 288 raise TestFailed, '"%*d"%(maxsize, -127) should fail' 289 290def test_main(): 291 test_support.run_unittest(FormatTest) 292 293 294if __name__ == "__main__": 295 unittest.main()