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f17ab89c77
svn+ssh://pythondev@svn.python.org/python/trunk ........ r73031 | benjamin.peterson | 2009-05-29 16:48:19 -0500 (Fri, 29 May 2009) | 1 line add with statements ........
924 lines
30 KiB
Python
924 lines
30 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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# NOTE: When you run this test as a script from the command line, you
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# get warnings about certain hex/oct constants. Since those are
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# issued by the parser, you can't suppress them by adding a
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# filterwarnings() call to this module. Therefore, to shut up the
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# regression test, the filterwarnings() call has been added to
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# regrtest.py.
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from test.support import run_unittest, check_syntax_error
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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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class TokenTests(unittest.TestCase):
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def testBackslash(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.assertEquals(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.assertEquals(x, 0, 'backslash ending comment')
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def testPlainIntegers(self):
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self.assertEquals(type(000), type(0))
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self.assertEquals(0xff, 255)
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self.assertEquals(0o377, 255)
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self.assertEquals(2147483647, 0o17777777777)
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self.assertEquals(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.assertEquals(-2147483647-1, -0o20000000000)
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# XXX -2147483648
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self.assert_(0o37777777777 > 0)
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self.assert_(0xffffffff > 0)
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self.assert_(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.assertEquals(-9223372036854775807-1, -0o1000000000000000000000)
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self.assert_(0o1777777777777777777777 > 0)
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self.assert_(0xffffffffffffffff > 0)
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self.assert_(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 testLongIntegers(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 testFloats(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 testStringLiterals(self):
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x = ''; y = ""; self.assert_(len(x) == 0 and x == y)
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x = '\''; y = "'"; self.assert_(len(x) == 1 and x == y and ord(x) == 39)
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x = '"'; y = "\""; self.assert_(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.assert_(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.assert_(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.assertEquals(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.assertEquals(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.assertEquals(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.assertEquals(x, y)
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def testEllipsis(self):
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x = ...
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self.assert_(x is Ellipsis)
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self.assertRaises(SyntaxError, eval, ".. .")
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class GrammarTests(unittest.TestCase):
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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 testEvalInput(self):
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# testlist ENDMARKER
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x = eval('1, 0 or 1')
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def testFuncdef(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.assertEquals(f2.__code__.co_varnames, ('one_argument',))
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self.assertEquals(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(**{'a':2})
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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})
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d02(**{'a': 1, 'b': 2})
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def d12(a, b=1, c=2): pass
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d12(1)
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d12(1, 2)
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d12(1, 2, 3)
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def d22(a, b, c=1, d=2): pass
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d22(1, 2)
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d22(1, 2, 3)
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d22(1, 2, 3, 4)
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def d01v(a=1, *rest): pass
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d01v()
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d01v(1)
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d01v(1, 2)
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d01v(*(1, 2, 3, 4))
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d01v(*(1,))
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d01v(**{'a':2})
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def d11v(a, b=1, *rest): pass
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d11v(1)
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d11v(1, 2)
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d11v(1, 2, 3)
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def d21v(a, b, c=1, *rest): pass
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d21v(1, 2)
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d21v(1, 2, 3)
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d21v(1, 2, 3, 4)
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d21v(*(1, 2, 3, 4))
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d21v(1, 2, **{'c': 3})
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def d02v(a=1, b=2, *rest): pass
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d02v()
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d02v(1)
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d02v(1, 2)
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d02v(1, 2, 3)
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d02v(1, *(2, 3, 4))
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d02v(**{'a': 1, 'b': 2})
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def d12v(a, b=1, c=2, *rest): pass
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d12v(1)
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d12v(1, 2)
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d12v(1, 2, 3)
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d12v(1, 2, 3, 4)
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d12v(*(1, 2, 3, 4))
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d12v(1, 2, *(3, 4, 5))
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d12v(1, *(2,), **{'c': 3})
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def d22v(a, b, c=1, d=2, *rest): pass
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d22v(1, 2)
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d22v(1, 2, 3)
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d22v(1, 2, 3, 4)
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d22v(1, 2, 3, 4, 5)
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d22v(*(1, 2, 3, 4))
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d22v(1, 2, *(3, 4, 5))
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d22v(1, *(2, 3), **{'d': 4})
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# keyword argument type tests
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try:
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str('x', **{b'foo':1 })
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except TypeError:
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pass
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else:
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self.fail('Bytes should not work as keyword argument names')
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# keyword only argument tests
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def pos0key1(*, key): return key
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pos0key1(key=100)
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def pos2key2(p1, p2, *, k1, k2=100): return p1,p2,k1,k2
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pos2key2(1, 2, k1=100)
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pos2key2(1, 2, k1=100, k2=200)
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pos2key2(1, 2, k2=100, k1=200)
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def pos2key2dict(p1, p2, *, k1=100, k2, **kwarg): return p1,p2,k1,k2,kwarg
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pos2key2dict(1,2,k2=100,tokwarg1=100,tokwarg2=200)
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pos2key2dict(1,2,tokwarg1=100,tokwarg2=200, k2=100)
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# keyword arguments after *arglist
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def f(*args, **kwargs):
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return args, kwargs
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self.assertEquals(f(1, x=2, *[3, 4], y=5), ((1, 3, 4),
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{'x':2, 'y':5}))
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self.assertRaises(SyntaxError, eval, "f(1, *(2,3), 4)")
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self.assertRaises(SyntaxError, eval, "f(1, x=2, *(3,4), x=5)")
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# argument annotation tests
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def f(x) -> list: pass
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self.assertEquals(f.__annotations__, {'return': list})
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def f(x:int): pass
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self.assertEquals(f.__annotations__, {'x': int})
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def f(*x:str): pass
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self.assertEquals(f.__annotations__, {'x': str})
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def f(**x:float): pass
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self.assertEquals(f.__annotations__, {'x': float})
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def f(x, y:1+2): pass
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self.assertEquals(f.__annotations__, {'y': 3})
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def f(a, b:1, c:2, d): pass
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self.assertEquals(f.__annotations__, {'b': 1, 'c': 2})
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def f(a, b:1, c:2, d, e:3=4, f=5, *g:6): pass
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self.assertEquals(f.__annotations__,
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{'b': 1, 'c': 2, 'e': 3, 'g': 6})
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def f(a, b:1, c:2, d, e:3=4, f=5, *g:6, h:7, i=8, j:9=10,
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**k:11) -> 12: pass
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self.assertEquals(f.__annotations__,
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{'b': 1, 'c': 2, 'e': 3, 'g': 6, 'h': 7, 'j': 9,
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'k': 11, 'return': 12})
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# Check for SF Bug #1697248 - mixing decorators and a return annotation
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def null(x): return x
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@null
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def f(x) -> list: pass
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self.assertEquals(f.__annotations__, {'return': list})
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# test MAKE_CLOSURE with a variety of oparg's
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closure = 1
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def f(): return closure
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def f(x=1): return closure
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def f(*, k=1): return closure
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def f() -> int: return closure
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# Check ast errors in *args and *kwargs
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check_syntax_error(self, "f(*g(1=2))")
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check_syntax_error(self, "f(**g(1=2))")
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def testLambdef(self):
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### lambdef: 'lambda' [varargslist] ':' test
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l1 = lambda : 0
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self.assertEquals(l1(), 0)
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l2 = lambda : a[d] # XXX just testing the expression
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l3 = lambda : [2 < x for x in [-1, 3, 0]]
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self.assertEquals(l3(), [0, 1, 0])
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l4 = lambda x = lambda y = lambda z=1 : z : y() : x()
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self.assertEquals(l4(), 1)
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l5 = lambda x, y, z=2: x + y + z
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self.assertEquals(l5(1, 2), 5)
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self.assertEquals(l5(1, 2, 3), 6)
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check_syntax_error(self, "lambda x: x = 2")
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check_syntax_error(self, "lambda (None,): None")
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l6 = lambda x, y, *, k=20: x+y+k
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self.assertEquals(l6(1,2), 1+2+20)
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self.assertEquals(l6(1,2,k=10), 1+2+10)
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### stmt: simple_stmt | compound_stmt
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# Tested below
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def testSimpleStmt(self):
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### simple_stmt: small_stmt (';' small_stmt)* [';']
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x = 1; pass; del x
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def foo():
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# verify statments that end with semi-colons
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x = 1; pass; del x;
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foo()
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### small_stmt: expr_stmt | pass_stmt | del_stmt | flow_stmt | import_stmt | global_stmt | access_stmt
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# Tested below
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def testExprStmt(self):
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# (exprlist '=')* exprlist
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1
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1, 2, 3
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x = 1
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x = 1, 2, 3
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x = y = z = 1, 2, 3
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x, y, z = 1, 2, 3
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abc = a, b, c = x, y, z = xyz = 1, 2, (3, 4)
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check_syntax_error(self, "x + 1 = 1")
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check_syntax_error(self, "a + 1 = b + 2")
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def testDelStmt(self):
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# 'del' exprlist
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abc = [1,2,3]
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x, y, z = abc
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xyz = x, y, z
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del abc
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del x, y, (z, xyz)
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def testPassStmt(self):
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# 'pass'
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pass
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# flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt
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# Tested below
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def testBreakStmt(self):
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# 'break'
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while 1: break
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def testContinueStmt(self):
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# 'continue'
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i = 1
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while i: i = 0; continue
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msg = ""
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while not msg:
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msg = "ok"
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try:
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continue
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msg = "continue failed to continue inside try"
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except:
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msg = "continue inside try called except block"
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if msg != "ok":
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self.fail(msg)
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msg = ""
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while not msg:
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msg = "finally block not called"
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try:
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continue
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finally:
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msg = "ok"
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if msg != "ok":
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self.fail(msg)
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def test_break_continue_loop(self):
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# This test warrants an explanation. It is a test specifically for SF bugs
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# #463359 and #462937. The bug is that a 'break' statement executed or
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# exception raised inside a try/except inside a loop, *after* a continue
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# statement has been executed in that loop, will cause the wrong number of
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# arguments to be popped off the stack and the instruction pointer reset to
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# a very small number (usually 0.) Because of this, the following test
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# *must* written as a function, and the tracking vars *must* be function
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# arguments with default values. Otherwise, the test will loop and loop.
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def test_inner(extra_burning_oil = 1, count=0):
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big_hippo = 2
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while big_hippo:
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count += 1
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try:
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if extra_burning_oil and big_hippo == 1:
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extra_burning_oil -= 1
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break
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big_hippo -= 1
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continue
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except:
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raise
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if count > 2 or big_hippo != 1:
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self.fail("continue then break in try/except in loop broken!")
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test_inner()
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def testReturn(self):
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# 'return' [testlist]
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def g1(): return
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def g2(): return 1
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g1()
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x = g2()
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check_syntax_error(self, "class foo:return 1")
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def testYield(self):
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check_syntax_error(self, "class foo:yield 1")
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def testRaise(self):
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# 'raise' test [',' test]
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try: raise RuntimeError('just testing')
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except RuntimeError: pass
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try: raise KeyboardInterrupt
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except KeyboardInterrupt: pass
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def testImport(self):
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# 'import' dotted_as_names
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import sys
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import time, sys
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# 'from' dotted_name 'import' ('*' | '(' import_as_names ')' | import_as_names)
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from time import time
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from time import (time)
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# not testable inside a function, but already done at top of the module
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# from sys import *
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from sys import path, argv
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from sys import (path, argv)
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from sys import (path, argv,)
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def testGlobal(self):
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# 'global' NAME (',' NAME)*
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global a
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global a, b
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global one, two, three, four, five, six, seven, eight, nine, ten
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def testNonlocal(self):
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# 'nonlocal' NAME (',' NAME)*
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x = 0
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y = 0
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def f():
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nonlocal x
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nonlocal x, y
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def testAssert(self):
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# assert_stmt: 'assert' test [',' test]
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assert 1
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assert 1, 1
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assert lambda x:x
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assert 1, lambda x:x+1
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try:
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assert 0, "msg"
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except AssertionError as e:
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self.assertEquals(e.args[0], "msg")
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else:
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if __debug__:
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self.fail("AssertionError not raised by assert 0")
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### compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef
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# Tested below
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def testIf(self):
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# 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
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if 1: pass
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if 1: pass
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else: pass
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if 0: pass
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elif 0: pass
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if 0: pass
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elif 0: pass
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elif 0: pass
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elif 0: pass
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else: pass
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def testWhile(self):
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# 'while' test ':' suite ['else' ':' suite]
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while 0: pass
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while 0: pass
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else: pass
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# Issue1920: "while 0" is optimized away,
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# ensure that the "else" clause is still present.
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x = 0
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while 0:
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x = 1
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else:
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x = 2
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self.assertEquals(x, 2)
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def testFor(self):
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# 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite]
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for i in 1, 2, 3: pass
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for i, j, k in (): pass
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else: pass
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class Squares:
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def __init__(self, max):
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self.max = max
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self.sofar = []
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def __len__(self): return len(self.sofar)
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def __getitem__(self, i):
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if not 0 <= i < self.max: raise IndexError
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n = len(self.sofar)
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while n <= i:
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self.sofar.append(n*n)
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n = n+1
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return self.sofar[i]
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n = 0
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for x in Squares(10): n = n+x
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if n != 285:
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self.fail('for over growing sequence')
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result = []
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for x, in [(1,), (2,), (3,)]:
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result.append(x)
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self.assertEqual(result, [1, 2, 3])
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def testTry(self):
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### try_stmt: 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite]
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### | 'try' ':' suite 'finally' ':' suite
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### except_clause: 'except' [expr ['as' expr]]
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try:
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1/0
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except ZeroDivisionError:
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pass
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else:
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pass
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try: 1/0
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except EOFError: pass
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except TypeError as msg: pass
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except RuntimeError as msg: pass
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except: pass
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else: pass
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try: 1/0
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except (EOFError, TypeError, ZeroDivisionError): pass
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try: 1/0
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except (EOFError, TypeError, ZeroDivisionError) as msg: pass
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try: pass
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finally: pass
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def testSuite(self):
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# simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT
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if 1: pass
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if 1:
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pass
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if 1:
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#
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#
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#
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pass
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pass
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#
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pass
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#
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def testTest(self):
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### and_test ('or' and_test)*
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### and_test: not_test ('and' not_test)*
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### not_test: 'not' not_test | comparison
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if not 1: pass
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if 1 and 1: pass
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if 1 or 1: pass
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if not not not 1: pass
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if not 1 and 1 and 1: pass
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if 1 and 1 or 1 and 1 and 1 or not 1 and 1: pass
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def testComparison(self):
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### comparison: expr (comp_op expr)*
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### comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is'|'is' 'not'
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if 1: pass
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x = (1 == 1)
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if 1 == 1: pass
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if 1 != 1: pass
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if 1 < 1: pass
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if 1 > 1: pass
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if 1 <= 1: pass
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if 1 >= 1: pass
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if 1 is 1: pass
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if 1 is not 1: pass
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if 1 in (): pass
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if 1 not in (): pass
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if 1 < 1 > 1 == 1 >= 1 <= 1 != 1 in 1 not in 1 is 1 is not 1: pass
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def testBinaryMaskOps(self):
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x = 1 & 1
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x = 1 ^ 1
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x = 1 | 1
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def testShiftOps(self):
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x = 1 << 1
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x = 1 >> 1
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x = 1 << 1 >> 1
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def testAdditiveOps(self):
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x = 1
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x = 1 + 1
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x = 1 - 1 - 1
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x = 1 - 1 + 1 - 1 + 1
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def testMultiplicativeOps(self):
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x = 1 * 1
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x = 1 / 1
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x = 1 % 1
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x = 1 / 1 * 1 % 1
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def testUnaryOps(self):
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x = +1
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x = -1
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x = ~1
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x = ~1 ^ 1 & 1 | 1 & 1 ^ -1
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x = -1*1/1 + 1*1 - ---1*1
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def testSelectors(self):
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### trailer: '(' [testlist] ')' | '[' subscript ']' | '.' NAME
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### subscript: expr | [expr] ':' [expr]
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import sys, time
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c = sys.path[0]
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x = time.time()
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x = sys.modules['time'].time()
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a = '01234'
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c = a[0]
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c = a[-1]
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s = a[0:5]
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s = a[:5]
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s = a[0:]
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s = a[:]
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s = a[-5:]
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s = a[:-1]
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s = a[-4:-3]
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# A rough test of SF bug 1333982. http://python.org/sf/1333982
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# The testing here is fairly incomplete.
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# Test cases should include: commas with 1 and 2 colons
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d = {}
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d[1] = 1
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d[1,] = 2
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d[1,2] = 3
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d[1,2,3] = 4
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L = list(d)
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L.sort(key=lambda x: x if isinstance(x, tuple) else ())
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self.assertEquals(str(L), '[1, (1,), (1, 2), (1, 2, 3)]')
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def testAtoms(self):
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### atom: '(' [testlist] ')' | '[' [testlist] ']' | '{' [dictsetmaker] '}' | NAME | NUMBER | STRING
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### dictsetmaker: (test ':' test (',' test ':' test)* [',']) | (test (',' test)* [','])
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x = (1)
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x = (1 or 2 or 3)
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x = (1 or 2 or 3, 2, 3)
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x = []
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x = [1]
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x = [1 or 2 or 3]
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x = [1 or 2 or 3, 2, 3]
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x = []
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x = {}
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x = {'one': 1}
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x = {'one': 1,}
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x = {'one' or 'two': 1 or 2}
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x = {'one': 1, 'two': 2}
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x = {'one': 1, 'two': 2,}
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x = {'one': 1, 'two': 2, 'three': 3, 'four': 4, 'five': 5, 'six': 6}
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x = {'one'}
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x = {'one', 1,}
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x = {'one', 'two', 'three'}
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x = {2, 3, 4,}
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x = x
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x = 'x'
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x = 123
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### exprlist: expr (',' expr)* [',']
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### testlist: test (',' test)* [',']
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# These have been exercised enough above
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def testClassdef(self):
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# 'class' NAME ['(' [testlist] ')'] ':' suite
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class B: pass
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class B2(): pass
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class C1(B): pass
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class C2(B): pass
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class D(C1, C2, B): pass
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class C:
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def meth1(self): pass
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def meth2(self, arg): pass
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def meth3(self, a1, a2): pass
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# decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
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# decorators: decorator+
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# decorated: decorators (classdef | funcdef)
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def class_decorator(x): return x
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@class_decorator
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class G: pass
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def testDictcomps(self):
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# dictorsetmaker: ( (test ':' test (comp_for |
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# (',' test ':' test)* [','])) |
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# (test (comp_for | (',' test)* [','])) )
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nums = [1, 2, 3]
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self.assertEqual({i:i+1 for i in nums}, {1: 2, 2: 3, 3: 4})
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def testListcomps(self):
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# list comprehension tests
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nums = [1, 2, 3, 4, 5]
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strs = ["Apple", "Banana", "Coconut"]
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spcs = [" Apple", " Banana ", "Coco nut "]
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self.assertEqual([s.strip() for s in spcs], ['Apple', 'Banana', 'Coco nut'])
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self.assertEqual([3 * x for x in nums], [3, 6, 9, 12, 15])
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self.assertEqual([x for x in nums if x > 2], [3, 4, 5])
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self.assertEqual([(i, s) for i in nums for s in strs],
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[(1, 'Apple'), (1, 'Banana'), (1, 'Coconut'),
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(2, 'Apple'), (2, 'Banana'), (2, 'Coconut'),
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(3, 'Apple'), (3, 'Banana'), (3, 'Coconut'),
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(4, 'Apple'), (4, 'Banana'), (4, 'Coconut'),
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(5, 'Apple'), (5, 'Banana'), (5, 'Coconut')])
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self.assertEqual([(i, s) for i in nums for s in [f for f in strs if "n" in f]],
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[(1, 'Banana'), (1, 'Coconut'), (2, 'Banana'), (2, 'Coconut'),
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(3, 'Banana'), (3, 'Coconut'), (4, 'Banana'), (4, 'Coconut'),
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(5, 'Banana'), (5, 'Coconut')])
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self.assertEqual([(lambda a:[a**i for i in range(a+1)])(j) for j in range(5)],
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[[1], [1, 1], [1, 2, 4], [1, 3, 9, 27], [1, 4, 16, 64, 256]])
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def test_in_func(l):
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return [0 < x < 3 for x in l if x > 2]
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self.assertEqual(test_in_func(nums), [False, False, False])
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def test_nested_front():
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self.assertEqual([[y for y in [x, x + 1]] for x in [1,3,5]],
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[[1, 2], [3, 4], [5, 6]])
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test_nested_front()
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check_syntax_error(self, "[i, s for i in nums for s in strs]")
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check_syntax_error(self, "[x if y]")
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suppliers = [
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(1, "Boeing"),
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(2, "Ford"),
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(3, "Macdonalds")
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]
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parts = [
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(10, "Airliner"),
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(20, "Engine"),
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(30, "Cheeseburger")
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]
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suppart = [
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(1, 10), (1, 20), (2, 20), (3, 30)
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]
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x = [
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(sname, pname)
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for (sno, sname) in suppliers
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for (pno, pname) in parts
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for (sp_sno, sp_pno) in suppart
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if sno == sp_sno and pno == sp_pno
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]
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self.assertEqual(x, [('Boeing', 'Airliner'), ('Boeing', 'Engine'), ('Ford', 'Engine'),
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('Macdonalds', 'Cheeseburger')])
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def testGenexps(self):
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# generator expression tests
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g = ([x for x in range(10)] for x in range(1))
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self.assertEqual(next(g), [x for x in range(10)])
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try:
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next(g)
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self.fail('should produce StopIteration exception')
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except StopIteration:
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pass
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a = 1
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try:
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g = (a for d in a)
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next(g)
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self.fail('should produce TypeError')
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except TypeError:
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pass
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self.assertEqual(list((x, y) for x in 'abcd' for y in 'abcd'), [(x, y) for x in 'abcd' for y in 'abcd'])
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self.assertEqual(list((x, y) for x in 'ab' for y in 'xy'), [(x, y) for x in 'ab' for y in 'xy'])
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a = [x for x in range(10)]
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b = (x for x in (y for y in a))
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self.assertEqual(sum(b), sum([x for x in range(10)]))
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self.assertEqual(sum(x**2 for x in range(10)), sum([x**2 for x in range(10)]))
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self.assertEqual(sum(x*x for x in range(10) if x%2), sum([x*x for x in range(10) if x%2]))
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self.assertEqual(sum(x for x in (y for y in range(10))), sum([x for x in range(10)]))
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self.assertEqual(sum(x for x in (y for y in (z for z in range(10)))), sum([x for x in range(10)]))
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self.assertEqual(sum(x for x in [y for y in (z for z in range(10))]), sum([x for x in range(10)]))
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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)]))
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self.assertEqual(sum(x for x in (y for y in (z for z in range(10) if True) if False) if True), 0)
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check_syntax_error(self, "foo(x for x in range(10), 100)")
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check_syntax_error(self, "foo(100, x for x in range(10))")
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def testComprehensionSpecials(self):
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# test for outmost iterable precomputation
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x = 10; g = (i for i in range(x)); x = 5
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self.assertEqual(len(list(g)), 10)
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# This should hold, since we're only precomputing outmost iterable.
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x = 10; t = False; g = ((i,j) for i in range(x) if t for j in range(x))
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x = 5; t = True;
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self.assertEqual([(i,j) for i in range(10) for j in range(5)], list(g))
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# Grammar allows multiple adjacent 'if's in listcomps and genexps,
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# even though it's silly. Make sure it works (ifelse broke this.)
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self.assertEqual([ x for x in range(10) if x % 2 if x % 3 ], [1, 5, 7])
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self.assertEqual(list(x for x in range(10) if x % 2 if x % 3), [1, 5, 7])
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# verify unpacking single element tuples in listcomp/genexp.
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self.assertEqual([x for x, in [(4,), (5,), (6,)]], [4, 5, 6])
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self.assertEqual(list(x for x, in [(7,), (8,), (9,)]), [7, 8, 9])
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def test_with_statement(self):
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class manager(object):
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def __enter__(self):
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return (1, 2)
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def __exit__(self, *args):
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pass
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with manager():
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pass
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with manager() as x:
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pass
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with manager() as (x, y):
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pass
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with manager(), manager():
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pass
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with manager() as x, manager() as y:
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pass
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with manager() as x, manager():
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pass
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|
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def testIfElseExpr(self):
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# Test ifelse expressions in various cases
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def _checkeval(msg, ret):
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"helper to check that evaluation of expressions is done correctly"
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print(x)
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return ret
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|
|
# the next line is not allowed anymore
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#self.assertEqual([ x() for x in lambda: True, lambda: False if x() ], [True])
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self.assertEqual([ x() for x in (lambda: True, lambda: False) if x() ], [True])
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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])
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self.assertEqual((5 if 1 else _checkeval("check 1", 0)), 5)
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self.assertEqual((_checkeval("check 2", 0) if 0 else 5), 5)
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self.assertEqual((5 and 6 if 0 else 1), 1)
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self.assertEqual(((5 and 6) if 0 else 1), 1)
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self.assertEqual((5 and (6 if 1 else 1)), 6)
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self.assertEqual((0 or _checkeval("check 3", 2) if 0 else 3), 3)
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self.assertEqual((1 or _checkeval("check 4", 2) if 1 else _checkeval("check 5", 3)), 1)
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self.assertEqual((0 or 5 if 1 else _checkeval("check 6", 3)), 5)
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self.assertEqual((not 5 if 1 else 1), False)
|
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self.assertEqual((not 5 if 0 else 1), 1)
|
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self.assertEqual((6 + 1 if 1 else 2), 7)
|
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self.assertEqual((6 - 1 if 1 else 2), 5)
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self.assertEqual((6 * 2 if 1 else 4), 12)
|
|
self.assertEqual((6 / 2 if 1 else 3), 3)
|
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self.assertEqual((6 < 4 if 0 else 2), 2)
|
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|
|
|
|
def test_main():
|
|
run_unittest(TokenTests, GrammarTests)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|