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a8ef4572a6
* bpo-43497: Emit SyntaxWarnings for assertions with tuple constants. Add a test that shows that a tuple constant (a tuple, where all of its members are also compile-time constants) produces a SyntaxWarning. Then fix this failure. * Make SyntaxWarnings also work when "optimized". * Split tests for SyntaxWarning to SyntaxError conversion SyntaxWarnings emitted by the compiler when configured to be errors are actually raised as SyntaxError exceptions. Move these tests into their own method and add a test to ensure they are raised. Previously we only tested that they were not raised for a "valid" assertion statement.
1913 lines
61 KiB
Python
1913 lines
61 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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from test.support.warnings_helper import check_syntax_warning
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import inspect
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import unittest
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import sys
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import warnings
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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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from test.support import check_syntax_error
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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_bad_numerical_literals(self):
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check = self.check_syntax_error
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check("0b12", "invalid digit '2' in binary literal")
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check("0b1_2", "invalid digit '2' in binary literal")
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check("0b2", "invalid digit '2' in binary literal")
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check("0b1_", "invalid binary literal")
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check("0b", "invalid binary literal")
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check("0o18", "invalid digit '8' in octal literal")
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check("0o1_8", "invalid digit '8' in octal literal")
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check("0o8", "invalid digit '8' in octal literal")
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check("0o1_", "invalid octal literal")
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check("0o", "invalid octal literal")
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check("0x1_", "invalid hexadecimal literal")
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check("0x", "invalid hexadecimal literal")
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check("1_", "invalid decimal literal")
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check("012",
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"leading zeros in decimal integer literals are not permitted; "
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"use an 0o prefix for octal integers")
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check("1.2_", "invalid decimal literal")
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check("1e2_", "invalid decimal literal")
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check("1e+", "invalid decimal literal")
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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("was never closed", 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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from test.support import check_syntax_error
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from test.support.warnings_helper import check_syntax_warning
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from test.support.warnings_helper import check_no_warnings
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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'], repr('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': '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_var_annot_rhs(self):
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ns = {}
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exec('x: tuple = 1, 2', ns)
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self.assertEqual(ns['x'], (1, 2))
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stmt = ('def f():\n'
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' x: int = yield')
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exec(stmt, ns)
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self.assertEqual(list(ns['f']()), [None])
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ns = {"a": 1, 'b': (2, 3, 4), "c":5, "Tuple": typing.Tuple}
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exec('x: Tuple[int, ...] = a,*b,c', ns)
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self.assertEqual(ns['x'], (1, 2, 3, 4, 5))
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def test_funcdef(self):
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### [decorators] 'def' NAME parameters ['->' test] ':' suite
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### decorator: '@' namedexpr_test 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
|
|
def f3(two, arguments): pass
|
|
self.assertEqual(f2.__code__.co_varnames, ('one_argument',))
|
|
self.assertEqual(f3.__code__.co_varnames, ('two', 'arguments'))
|
|
def a1(one_arg,): pass
|
|
def a2(two, args,): pass
|
|
def v0(*rest): pass
|
|
def v1(a, *rest): pass
|
|
def v2(a, b, *rest): pass
|
|
|
|
f1()
|
|
f2(1)
|
|
f2(1,)
|
|
f3(1, 2)
|
|
f3(1, 2,)
|
|
v0()
|
|
v0(1)
|
|
v0(1,)
|
|
v0(1,2)
|
|
v0(1,2,3,4,5,6,7,8,9,0)
|
|
v1(1)
|
|
v1(1,)
|
|
v1(1,2)
|
|
v1(1,2,3)
|
|
v1(1,2,3,4,5,6,7,8,9,0)
|
|
v2(1,2)
|
|
v2(1,2,3)
|
|
v2(1,2,3,4)
|
|
v2(1,2,3,4,5,6,7,8,9,0)
|
|
|
|
def d01(a=1): pass
|
|
d01()
|
|
d01(1)
|
|
d01(*(1,))
|
|
d01(*[] or [2])
|
|
d01(*() or (), *{} and (), **() or {})
|
|
d01(**{'a':2})
|
|
d01(**{'a':2} or {})
|
|
def d11(a, b=1): pass
|
|
d11(1)
|
|
d11(1, 2)
|
|
d11(1, **{'b':2})
|
|
def d21(a, b, c=1): pass
|
|
d21(1, 2)
|
|
d21(1, 2, 3)
|
|
d21(*(1, 2, 3))
|
|
d21(1, *(2, 3))
|
|
d21(1, 2, *(3,))
|
|
d21(1, 2, **{'c':3})
|
|
def d02(a=1, b=2): pass
|
|
d02()
|
|
d02(1)
|
|
d02(1, 2)
|
|
d02(*(1, 2))
|
|
d02(1, *(2,))
|
|
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
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('ignore', BytesWarning)
|
|
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: int, /): pass
|
|
self.assertEqual(f.__annotations__, {'x': 'int'})
|
|
def f(x: int = 34, /): 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(a, b: 1, c: 2, d): pass
|
|
self.assertEqual(f.__annotations__, {'b': '1', 'c': '2'})
|
|
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'})
|
|
def f(a, b: 1, c: 2, d, e: 3 = 4, f: int = 5, /, *g: 6, h: 7, i=8, j: 9 = 10,
|
|
**k: 11) -> 12: pass
|
|
self.assertEqual(f.__annotations__,
|
|
{'b': '1', 'c': '2', 'e': '3', 'f': 'int', '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 expressions as decorators (PEP 614):
|
|
@False or null
|
|
def f(x): pass
|
|
@d := null
|
|
def f(x): pass
|
|
@lambda f: null(f)
|
|
def f(x): pass
|
|
@[..., null, ...][1]
|
|
def f(x): pass
|
|
@null(null)(null)
|
|
def f(x): pass
|
|
@[null][0].__call__.__call__
|
|
def f(x): pass
|
|
|
|
# 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)
|
|
|
|
x, y, z = "xyz"
|
|
del x
|
|
del y,
|
|
del (z)
|
|
del ()
|
|
|
|
a, b, c, d, e, f, g = "abcdefg"
|
|
del a, (b, c), (d, (e, f))
|
|
|
|
a, b, c, d, e, f, g = "abcdefg"
|
|
del a, [b, c], (d, [e, f])
|
|
|
|
abcd = list("abcd")
|
|
del abcd[1:2]
|
|
|
|
compile("del a, (b[0].c, (d.e, f.g[1:2])), [h.i.j], ()", "<testcase>", "exec")
|
|
|
|
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_star_expr]
|
|
def g1(): return
|
|
def g2(): return 1
|
|
def g3():
|
|
z = [2, 3]
|
|
return 1, *z
|
|
|
|
g1()
|
|
x = g2()
|
|
y = g3()
|
|
self.assertEqual(y, (1, 2, 3), "unparenthesized star expr return")
|
|
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_break_in_finally_after_return(self):
|
|
# See issue #37830
|
|
def g1(x):
|
|
for count in [0, 1]:
|
|
count2 = 0
|
|
while count2 < 20:
|
|
count2 += 10
|
|
try:
|
|
return count + count2
|
|
finally:
|
|
if x:
|
|
break
|
|
return 'end', count, count2
|
|
self.assertEqual(g1(False), 10)
|
|
self.assertEqual(g1(True), ('end', 1, 10))
|
|
|
|
def g2(x):
|
|
for count in [0, 1]:
|
|
for count2 in [10, 20]:
|
|
try:
|
|
return count + count2
|
|
finally:
|
|
if x:
|
|
break
|
|
return 'end', count, count2
|
|
self.assertEqual(g2(False), 10)
|
|
self.assertEqual(g2(True), ('end', 1, 10))
|
|
|
|
def test_continue_in_finally_after_return(self):
|
|
# See issue #37830
|
|
def g1(x):
|
|
count = 0
|
|
while count < 100:
|
|
count += 1
|
|
try:
|
|
return count
|
|
finally:
|
|
if x:
|
|
continue
|
|
return 'end', count
|
|
self.assertEqual(g1(False), 1)
|
|
self.assertEqual(g1(True), ('end', 100))
|
|
|
|
def g2(x):
|
|
for count in [0, 1]:
|
|
try:
|
|
return count
|
|
finally:
|
|
if x:
|
|
continue
|
|
return 'end', count
|
|
self.assertEqual(g2(False), 0)
|
|
self.assertEqual(g2(True), ('end', 1))
|
|
|
|
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)
|
|
# Do not require parenthesis for tuple unpacking
|
|
def g(): rest = 4, 5, 6; yield 1, 2, 3, *rest
|
|
self.assertEqual(list(g()), [(1, 2, 3, 4, 5, 6)])
|
|
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 ()")
|
|
|
|
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 test_assert_failures(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'")
|
|
|
|
def test_assert_syntax_warnings(self):
|
|
# Ensure that we warn users if they provide a non-zero length tuple as
|
|
# the assertion test.
|
|
self.check_syntax_warning('assert(x, "msg")',
|
|
'assertion is always true')
|
|
self.check_syntax_warning('assert(False, "msg")',
|
|
'assertion is always true')
|
|
self.check_syntax_warning('assert(False,)',
|
|
'assertion is always true')
|
|
|
|
with self.check_no_warnings(category=SyntaxWarning):
|
|
compile('assert x, "msg"', '<testcase>', 'exec')
|
|
compile('assert False, "msg"', '<testcase>', 'exec')
|
|
|
|
def test_assert_warning_promotes_to_syntax_error(self):
|
|
# If SyntaxWarning is configured to be an error, it actually raises a
|
|
# SyntaxError.
|
|
# https://bugs.python.org/issue35029
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('error', SyntaxWarning)
|
|
try:
|
|
compile('assert x, "msg" ', '<testcase>', 'exec')
|
|
except SyntaxError:
|
|
self.fail('SyntaxError incorrectly raised for \'assert x, "msg"\'')
|
|
with self.assertRaises(SyntaxError):
|
|
compile('assert(x, "msg")', '<testcase>', 'exec')
|
|
with self.assertRaises(SyntaxError):
|
|
compile('assert(False, "msg")', '<testcase>', 'exec')
|
|
with self.assertRaises(SyntaxError):
|
|
compile('assert(False,)', '<testcase>', 'exec')
|
|
|
|
|
|
### 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' NAME]]
|
|
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
|
|
with self.assertRaises(SyntaxError):
|
|
compile("try:\n pass\nexcept Exception as a.b:\n pass", "?", "exec")
|
|
compile("try:\n pass\nexcept Exception as a[b]:\n pass", "?", "exec")
|
|
|
|
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 x is x: pass
|
|
if x is not x: pass
|
|
if 1 in (): pass
|
|
if 1 not in (): pass
|
|
if 1 < 1 > 1 == 1 >= 1 <= 1 != 1 in 1 not in x is x is not x: pass
|
|
|
|
def test_comparison_is_literal(self):
|
|
def check(test, msg='"is" with a literal'):
|
|
self.check_syntax_warning(test, msg)
|
|
|
|
check('x is 1')
|
|
check('x is "thing"')
|
|
check('1 is x')
|
|
check('x is y is 1')
|
|
check('x is not 1', '"is not" with a literal')
|
|
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('error', SyntaxWarning)
|
|
compile('x is None', '<testcase>', 'exec')
|
|
compile('x is False', '<testcase>', 'exec')
|
|
compile('x is True', '<testcase>', 'exec')
|
|
compile('x is ...', '<testcase>', 'exec')
|
|
|
|
def test_warn_missed_comma(self):
|
|
def check(test):
|
|
self.check_syntax_warning(test, msg)
|
|
|
|
msg=r'is not callable; perhaps you missed a comma\?'
|
|
check('[(1, 2) (3, 4)]')
|
|
check('[(x, y) (3, 4)]')
|
|
check('[[1, 2] (3, 4)]')
|
|
check('[{1, 2} (3, 4)]')
|
|
check('[{1: 2} (3, 4)]')
|
|
check('[[i for i in range(5)] (3, 4)]')
|
|
check('[{i for i in range(5)} (3, 4)]')
|
|
check('[(i for i in range(5)) (3, 4)]')
|
|
check('[{i: i for i in range(5)} (3, 4)]')
|
|
check('[f"{x}" (3, 4)]')
|
|
check('[f"x={x}" (3, 4)]')
|
|
check('["abc" (3, 4)]')
|
|
check('[b"abc" (3, 4)]')
|
|
check('[123 (3, 4)]')
|
|
check('[12.3 (3, 4)]')
|
|
check('[12.3j (3, 4)]')
|
|
check('[None (3, 4)]')
|
|
check('[True (3, 4)]')
|
|
check('[... (3, 4)]')
|
|
|
|
msg=r'is not subscriptable; perhaps you missed a comma\?'
|
|
check('[{1, 2} [i, j]]')
|
|
check('[{i for i in range(5)} [i, j]]')
|
|
check('[(i for i in range(5)) [i, j]]')
|
|
check('[(lambda x, y: x) [i, j]]')
|
|
check('[123 [i, j]]')
|
|
check('[12.3 [i, j]]')
|
|
check('[12.3j [i, j]]')
|
|
check('[None [i, j]]')
|
|
check('[True [i, j]]')
|
|
check('[... [i, j]]')
|
|
|
|
msg=r'indices must be integers or slices, not tuple; perhaps you missed a comma\?'
|
|
check('[(1, 2) [i, j]]')
|
|
check('[(x, y) [i, j]]')
|
|
check('[[1, 2] [i, j]]')
|
|
check('[[i for i in range(5)] [i, j]]')
|
|
check('[f"{x}" [i, j]]')
|
|
check('[f"x={x}" [i, j]]')
|
|
check('["abc" [i, j]]')
|
|
check('[b"abc" [i, j]]')
|
|
|
|
msg=r'indices must be integers or slices, not tuple;'
|
|
check('[[1, 2] [3, 4]]')
|
|
msg=r'indices must be integers or slices, not list;'
|
|
check('[[1, 2] [[3, 4]]]')
|
|
check('[[1, 2] [[i for i in range(5)]]]')
|
|
msg=r'indices must be integers or slices, not set;'
|
|
check('[[1, 2] [{3, 4}]]')
|
|
check('[[1, 2] [{i for i in range(5)}]]')
|
|
msg=r'indices must be integers or slices, not dict;'
|
|
check('[[1, 2] [{3: 4}]]')
|
|
check('[[1, 2] [{i: i for i in range(5)}]]')
|
|
msg=r'indices must be integers or slices, not generator;'
|
|
check('[[1, 2] [(i for i in range(5))]]')
|
|
msg=r'indices must be integers or slices, not function;'
|
|
check('[[1, 2] [(lambda x, y: x)]]')
|
|
msg=r'indices must be integers or slices, not str;'
|
|
check('[[1, 2] [f"{x}"]]')
|
|
check('[[1, 2] [f"x={x}"]]')
|
|
check('[[1, 2] ["abc"]]')
|
|
msg=r'indices must be integers or slices, not'
|
|
check('[[1, 2] [b"abc"]]')
|
|
check('[[1, 2] [12.3]]')
|
|
check('[[1, 2] [12.3j]]')
|
|
check('[[1, 2] [None]]')
|
|
check('[[1, 2] [...]]')
|
|
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('error', SyntaxWarning)
|
|
compile('[(lambda x, y: x) (3, 4)]', '<testcase>', 'exec')
|
|
compile('[[1, 2] [i]]', '<testcase>', 'exec')
|
|
compile('[[1, 2] [0]]', '<testcase>', 'exec')
|
|
compile('[[1, 2] [True]]', '<testcase>', 'exec')
|
|
compile('[[1, 2] [1:2]]', '<testcase>', 'exec')
|
|
compile('[{(1, 2): 3} [i, j]]', '<testcase>', 'exec')
|
|
|
|
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: '@' namedexpr_test NEWLINE
|
|
# decorators: decorator+
|
|
# decorated: decorators (classdef | funcdef)
|
|
def class_decorator(x): return x
|
|
@class_decorator
|
|
class G: pass
|
|
|
|
# Test expressions as decorators (PEP 614):
|
|
@False or class_decorator
|
|
class H: pass
|
|
@d := class_decorator
|
|
class I: pass
|
|
@lambda c: class_decorator(c)
|
|
class J: pass
|
|
@[..., class_decorator, ...][1]
|
|
class K: pass
|
|
@class_decorator(class_decorator)(class_decorator)
|
|
class L: pass
|
|
@[class_decorator][0].__call__.__call__
|
|
class M: 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
|
|
|
|
with (
|
|
manager()
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager() as x
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager() as (x, y),
|
|
manager() as z,
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager(),
|
|
manager()
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager() as x,
|
|
manager() as y
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager() as x,
|
|
manager()
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager() as x,
|
|
manager() as y,
|
|
manager() as z,
|
|
):
|
|
pass
|
|
|
|
with (
|
|
manager() as x,
|
|
manager() as y,
|
|
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)
|
|
x = 2
|
|
y = 3
|
|
self.assertTrue(False is (x is y))
|
|
self.assertFalse((False is x) is y)
|
|
self.assertFalse(False is x is y)
|
|
|
|
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()
|