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1572 lines
49 KiB
Python
1572 lines
49 KiB
Python
# Python test set -- part 1, grammar.
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# This just tests whether the parser accepts them all.
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from test.support import check_syntax_error
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import inspect
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import unittest
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import sys
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# testing import *
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from sys import *
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# different import patterns to check that __annotations__ does not interfere
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# with import machinery
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import test.ann_module as ann_module
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import typing
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from collections import ChainMap
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from test import ann_module2
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import test
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# These are shared with test_tokenize and other test modules.
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#
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# Note: since several test cases filter out floats by looking for "e" and ".",
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# don't add hexadecimal literals that contain "e" or "E".
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VALID_UNDERSCORE_LITERALS = [
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'0_0_0',
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'4_2',
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'1_0000_0000',
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'0b1001_0100',
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'0xffff_ffff',
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'0o5_7_7',
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'1_00_00.5',
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'1_00_00.5e5',
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'1_00_00e5_1',
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'1e1_0',
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'.1_4',
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'.1_4e1',
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'0b_0',
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'0x_f',
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'0o_5',
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'1_00_00j',
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'1_00_00.5j',
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'1_00_00e5_1j',
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'.1_4j',
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'(1_2.5+3_3j)',
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'(.5_6j)',
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]
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INVALID_UNDERSCORE_LITERALS = [
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# Trailing underscores:
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'0_',
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'42_',
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'1.4j_',
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'0x_',
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'0b1_',
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'0xf_',
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'0o5_',
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'0 if 1_Else 1',
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# Underscores in the base selector:
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'0_b0',
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'0_xf',
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'0_o5',
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# Old-style octal, still disallowed:
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'0_7',
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'09_99',
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# Multiple consecutive underscores:
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'4_______2',
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'0.1__4',
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'0.1__4j',
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'0b1001__0100',
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'0xffff__ffff',
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'0x___',
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'0o5__77',
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'1e1__0',
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'1e1__0j',
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# Underscore right before a dot:
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'1_.4',
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'1_.4j',
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# Underscore right after a dot:
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'1._4',
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'1._4j',
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'._5',
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'._5j',
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# Underscore right after a sign:
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'1.0e+_1',
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'1.0e+_1j',
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# Underscore right before j:
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'1.4_j',
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'1.4e5_j',
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# Underscore right before e:
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'1_e1',
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'1.4_e1',
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'1.4_e1j',
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# Underscore right after e:
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'1e_1',
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'1.4e_1',
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'1.4e_1j',
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# Complex cases with parens:
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'(1+1.5_j_)',
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'(1+1.5_j)',
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]
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class TokenTests(unittest.TestCase):
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def test_backslash(self):
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# Backslash means line continuation:
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x = 1 \
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+ 1
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self.assertEqual(x, 2, 'backslash for line continuation')
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# Backslash does not means continuation in comments :\
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x = 0
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self.assertEqual(x, 0, 'backslash ending comment')
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def test_plain_integers(self):
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self.assertEqual(type(000), type(0))
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self.assertEqual(0xff, 255)
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self.assertEqual(0o377, 255)
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self.assertEqual(2147483647, 0o17777777777)
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self.assertEqual(0b1001, 9)
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# "0x" is not a valid literal
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self.assertRaises(SyntaxError, eval, "0x")
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from sys import maxsize
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if maxsize == 2147483647:
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self.assertEqual(-2147483647-1, -0o20000000000)
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# XXX -2147483648
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self.assertTrue(0o37777777777 > 0)
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self.assertTrue(0xffffffff > 0)
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self.assertTrue(0b1111111111111111111111111111111 > 0)
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for s in ('2147483648', '0o40000000000', '0x100000000',
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'0b10000000000000000000000000000000'):
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try:
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x = eval(s)
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except OverflowError:
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self.fail("OverflowError on huge integer literal %r" % s)
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elif maxsize == 9223372036854775807:
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self.assertEqual(-9223372036854775807-1, -0o1000000000000000000000)
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self.assertTrue(0o1777777777777777777777 > 0)
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self.assertTrue(0xffffffffffffffff > 0)
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self.assertTrue(0b11111111111111111111111111111111111111111111111111111111111111 > 0)
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for s in '9223372036854775808', '0o2000000000000000000000', \
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'0x10000000000000000', \
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'0b100000000000000000000000000000000000000000000000000000000000000':
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try:
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x = eval(s)
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except OverflowError:
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self.fail("OverflowError on huge integer literal %r" % s)
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else:
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self.fail('Weird maxsize value %r' % maxsize)
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def test_long_integers(self):
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x = 0
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x = 0xffffffffffffffff
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x = 0Xffffffffffffffff
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x = 0o77777777777777777
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x = 0O77777777777777777
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x = 123456789012345678901234567890
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x = 0b100000000000000000000000000000000000000000000000000000000000000000000
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x = 0B111111111111111111111111111111111111111111111111111111111111111111111
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def test_floats(self):
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x = 3.14
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x = 314.
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x = 0.314
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# XXX x = 000.314
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x = .314
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x = 3e14
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x = 3E14
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x = 3e-14
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x = 3e+14
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x = 3.e14
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x = .3e14
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x = 3.1e4
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def test_float_exponent_tokenization(self):
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# See issue 21642.
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self.assertEqual(1 if 1else 0, 1)
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self.assertEqual(1 if 0else 0, 0)
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self.assertRaises(SyntaxError, eval, "0 if 1Else 0")
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def test_underscore_literals(self):
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for lit in VALID_UNDERSCORE_LITERALS:
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self.assertEqual(eval(lit), eval(lit.replace('_', '')))
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for lit in INVALID_UNDERSCORE_LITERALS:
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self.assertRaises(SyntaxError, eval, lit)
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# Sanity check: no literal begins with an underscore
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self.assertRaises(NameError, eval, "_0")
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def test_string_literals(self):
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x = ''; y = ""; self.assertTrue(len(x) == 0 and x == y)
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x = '\''; y = "'"; self.assertTrue(len(x) == 1 and x == y and ord(x) == 39)
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x = '"'; y = "\""; self.assertTrue(len(x) == 1 and x == y and ord(x) == 34)
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x = "doesn't \"shrink\" does it"
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y = 'doesn\'t "shrink" does it'
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self.assertTrue(len(x) == 24 and x == y)
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x = "does \"shrink\" doesn't it"
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y = 'does "shrink" doesn\'t it'
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self.assertTrue(len(x) == 24 and x == y)
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x = """
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The "quick"
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brown fox
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jumps over
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the 'lazy' dog.
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"""
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y = '\nThe "quick"\nbrown fox\njumps over\nthe \'lazy\' dog.\n'
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self.assertEqual(x, y)
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y = '''
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The "quick"
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brown fox
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jumps over
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the 'lazy' dog.
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'''
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self.assertEqual(x, y)
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y = "\n\
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The \"quick\"\n\
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brown fox\n\
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jumps over\n\
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the 'lazy' dog.\n\
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"
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self.assertEqual(x, y)
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y = '\n\
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The \"quick\"\n\
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brown fox\n\
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jumps over\n\
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the \'lazy\' dog.\n\
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'
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self.assertEqual(x, y)
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def test_ellipsis(self):
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x = ...
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self.assertTrue(x is Ellipsis)
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self.assertRaises(SyntaxError, eval, ".. .")
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def test_eof_error(self):
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samples = ("def foo(", "\ndef foo(", "def foo(\n")
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for s in samples:
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with self.assertRaises(SyntaxError) as cm:
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compile(s, "<test>", "exec")
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self.assertIn("unexpected EOF", str(cm.exception))
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var_annot_global: int # a global annotated is necessary for test_var_annot
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# custom namespace for testing __annotations__
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class CNS:
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def __init__(self):
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self._dct = {}
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def __setitem__(self, item, value):
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self._dct[item.lower()] = value
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def __getitem__(self, item):
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return self._dct[item]
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class GrammarTests(unittest.TestCase):
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check_syntax_error = check_syntax_error
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# single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE
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# XXX can't test in a script -- this rule is only used when interactive
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# file_input: (NEWLINE | stmt)* ENDMARKER
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# Being tested as this very moment this very module
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# expr_input: testlist NEWLINE
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# XXX Hard to test -- used only in calls to input()
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def test_eval_input(self):
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# testlist ENDMARKER
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x = eval('1, 0 or 1')
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def test_var_annot_basics(self):
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# all these should be allowed
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var1: int = 5
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var2: [int, str]
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my_lst = [42]
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def one():
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return 1
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int.new_attr: int
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[list][0]: type
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my_lst[one()-1]: int = 5
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self.assertEqual(my_lst, [5])
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def test_var_annot_syntax_errors(self):
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# parser pass
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check_syntax_error(self, "def f: int")
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check_syntax_error(self, "x: int: str")
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check_syntax_error(self, "def f():\n"
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" nonlocal x: int\n")
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# AST pass
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check_syntax_error(self, "[x, 0]: int\n")
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check_syntax_error(self, "f(): int\n")
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check_syntax_error(self, "(x,): int")
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check_syntax_error(self, "def f():\n"
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" (x, y): int = (1, 2)\n")
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# symtable pass
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check_syntax_error(self, "def f():\n"
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" x: int\n"
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" global x\n")
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check_syntax_error(self, "def f():\n"
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" global x\n"
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" x: int\n")
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def test_var_annot_basic_semantics(self):
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# execution order
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with self.assertRaises(ZeroDivisionError):
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no_name[does_not_exist]: no_name_again = 1/0
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with self.assertRaises(NameError):
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no_name[does_not_exist]: 1/0 = 0
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global var_annot_global
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# function semantics
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def f():
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st: str = "Hello"
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a.b: int = (1, 2)
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return st
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self.assertEqual(f.__annotations__, {})
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def f_OK():
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x: 1/0
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f_OK()
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def fbad():
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x: int
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print(x)
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with self.assertRaises(UnboundLocalError):
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fbad()
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def f2bad():
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(no_such_global): int
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print(no_such_global)
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try:
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f2bad()
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except Exception as e:
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self.assertIs(type(e), NameError)
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# class semantics
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class C:
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__foo: int
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s: str = "attr"
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z = 2
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def __init__(self, x):
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self.x: int = x
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self.assertEqual(C.__annotations__, {'_C__foo': int, 's': str})
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with self.assertRaises(NameError):
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class CBad:
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no_such_name_defined.attr: int = 0
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with self.assertRaises(NameError):
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class Cbad2(C):
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x: int
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x.y: list = []
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def test_var_annot_metaclass_semantics(self):
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class CMeta(type):
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@classmethod
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def __prepare__(metacls, name, bases, **kwds):
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return {'__annotations__': CNS()}
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class CC(metaclass=CMeta):
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XX: 'ANNOT'
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self.assertEqual(CC.__annotations__['xx'], 'ANNOT')
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def test_var_annot_module_semantics(self):
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with self.assertRaises(AttributeError):
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print(test.__annotations__)
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self.assertEqual(ann_module.__annotations__,
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{1: 2, 'x': int, 'y': str, 'f': typing.Tuple[int, int]})
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self.assertEqual(ann_module.M.__annotations__,
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{'123': 123, 'o': type})
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self.assertEqual(ann_module2.__annotations__, {})
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def test_var_annot_in_module(self):
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# check that functions fail the same way when executed
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# outside of module where they were defined
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from test.ann_module3 import f_bad_ann, g_bad_ann, D_bad_ann
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with self.assertRaises(NameError):
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f_bad_ann()
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with self.assertRaises(NameError):
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g_bad_ann()
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with self.assertRaises(NameError):
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D_bad_ann(5)
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def test_var_annot_simple_exec(self):
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gns = {}; lns= {}
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exec("'docstring'\n"
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"__annotations__[1] = 2\n"
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"x: int = 5\n", gns, lns)
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self.assertEqual(lns["__annotations__"], {1: 2, 'x': int})
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with self.assertRaises(KeyError):
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gns['__annotations__']
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def test_var_annot_custom_maps(self):
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# tests with custom locals() and __annotations__
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ns = {'__annotations__': CNS()}
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exec('X: int; Z: str = "Z"; (w): complex = 1j', ns)
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self.assertEqual(ns['__annotations__']['x'], int)
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self.assertEqual(ns['__annotations__']['z'], str)
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with self.assertRaises(KeyError):
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ns['__annotations__']['w']
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nonloc_ns = {}
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class CNS2:
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def __init__(self):
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self._dct = {}
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def __setitem__(self, item, value):
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nonlocal nonloc_ns
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self._dct[item] = value
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nonloc_ns[item] = value
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def __getitem__(self, item):
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return self._dct[item]
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exec('x: int = 1', {}, CNS2())
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self.assertEqual(nonloc_ns['__annotations__']['x'], int)
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def test_var_annot_refleak(self):
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# complex case: custom locals plus custom __annotations__
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# this was causing refleak
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cns = CNS()
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nonloc_ns = {'__annotations__': cns}
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class CNS2:
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def __init__(self):
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self._dct = {'__annotations__': cns}
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def __setitem__(self, item, value):
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nonlocal nonloc_ns
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self._dct[item] = value
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nonloc_ns[item] = value
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def __getitem__(self, item):
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return self._dct[item]
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exec('X: str', {}, CNS2())
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self.assertEqual(nonloc_ns['__annotations__']['x'], str)
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def test_funcdef(self):
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### [decorators] 'def' NAME parameters ['->' test] ':' suite
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### decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
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### decorators: decorator+
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### parameters: '(' [typedargslist] ')'
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### typedargslist: ((tfpdef ['=' test] ',')*
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### ('*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] | '**' tfpdef)
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### | tfpdef ['=' test] (',' tfpdef ['=' test])* [','])
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### tfpdef: NAME [':' test]
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### varargslist: ((vfpdef ['=' test] ',')*
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### ('*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] | '**' vfpdef)
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### | vfpdef ['=' test] (',' vfpdef ['=' test])* [','])
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### vfpdef: NAME
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def f1(): pass
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f1()
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f1(*())
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f1(*(), **{})
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def f2(one_argument): pass
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def f3(two, arguments): pass
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self.assertEqual(f2.__code__.co_varnames, ('one_argument',))
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self.assertEqual(f3.__code__.co_varnames, ('two', 'arguments'))
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def a1(one_arg,): pass
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def a2(two, args,): pass
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def v0(*rest): pass
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def v1(a, *rest): pass
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def v2(a, b, *rest): pass
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f1()
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f2(1)
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f2(1,)
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f3(1, 2)
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f3(1, 2,)
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v0()
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v0(1)
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v0(1,)
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v0(1,2)
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v0(1,2,3,4,5,6,7,8,9,0)
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v1(1)
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v1(1,)
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v1(1,2)
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v1(1,2,3)
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v1(1,2,3,4,5,6,7,8,9,0)
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v2(1,2)
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v2(1,2,3)
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v2(1,2,3,4)
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v2(1,2,3,4,5,6,7,8,9,0)
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def d01(a=1): pass
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d01()
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d01(1)
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d01(*(1,))
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d01(*[] or [2])
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d01(*() or (), *{} and (), **() or {})
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d01(**{'a':2})
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d01(**{'a':2} or {})
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def d11(a, b=1): pass
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d11(1)
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d11(1, 2)
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d11(1, **{'b':2})
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def d21(a, b, c=1): pass
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d21(1, 2)
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d21(1, 2, 3)
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d21(*(1, 2, 3))
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d21(1, *(2, 3))
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d21(1, 2, *(3,))
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d21(1, 2, **{'c':3})
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def d02(a=1, b=2): pass
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d02()
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d02(1)
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d02(1, 2)
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d02(*(1, 2))
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d02(1, *(2,))
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d02(1, **{'b':2})
|
|
d02(**{'a': 1, 'b': 2})
|
|
def d12(a, b=1, c=2): pass
|
|
d12(1)
|
|
d12(1, 2)
|
|
d12(1, 2, 3)
|
|
def d22(a, b, c=1, d=2): pass
|
|
d22(1, 2)
|
|
d22(1, 2, 3)
|
|
d22(1, 2, 3, 4)
|
|
def d01v(a=1, *rest): pass
|
|
d01v()
|
|
d01v(1)
|
|
d01v(1, 2)
|
|
d01v(*(1, 2, 3, 4))
|
|
d01v(*(1,))
|
|
d01v(**{'a':2})
|
|
def d11v(a, b=1, *rest): pass
|
|
d11v(1)
|
|
d11v(1, 2)
|
|
d11v(1, 2, 3)
|
|
def d21v(a, b, c=1, *rest): pass
|
|
d21v(1, 2)
|
|
d21v(1, 2, 3)
|
|
d21v(1, 2, 3, 4)
|
|
d21v(*(1, 2, 3, 4))
|
|
d21v(1, 2, **{'c': 3})
|
|
def d02v(a=1, b=2, *rest): pass
|
|
d02v()
|
|
d02v(1)
|
|
d02v(1, 2)
|
|
d02v(1, 2, 3)
|
|
d02v(1, *(2, 3, 4))
|
|
d02v(**{'a': 1, 'b': 2})
|
|
def d12v(a, b=1, c=2, *rest): pass
|
|
d12v(1)
|
|
d12v(1, 2)
|
|
d12v(1, 2, 3)
|
|
d12v(1, 2, 3, 4)
|
|
d12v(*(1, 2, 3, 4))
|
|
d12v(1, 2, *(3, 4, 5))
|
|
d12v(1, *(2,), **{'c': 3})
|
|
def d22v(a, b, c=1, d=2, *rest): pass
|
|
d22v(1, 2)
|
|
d22v(1, 2, 3)
|
|
d22v(1, 2, 3, 4)
|
|
d22v(1, 2, 3, 4, 5)
|
|
d22v(*(1, 2, 3, 4))
|
|
d22v(1, 2, *(3, 4, 5))
|
|
d22v(1, *(2, 3), **{'d': 4})
|
|
|
|
# keyword argument type tests
|
|
try:
|
|
str('x', **{b'foo':1 })
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail('Bytes should not work as keyword argument names')
|
|
# keyword only argument tests
|
|
def pos0key1(*, key): return key
|
|
pos0key1(key=100)
|
|
def pos2key2(p1, p2, *, k1, k2=100): return p1,p2,k1,k2
|
|
pos2key2(1, 2, k1=100)
|
|
pos2key2(1, 2, k1=100, k2=200)
|
|
pos2key2(1, 2, k2=100, k1=200)
|
|
def pos2key2dict(p1, p2, *, k1=100, k2, **kwarg): return p1,p2,k1,k2,kwarg
|
|
pos2key2dict(1,2,k2=100,tokwarg1=100,tokwarg2=200)
|
|
pos2key2dict(1,2,tokwarg1=100,tokwarg2=200, k2=100)
|
|
|
|
self.assertRaises(SyntaxError, eval, "def f(*): pass")
|
|
self.assertRaises(SyntaxError, eval, "def f(*,): pass")
|
|
self.assertRaises(SyntaxError, eval, "def f(*, **kwds): pass")
|
|
|
|
# keyword arguments after *arglist
|
|
def f(*args, **kwargs):
|
|
return args, kwargs
|
|
self.assertEqual(f(1, x=2, *[3, 4], y=5), ((1, 3, 4),
|
|
{'x':2, 'y':5}))
|
|
self.assertEqual(f(1, *(2,3), 4), ((1, 2, 3, 4), {}))
|
|
self.assertRaises(SyntaxError, eval, "f(1, x=2, *(3,4), x=5)")
|
|
self.assertEqual(f(**{'eggs':'scrambled', 'spam':'fried'}),
|
|
((), {'eggs':'scrambled', 'spam':'fried'}))
|
|
self.assertEqual(f(spam='fried', **{'eggs':'scrambled'}),
|
|
((), {'eggs':'scrambled', 'spam':'fried'}))
|
|
|
|
# Check ast errors in *args and *kwargs
|
|
check_syntax_error(self, "f(*g(1=2))")
|
|
check_syntax_error(self, "f(**g(1=2))")
|
|
|
|
# argument annotation tests
|
|
def f(x) -> list: pass
|
|
self.assertEqual(f.__annotations__, {'return': list})
|
|
def f(x: int): pass
|
|
self.assertEqual(f.__annotations__, {'x': int})
|
|
def f(*x: str): pass
|
|
self.assertEqual(f.__annotations__, {'x': str})
|
|
def f(**x: float): pass
|
|
self.assertEqual(f.__annotations__, {'x': float})
|
|
def f(x, y: 1+2): pass
|
|
self.assertEqual(f.__annotations__, {'y': 3})
|
|
def f(a, b: 1, c: 2, d): pass
|
|
self.assertEqual(f.__annotations__, {'b': 1, 'c': 2})
|
|
def f(a, b: 1, c: 2, d, e: 3 = 4, f=5, *g: 6): pass
|
|
self.assertEqual(f.__annotations__,
|
|
{'b': 1, 'c': 2, 'e': 3, 'g': 6})
|
|
def f(a, b: 1, c: 2, d, e: 3 = 4, f=5, *g: 6, h: 7, i=8, j: 9 = 10,
|
|
**k: 11) -> 12: pass
|
|
self.assertEqual(f.__annotations__,
|
|
{'b': 1, 'c': 2, 'e': 3, 'g': 6, 'h': 7, 'j': 9,
|
|
'k': 11, 'return': 12})
|
|
# Check for issue #20625 -- annotations mangling
|
|
class Spam:
|
|
def f(self, *, __kw: 1):
|
|
pass
|
|
class Ham(Spam): pass
|
|
self.assertEqual(Spam.f.__annotations__, {'_Spam__kw': 1})
|
|
self.assertEqual(Ham.f.__annotations__, {'_Spam__kw': 1})
|
|
# Check for SF Bug #1697248 - mixing decorators and a return annotation
|
|
def null(x): return x
|
|
@null
|
|
def f(x) -> list: pass
|
|
self.assertEqual(f.__annotations__, {'return': list})
|
|
|
|
# test closures with a variety of opargs
|
|
closure = 1
|
|
def f(): return closure
|
|
def f(x=1): return closure
|
|
def f(*, k=1): return closure
|
|
def f() -> int: return closure
|
|
|
|
# Check trailing commas are permitted in funcdef argument list
|
|
def f(a,): pass
|
|
def f(*args,): pass
|
|
def f(**kwds,): pass
|
|
def f(a, *args,): pass
|
|
def f(a, **kwds,): pass
|
|
def f(*args, b,): pass
|
|
def f(*, b,): pass
|
|
def f(*args, **kwds,): pass
|
|
def f(a, *args, b,): pass
|
|
def f(a, *, b,): pass
|
|
def f(a, *args, **kwds,): pass
|
|
def f(*args, b, **kwds,): pass
|
|
def f(*, b, **kwds,): pass
|
|
def f(a, *args, b, **kwds,): pass
|
|
def f(a, *, b, **kwds,): pass
|
|
|
|
def test_lambdef(self):
|
|
### lambdef: 'lambda' [varargslist] ':' test
|
|
l1 = lambda : 0
|
|
self.assertEqual(l1(), 0)
|
|
l2 = lambda : a[d] # XXX just testing the expression
|
|
l3 = lambda : [2 < x for x in [-1, 3, 0]]
|
|
self.assertEqual(l3(), [0, 1, 0])
|
|
l4 = lambda x = lambda y = lambda z=1 : z : y() : x()
|
|
self.assertEqual(l4(), 1)
|
|
l5 = lambda x, y, z=2: x + y + z
|
|
self.assertEqual(l5(1, 2), 5)
|
|
self.assertEqual(l5(1, 2, 3), 6)
|
|
check_syntax_error(self, "lambda x: x = 2")
|
|
check_syntax_error(self, "lambda (None,): None")
|
|
l6 = lambda x, y, *, k=20: x+y+k
|
|
self.assertEqual(l6(1,2), 1+2+20)
|
|
self.assertEqual(l6(1,2,k=10), 1+2+10)
|
|
|
|
# check that trailing commas are permitted
|
|
l10 = lambda a,: 0
|
|
l11 = lambda *args,: 0
|
|
l12 = lambda **kwds,: 0
|
|
l13 = lambda a, *args,: 0
|
|
l14 = lambda a, **kwds,: 0
|
|
l15 = lambda *args, b,: 0
|
|
l16 = lambda *, b,: 0
|
|
l17 = lambda *args, **kwds,: 0
|
|
l18 = lambda a, *args, b,: 0
|
|
l19 = lambda a, *, b,: 0
|
|
l20 = lambda a, *args, **kwds,: 0
|
|
l21 = lambda *args, b, **kwds,: 0
|
|
l22 = lambda *, b, **kwds,: 0
|
|
l23 = lambda a, *args, b, **kwds,: 0
|
|
l24 = lambda a, *, b, **kwds,: 0
|
|
|
|
|
|
### stmt: simple_stmt | compound_stmt
|
|
# Tested below
|
|
|
|
def test_simple_stmt(self):
|
|
### simple_stmt: small_stmt (';' small_stmt)* [';']
|
|
x = 1; pass; del x
|
|
def foo():
|
|
# verify statements that end with semi-colons
|
|
x = 1; pass; del x;
|
|
foo()
|
|
|
|
### small_stmt: expr_stmt | pass_stmt | del_stmt | flow_stmt | import_stmt | global_stmt | access_stmt
|
|
# Tested below
|
|
|
|
def test_expr_stmt(self):
|
|
# (exprlist '=')* exprlist
|
|
1
|
|
1, 2, 3
|
|
x = 1
|
|
x = 1, 2, 3
|
|
x = y = z = 1, 2, 3
|
|
x, y, z = 1, 2, 3
|
|
abc = a, b, c = x, y, z = xyz = 1, 2, (3, 4)
|
|
|
|
check_syntax_error(self, "x + 1 = 1")
|
|
check_syntax_error(self, "a + 1 = b + 2")
|
|
|
|
# Check the heuristic for print & exec covers significant cases
|
|
# As well as placing some limits on false positives
|
|
def test_former_statements_refer_to_builtins(self):
|
|
keywords = "print", "exec"
|
|
# Cases where we want the custom error
|
|
cases = [
|
|
"{} foo",
|
|
"{} {{1:foo}}",
|
|
"if 1: {} foo",
|
|
"if 1: {} {{1:foo}}",
|
|
"if 1:\n {} foo",
|
|
"if 1:\n {} {{1:foo}}",
|
|
]
|
|
for keyword in keywords:
|
|
custom_msg = "call to '{}'".format(keyword)
|
|
for case in cases:
|
|
source = case.format(keyword)
|
|
with self.subTest(source=source):
|
|
with self.assertRaisesRegex(SyntaxError, custom_msg):
|
|
exec(source)
|
|
source = source.replace("foo", "(foo.)")
|
|
with self.subTest(source=source):
|
|
with self.assertRaisesRegex(SyntaxError, "invalid syntax"):
|
|
exec(source)
|
|
|
|
def test_del_stmt(self):
|
|
# 'del' exprlist
|
|
abc = [1,2,3]
|
|
x, y, z = abc
|
|
xyz = x, y, z
|
|
|
|
del abc
|
|
del x, y, (z, xyz)
|
|
|
|
def test_pass_stmt(self):
|
|
# 'pass'
|
|
pass
|
|
|
|
# flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt
|
|
# Tested below
|
|
|
|
def test_break_stmt(self):
|
|
# 'break'
|
|
while 1: break
|
|
|
|
def test_continue_stmt(self):
|
|
# 'continue'
|
|
i = 1
|
|
while i: i = 0; continue
|
|
|
|
msg = ""
|
|
while not msg:
|
|
msg = "ok"
|
|
try:
|
|
continue
|
|
msg = "continue failed to continue inside try"
|
|
except:
|
|
msg = "continue inside try called except block"
|
|
if msg != "ok":
|
|
self.fail(msg)
|
|
|
|
msg = ""
|
|
while not msg:
|
|
msg = "finally block not called"
|
|
try:
|
|
continue
|
|
finally:
|
|
msg = "ok"
|
|
if msg != "ok":
|
|
self.fail(msg)
|
|
|
|
def test_break_continue_loop(self):
|
|
# This test warrants an explanation. It is a test specifically for SF bugs
|
|
# #463359 and #462937. The bug is that a 'break' statement executed or
|
|
# exception raised inside a try/except inside a loop, *after* a continue
|
|
# statement has been executed in that loop, will cause the wrong number of
|
|
# arguments to be popped off the stack and the instruction pointer reset to
|
|
# a very small number (usually 0.) Because of this, the following test
|
|
# *must* written as a function, and the tracking vars *must* be function
|
|
# arguments with default values. Otherwise, the test will loop and loop.
|
|
|
|
def test_inner(extra_burning_oil = 1, count=0):
|
|
big_hippo = 2
|
|
while big_hippo:
|
|
count += 1
|
|
try:
|
|
if extra_burning_oil and big_hippo == 1:
|
|
extra_burning_oil -= 1
|
|
break
|
|
big_hippo -= 1
|
|
continue
|
|
except:
|
|
raise
|
|
if count > 2 or big_hippo != 1:
|
|
self.fail("continue then break in try/except in loop broken!")
|
|
test_inner()
|
|
|
|
def test_return(self):
|
|
# 'return' [testlist]
|
|
def g1(): return
|
|
def g2(): return 1
|
|
g1()
|
|
x = g2()
|
|
check_syntax_error(self, "class foo:return 1")
|
|
|
|
def test_break_in_finally(self):
|
|
count = 0
|
|
while count < 2:
|
|
count += 1
|
|
try:
|
|
pass
|
|
finally:
|
|
break
|
|
self.assertEqual(count, 1)
|
|
|
|
count = 0
|
|
while count < 2:
|
|
count += 1
|
|
try:
|
|
continue
|
|
finally:
|
|
break
|
|
self.assertEqual(count, 1)
|
|
|
|
count = 0
|
|
while count < 2:
|
|
count += 1
|
|
try:
|
|
1/0
|
|
finally:
|
|
break
|
|
self.assertEqual(count, 1)
|
|
|
|
for count in [0, 1]:
|
|
self.assertEqual(count, 0)
|
|
try:
|
|
pass
|
|
finally:
|
|
break
|
|
self.assertEqual(count, 0)
|
|
|
|
for count in [0, 1]:
|
|
self.assertEqual(count, 0)
|
|
try:
|
|
continue
|
|
finally:
|
|
break
|
|
self.assertEqual(count, 0)
|
|
|
|
for count in [0, 1]:
|
|
self.assertEqual(count, 0)
|
|
try:
|
|
1/0
|
|
finally:
|
|
break
|
|
self.assertEqual(count, 0)
|
|
|
|
def test_continue_in_finally(self):
|
|
count = 0
|
|
while count < 2:
|
|
count += 1
|
|
try:
|
|
pass
|
|
finally:
|
|
continue
|
|
break
|
|
self.assertEqual(count, 2)
|
|
|
|
count = 0
|
|
while count < 2:
|
|
count += 1
|
|
try:
|
|
break
|
|
finally:
|
|
continue
|
|
self.assertEqual(count, 2)
|
|
|
|
count = 0
|
|
while count < 2:
|
|
count += 1
|
|
try:
|
|
1/0
|
|
finally:
|
|
continue
|
|
break
|
|
self.assertEqual(count, 2)
|
|
|
|
for count in [0, 1]:
|
|
try:
|
|
pass
|
|
finally:
|
|
continue
|
|
break
|
|
self.assertEqual(count, 1)
|
|
|
|
for count in [0, 1]:
|
|
try:
|
|
break
|
|
finally:
|
|
continue
|
|
self.assertEqual(count, 1)
|
|
|
|
for count in [0, 1]:
|
|
try:
|
|
1/0
|
|
finally:
|
|
continue
|
|
break
|
|
self.assertEqual(count, 1)
|
|
|
|
def test_return_in_finally(self):
|
|
def g1():
|
|
try:
|
|
pass
|
|
finally:
|
|
return 1
|
|
self.assertEqual(g1(), 1)
|
|
|
|
def g2():
|
|
try:
|
|
return 2
|
|
finally:
|
|
return 3
|
|
self.assertEqual(g2(), 3)
|
|
|
|
def g3():
|
|
try:
|
|
1/0
|
|
finally:
|
|
return 4
|
|
self.assertEqual(g3(), 4)
|
|
|
|
def test_yield(self):
|
|
# Allowed as standalone statement
|
|
def g(): yield 1
|
|
def g(): yield from ()
|
|
# Allowed as RHS of assignment
|
|
def g(): x = yield 1
|
|
def g(): x = yield from ()
|
|
# Ordinary yield accepts implicit tuples
|
|
def g(): yield 1, 1
|
|
def g(): x = yield 1, 1
|
|
# 'yield from' does not
|
|
check_syntax_error(self, "def g(): yield from (), 1")
|
|
check_syntax_error(self, "def g(): x = yield from (), 1")
|
|
# Requires parentheses as subexpression
|
|
def g(): 1, (yield 1)
|
|
def g(): 1, (yield from ())
|
|
check_syntax_error(self, "def g(): 1, yield 1")
|
|
check_syntax_error(self, "def g(): 1, yield from ()")
|
|
# Requires parentheses as call argument
|
|
def g(): f((yield 1))
|
|
def g(): f((yield 1), 1)
|
|
def g(): f((yield from ()))
|
|
def g(): f((yield from ()), 1)
|
|
check_syntax_error(self, "def g(): f(yield 1)")
|
|
check_syntax_error(self, "def g(): f(yield 1, 1)")
|
|
check_syntax_error(self, "def g(): f(yield from ())")
|
|
check_syntax_error(self, "def g(): f(yield from (), 1)")
|
|
# Not allowed at top level
|
|
check_syntax_error(self, "yield")
|
|
check_syntax_error(self, "yield from")
|
|
# Not allowed at class scope
|
|
check_syntax_error(self, "class foo:yield 1")
|
|
check_syntax_error(self, "class foo:yield from ()")
|
|
# Check annotation refleak on SyntaxError
|
|
check_syntax_error(self, "def g(a:(yield)): pass")
|
|
|
|
def test_yield_in_comprehensions(self):
|
|
# Check yield in comprehensions
|
|
def g(): [x for x in [(yield 1)]]
|
|
def g(): [x for x in [(yield from ())]]
|
|
|
|
check = self.check_syntax_error
|
|
check("def g(): [(yield x) for x in ()]",
|
|
"'yield' inside list comprehension")
|
|
check("def g(): [x for x in () if not (yield x)]",
|
|
"'yield' inside list comprehension")
|
|
check("def g(): [y for x in () for y in [(yield x)]]",
|
|
"'yield' inside list comprehension")
|
|
check("def g(): {(yield x) for x in ()}",
|
|
"'yield' inside set comprehension")
|
|
check("def g(): {(yield x): x for x in ()}",
|
|
"'yield' inside dict comprehension")
|
|
check("def g(): {x: (yield x) for x in ()}",
|
|
"'yield' inside dict comprehension")
|
|
check("def g(): ((yield x) for x in ())",
|
|
"'yield' inside generator expression")
|
|
check("def g(): [(yield from x) for x in ()]",
|
|
"'yield' inside list comprehension")
|
|
check("class C: [(yield x) for x in ()]",
|
|
"'yield' inside list comprehension")
|
|
check("[(yield x) for x in ()]",
|
|
"'yield' inside list comprehension")
|
|
|
|
def test_raise(self):
|
|
# 'raise' test [',' test]
|
|
try: raise RuntimeError('just testing')
|
|
except RuntimeError: pass
|
|
try: raise KeyboardInterrupt
|
|
except KeyboardInterrupt: pass
|
|
|
|
def test_import(self):
|
|
# 'import' dotted_as_names
|
|
import sys
|
|
import time, sys
|
|
# 'from' dotted_name 'import' ('*' | '(' import_as_names ')' | import_as_names)
|
|
from time import time
|
|
from time import (time)
|
|
# not testable inside a function, but already done at top of the module
|
|
# from sys import *
|
|
from sys import path, argv
|
|
from sys import (path, argv)
|
|
from sys import (path, argv,)
|
|
|
|
def test_global(self):
|
|
# 'global' NAME (',' NAME)*
|
|
global a
|
|
global a, b
|
|
global one, two, three, four, five, six, seven, eight, nine, ten
|
|
|
|
def test_nonlocal(self):
|
|
# 'nonlocal' NAME (',' NAME)*
|
|
x = 0
|
|
y = 0
|
|
def f():
|
|
nonlocal x
|
|
nonlocal x, y
|
|
|
|
def test_assert(self):
|
|
# assertTruestmt: 'assert' test [',' test]
|
|
assert 1
|
|
assert 1, 1
|
|
assert lambda x:x
|
|
assert 1, lambda x:x+1
|
|
|
|
try:
|
|
assert True
|
|
except AssertionError as e:
|
|
self.fail("'assert True' should not have raised an AssertionError")
|
|
|
|
try:
|
|
assert True, 'this should always pass'
|
|
except AssertionError as e:
|
|
self.fail("'assert True, msg' should not have "
|
|
"raised an AssertionError")
|
|
|
|
# these tests fail if python is run with -O, so check __debug__
|
|
@unittest.skipUnless(__debug__, "Won't work if __debug__ is False")
|
|
def testAssert2(self):
|
|
try:
|
|
assert 0, "msg"
|
|
except AssertionError as e:
|
|
self.assertEqual(e.args[0], "msg")
|
|
else:
|
|
self.fail("AssertionError not raised by assert 0")
|
|
|
|
try:
|
|
assert False
|
|
except AssertionError as e:
|
|
self.assertEqual(len(e.args), 0)
|
|
else:
|
|
self.fail("AssertionError not raised by 'assert False'")
|
|
|
|
|
|
### compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef
|
|
# Tested below
|
|
|
|
def test_if(self):
|
|
# 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
|
|
if 1: pass
|
|
if 1: pass
|
|
else: pass
|
|
if 0: pass
|
|
elif 0: pass
|
|
if 0: pass
|
|
elif 0: pass
|
|
elif 0: pass
|
|
elif 0: pass
|
|
else: pass
|
|
|
|
def test_while(self):
|
|
# 'while' test ':' suite ['else' ':' suite]
|
|
while 0: pass
|
|
while 0: pass
|
|
else: pass
|
|
|
|
# Issue1920: "while 0" is optimized away,
|
|
# ensure that the "else" clause is still present.
|
|
x = 0
|
|
while 0:
|
|
x = 1
|
|
else:
|
|
x = 2
|
|
self.assertEqual(x, 2)
|
|
|
|
def test_for(self):
|
|
# 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite]
|
|
for i in 1, 2, 3: pass
|
|
for i, j, k in (): pass
|
|
else: pass
|
|
class Squares:
|
|
def __init__(self, max):
|
|
self.max = max
|
|
self.sofar = []
|
|
def __len__(self): return len(self.sofar)
|
|
def __getitem__(self, i):
|
|
if not 0 <= i < self.max: raise IndexError
|
|
n = len(self.sofar)
|
|
while n <= i:
|
|
self.sofar.append(n*n)
|
|
n = n+1
|
|
return self.sofar[i]
|
|
n = 0
|
|
for x in Squares(10): n = n+x
|
|
if n != 285:
|
|
self.fail('for over growing sequence')
|
|
|
|
result = []
|
|
for x, in [(1,), (2,), (3,)]:
|
|
result.append(x)
|
|
self.assertEqual(result, [1, 2, 3])
|
|
|
|
def test_try(self):
|
|
### try_stmt: 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite]
|
|
### | 'try' ':' suite 'finally' ':' suite
|
|
### except_clause: 'except' [expr ['as' expr]]
|
|
try:
|
|
1/0
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
pass
|
|
try: 1/0
|
|
except EOFError: pass
|
|
except TypeError as msg: pass
|
|
except: pass
|
|
else: pass
|
|
try: 1/0
|
|
except (EOFError, TypeError, ZeroDivisionError): pass
|
|
try: 1/0
|
|
except (EOFError, TypeError, ZeroDivisionError) as msg: pass
|
|
try: pass
|
|
finally: pass
|
|
|
|
def test_suite(self):
|
|
# simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT
|
|
if 1: pass
|
|
if 1:
|
|
pass
|
|
if 1:
|
|
#
|
|
#
|
|
#
|
|
pass
|
|
pass
|
|
#
|
|
pass
|
|
#
|
|
|
|
def test_test(self):
|
|
### and_test ('or' and_test)*
|
|
### and_test: not_test ('and' not_test)*
|
|
### not_test: 'not' not_test | comparison
|
|
if not 1: pass
|
|
if 1 and 1: pass
|
|
if 1 or 1: pass
|
|
if not not not 1: pass
|
|
if not 1 and 1 and 1: pass
|
|
if 1 and 1 or 1 and 1 and 1 or not 1 and 1: pass
|
|
|
|
def test_comparison(self):
|
|
### comparison: expr (comp_op expr)*
|
|
### comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is'|'is' 'not'
|
|
if 1: pass
|
|
x = (1 == 1)
|
|
if 1 == 1: pass
|
|
if 1 != 1: pass
|
|
if 1 < 1: pass
|
|
if 1 > 1: pass
|
|
if 1 <= 1: pass
|
|
if 1 >= 1: pass
|
|
if 1 is 1: pass
|
|
if 1 is not 1: pass
|
|
if 1 in (): pass
|
|
if 1 not in (): pass
|
|
if 1 < 1 > 1 == 1 >= 1 <= 1 != 1 in 1 not in 1 is 1 is not 1: pass
|
|
|
|
def test_binary_mask_ops(self):
|
|
x = 1 & 1
|
|
x = 1 ^ 1
|
|
x = 1 | 1
|
|
|
|
def test_shift_ops(self):
|
|
x = 1 << 1
|
|
x = 1 >> 1
|
|
x = 1 << 1 >> 1
|
|
|
|
def test_additive_ops(self):
|
|
x = 1
|
|
x = 1 + 1
|
|
x = 1 - 1 - 1
|
|
x = 1 - 1 + 1 - 1 + 1
|
|
|
|
def test_multiplicative_ops(self):
|
|
x = 1 * 1
|
|
x = 1 / 1
|
|
x = 1 % 1
|
|
x = 1 / 1 * 1 % 1
|
|
|
|
def test_unary_ops(self):
|
|
x = +1
|
|
x = -1
|
|
x = ~1
|
|
x = ~1 ^ 1 & 1 | 1 & 1 ^ -1
|
|
x = -1*1/1 + 1*1 - ---1*1
|
|
|
|
def test_selectors(self):
|
|
### trailer: '(' [testlist] ')' | '[' subscript ']' | '.' NAME
|
|
### subscript: expr | [expr] ':' [expr]
|
|
|
|
import sys, time
|
|
c = sys.path[0]
|
|
x = time.time()
|
|
x = sys.modules['time'].time()
|
|
a = '01234'
|
|
c = a[0]
|
|
c = a[-1]
|
|
s = a[0:5]
|
|
s = a[:5]
|
|
s = a[0:]
|
|
s = a[:]
|
|
s = a[-5:]
|
|
s = a[:-1]
|
|
s = a[-4:-3]
|
|
# A rough test of SF bug 1333982. http://python.org/sf/1333982
|
|
# The testing here is fairly incomplete.
|
|
# Test cases should include: commas with 1 and 2 colons
|
|
d = {}
|
|
d[1] = 1
|
|
d[1,] = 2
|
|
d[1,2] = 3
|
|
d[1,2,3] = 4
|
|
L = list(d)
|
|
L.sort(key=lambda x: (type(x).__name__, x))
|
|
self.assertEqual(str(L), '[1, (1,), (1, 2), (1, 2, 3)]')
|
|
|
|
def test_atoms(self):
|
|
### atom: '(' [testlist] ')' | '[' [testlist] ']' | '{' [dictsetmaker] '}' | NAME | NUMBER | STRING
|
|
### dictsetmaker: (test ':' test (',' test ':' test)* [',']) | (test (',' test)* [','])
|
|
|
|
x = (1)
|
|
x = (1 or 2 or 3)
|
|
x = (1 or 2 or 3, 2, 3)
|
|
|
|
x = []
|
|
x = [1]
|
|
x = [1 or 2 or 3]
|
|
x = [1 or 2 or 3, 2, 3]
|
|
x = []
|
|
|
|
x = {}
|
|
x = {'one': 1}
|
|
x = {'one': 1,}
|
|
x = {'one' or 'two': 1 or 2}
|
|
x = {'one': 1, 'two': 2}
|
|
x = {'one': 1, 'two': 2,}
|
|
x = {'one': 1, 'two': 2, 'three': 3, 'four': 4, 'five': 5, 'six': 6}
|
|
|
|
x = {'one'}
|
|
x = {'one', 1,}
|
|
x = {'one', 'two', 'three'}
|
|
x = {2, 3, 4,}
|
|
|
|
x = x
|
|
x = 'x'
|
|
x = 123
|
|
|
|
### exprlist: expr (',' expr)* [',']
|
|
### testlist: test (',' test)* [',']
|
|
# These have been exercised enough above
|
|
|
|
def test_classdef(self):
|
|
# 'class' NAME ['(' [testlist] ')'] ':' suite
|
|
class B: pass
|
|
class B2(): pass
|
|
class C1(B): pass
|
|
class C2(B): pass
|
|
class D(C1, C2, B): pass
|
|
class C:
|
|
def meth1(self): pass
|
|
def meth2(self, arg): pass
|
|
def meth3(self, a1, a2): pass
|
|
|
|
# decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
|
|
# decorators: decorator+
|
|
# decorated: decorators (classdef | funcdef)
|
|
def class_decorator(x): return x
|
|
@class_decorator
|
|
class G: pass
|
|
|
|
def test_dictcomps(self):
|
|
# dictorsetmaker: ( (test ':' test (comp_for |
|
|
# (',' test ':' test)* [','])) |
|
|
# (test (comp_for | (',' test)* [','])) )
|
|
nums = [1, 2, 3]
|
|
self.assertEqual({i:i+1 for i in nums}, {1: 2, 2: 3, 3: 4})
|
|
|
|
def test_listcomps(self):
|
|
# list comprehension tests
|
|
nums = [1, 2, 3, 4, 5]
|
|
strs = ["Apple", "Banana", "Coconut"]
|
|
spcs = [" Apple", " Banana ", "Coco nut "]
|
|
|
|
self.assertEqual([s.strip() for s in spcs], ['Apple', 'Banana', 'Coco nut'])
|
|
self.assertEqual([3 * x for x in nums], [3, 6, 9, 12, 15])
|
|
self.assertEqual([x for x in nums if x > 2], [3, 4, 5])
|
|
self.assertEqual([(i, s) for i in nums for s in strs],
|
|
[(1, 'Apple'), (1, 'Banana'), (1, 'Coconut'),
|
|
(2, 'Apple'), (2, 'Banana'), (2, 'Coconut'),
|
|
(3, 'Apple'), (3, 'Banana'), (3, 'Coconut'),
|
|
(4, 'Apple'), (4, 'Banana'), (4, 'Coconut'),
|
|
(5, 'Apple'), (5, 'Banana'), (5, 'Coconut')])
|
|
self.assertEqual([(i, s) for i in nums for s in [f for f in strs if "n" in f]],
|
|
[(1, 'Banana'), (1, 'Coconut'), (2, 'Banana'), (2, 'Coconut'),
|
|
(3, 'Banana'), (3, 'Coconut'), (4, 'Banana'), (4, 'Coconut'),
|
|
(5, 'Banana'), (5, 'Coconut')])
|
|
self.assertEqual([(lambda a:[a**i for i in range(a+1)])(j) for j in range(5)],
|
|
[[1], [1, 1], [1, 2, 4], [1, 3, 9, 27], [1, 4, 16, 64, 256]])
|
|
|
|
def test_in_func(l):
|
|
return [0 < x < 3 for x in l if x > 2]
|
|
|
|
self.assertEqual(test_in_func(nums), [False, False, False])
|
|
|
|
def test_nested_front():
|
|
self.assertEqual([[y for y in [x, x + 1]] for x in [1,3,5]],
|
|
[[1, 2], [3, 4], [5, 6]])
|
|
|
|
test_nested_front()
|
|
|
|
check_syntax_error(self, "[i, s for i in nums for s in strs]")
|
|
check_syntax_error(self, "[x if y]")
|
|
|
|
suppliers = [
|
|
(1, "Boeing"),
|
|
(2, "Ford"),
|
|
(3, "Macdonalds")
|
|
]
|
|
|
|
parts = [
|
|
(10, "Airliner"),
|
|
(20, "Engine"),
|
|
(30, "Cheeseburger")
|
|
]
|
|
|
|
suppart = [
|
|
(1, 10), (1, 20), (2, 20), (3, 30)
|
|
]
|
|
|
|
x = [
|
|
(sname, pname)
|
|
for (sno, sname) in suppliers
|
|
for (pno, pname) in parts
|
|
for (sp_sno, sp_pno) in suppart
|
|
if sno == sp_sno and pno == sp_pno
|
|
]
|
|
|
|
self.assertEqual(x, [('Boeing', 'Airliner'), ('Boeing', 'Engine'), ('Ford', 'Engine'),
|
|
('Macdonalds', 'Cheeseburger')])
|
|
|
|
def test_genexps(self):
|
|
# generator expression tests
|
|
g = ([x for x in range(10)] for x in range(1))
|
|
self.assertEqual(next(g), [x for x in range(10)])
|
|
try:
|
|
next(g)
|
|
self.fail('should produce StopIteration exception')
|
|
except StopIteration:
|
|
pass
|
|
|
|
a = 1
|
|
try:
|
|
g = (a for d in a)
|
|
next(g)
|
|
self.fail('should produce TypeError')
|
|
except TypeError:
|
|
pass
|
|
|
|
self.assertEqual(list((x, y) for x in 'abcd' for y in 'abcd'), [(x, y) for x in 'abcd' for y in 'abcd'])
|
|
self.assertEqual(list((x, y) for x in 'ab' for y in 'xy'), [(x, y) for x in 'ab' for y in 'xy'])
|
|
|
|
a = [x for x in range(10)]
|
|
b = (x for x in (y for y in a))
|
|
self.assertEqual(sum(b), sum([x for x in range(10)]))
|
|
|
|
self.assertEqual(sum(x**2 for x in range(10)), sum([x**2 for x in range(10)]))
|
|
self.assertEqual(sum(x*x for x in range(10) if x%2), sum([x*x for x in range(10) if x%2]))
|
|
self.assertEqual(sum(x for x in (y for y in range(10))), sum([x for x in range(10)]))
|
|
self.assertEqual(sum(x for x in (y for y in (z for z in range(10)))), sum([x for x in range(10)]))
|
|
self.assertEqual(sum(x for x in [y for y in (z for z in range(10))]), sum([x for x in range(10)]))
|
|
self.assertEqual(sum(x for x in (y for y in (z for z in range(10) if True)) if True), sum([x for x in range(10)]))
|
|
self.assertEqual(sum(x for x in (y for y in (z for z in range(10) if True) if False) if True), 0)
|
|
check_syntax_error(self, "foo(x for x in range(10), 100)")
|
|
check_syntax_error(self, "foo(100, x for x in range(10))")
|
|
|
|
def test_comprehension_specials(self):
|
|
# test for outmost iterable precomputation
|
|
x = 10; g = (i for i in range(x)); x = 5
|
|
self.assertEqual(len(list(g)), 10)
|
|
|
|
# This should hold, since we're only precomputing outmost iterable.
|
|
x = 10; t = False; g = ((i,j) for i in range(x) if t for j in range(x))
|
|
x = 5; t = True;
|
|
self.assertEqual([(i,j) for i in range(10) for j in range(5)], list(g))
|
|
|
|
# Grammar allows multiple adjacent 'if's in listcomps and genexps,
|
|
# even though it's silly. Make sure it works (ifelse broke this.)
|
|
self.assertEqual([ x for x in range(10) if x % 2 if x % 3 ], [1, 5, 7])
|
|
self.assertEqual(list(x for x in range(10) if x % 2 if x % 3), [1, 5, 7])
|
|
|
|
# verify unpacking single element tuples in listcomp/genexp.
|
|
self.assertEqual([x for x, in [(4,), (5,), (6,)]], [4, 5, 6])
|
|
self.assertEqual(list(x for x, in [(7,), (8,), (9,)]), [7, 8, 9])
|
|
|
|
def test_with_statement(self):
|
|
class manager(object):
|
|
def __enter__(self):
|
|
return (1, 2)
|
|
def __exit__(self, *args):
|
|
pass
|
|
|
|
with manager():
|
|
pass
|
|
with manager() as x:
|
|
pass
|
|
with manager() as (x, y):
|
|
pass
|
|
with manager(), manager():
|
|
pass
|
|
with manager() as x, manager() as y:
|
|
pass
|
|
with manager() as x, manager():
|
|
pass
|
|
|
|
def test_if_else_expr(self):
|
|
# Test ifelse expressions in various cases
|
|
def _checkeval(msg, ret):
|
|
"helper to check that evaluation of expressions is done correctly"
|
|
print(msg)
|
|
return ret
|
|
|
|
# the next line is not allowed anymore
|
|
#self.assertEqual([ x() for x in lambda: True, lambda: False if x() ], [True])
|
|
self.assertEqual([ x() for x in (lambda: True, lambda: False) if x() ], [True])
|
|
self.assertEqual([ x(False) for x in (lambda x: False if x else True, lambda x: True if x else False) if x(False) ], [True])
|
|
self.assertEqual((5 if 1 else _checkeval("check 1", 0)), 5)
|
|
self.assertEqual((_checkeval("check 2", 0) if 0 else 5), 5)
|
|
self.assertEqual((5 and 6 if 0 else 1), 1)
|
|
self.assertEqual(((5 and 6) if 0 else 1), 1)
|
|
self.assertEqual((5 and (6 if 1 else 1)), 6)
|
|
self.assertEqual((0 or _checkeval("check 3", 2) if 0 else 3), 3)
|
|
self.assertEqual((1 or _checkeval("check 4", 2) if 1 else _checkeval("check 5", 3)), 1)
|
|
self.assertEqual((0 or 5 if 1 else _checkeval("check 6", 3)), 5)
|
|
self.assertEqual((not 5 if 1 else 1), False)
|
|
self.assertEqual((not 5 if 0 else 1), 1)
|
|
self.assertEqual((6 + 1 if 1 else 2), 7)
|
|
self.assertEqual((6 - 1 if 1 else 2), 5)
|
|
self.assertEqual((6 * 2 if 1 else 4), 12)
|
|
self.assertEqual((6 / 2 if 1 else 3), 3)
|
|
self.assertEqual((6 < 4 if 0 else 2), 2)
|
|
|
|
def test_paren_evaluation(self):
|
|
self.assertEqual(16 // (4 // 2), 8)
|
|
self.assertEqual((16 // 4) // 2, 2)
|
|
self.assertEqual(16 // 4 // 2, 2)
|
|
self.assertTrue(False is (2 is 3))
|
|
self.assertFalse((False is 2) is 3)
|
|
self.assertFalse(False is 2 is 3)
|
|
|
|
def test_matrix_mul(self):
|
|
# This is not intended to be a comprehensive test, rather just to be few
|
|
# samples of the @ operator in test_grammar.py.
|
|
class M:
|
|
def __matmul__(self, o):
|
|
return 4
|
|
def __imatmul__(self, o):
|
|
self.other = o
|
|
return self
|
|
m = M()
|
|
self.assertEqual(m @ m, 4)
|
|
m @= 42
|
|
self.assertEqual(m.other, 42)
|
|
|
|
def test_async_await(self):
|
|
async def test():
|
|
def sum():
|
|
pass
|
|
if 1:
|
|
await someobj()
|
|
|
|
self.assertEqual(test.__name__, 'test')
|
|
self.assertTrue(bool(test.__code__.co_flags & inspect.CO_COROUTINE))
|
|
|
|
def decorator(func):
|
|
setattr(func, '_marked', True)
|
|
return func
|
|
|
|
@decorator
|
|
async def test2():
|
|
return 22
|
|
self.assertTrue(test2._marked)
|
|
self.assertEqual(test2.__name__, 'test2')
|
|
self.assertTrue(bool(test2.__code__.co_flags & inspect.CO_COROUTINE))
|
|
|
|
def test_async_for(self):
|
|
class Done(Exception): pass
|
|
|
|
class AIter:
|
|
def __aiter__(self):
|
|
return self
|
|
async def __anext__(self):
|
|
raise StopAsyncIteration
|
|
|
|
async def foo():
|
|
async for i in AIter():
|
|
pass
|
|
async for i, j in AIter():
|
|
pass
|
|
async for i in AIter():
|
|
pass
|
|
else:
|
|
pass
|
|
raise Done
|
|
|
|
with self.assertRaises(Done):
|
|
foo().send(None)
|
|
|
|
def test_async_with(self):
|
|
class Done(Exception): pass
|
|
|
|
class manager:
|
|
async def __aenter__(self):
|
|
return (1, 2)
|
|
async def __aexit__(self, *exc):
|
|
return False
|
|
|
|
async def foo():
|
|
async with manager():
|
|
pass
|
|
async with manager() as x:
|
|
pass
|
|
async with manager() as (x, y):
|
|
pass
|
|
async with manager(), manager():
|
|
pass
|
|
async with manager() as x, manager() as y:
|
|
pass
|
|
async with manager() as x, manager():
|
|
pass
|
|
raise Done
|
|
|
|
with self.assertRaises(Done):
|
|
foo().send(None)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|