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Diffstat (limited to 'lib/python2.7/lib2to3/tests/data/py3_test_grammar.py')
-rw-r--r-- | lib/python2.7/lib2to3/tests/data/py3_test_grammar.py | 923 |
1 files changed, 0 insertions, 923 deletions
diff --git a/lib/python2.7/lib2to3/tests/data/py3_test_grammar.py b/lib/python2.7/lib2to3/tests/data/py3_test_grammar.py deleted file mode 100644 index c0bf7f2..0000000 --- a/lib/python2.7/lib2to3/tests/data/py3_test_grammar.py +++ /dev/null @@ -1,923 +0,0 @@ -# Python test set -- part 1, grammar. -# This just tests whether the parser accepts them all. - -# NOTE: When you run this test as a script from the command line, you -# get warnings about certain hex/oct constants. Since those are -# issued by the parser, you can't suppress them by adding a -# filterwarnings() call to this module. Therefore, to shut up the -# regression test, the filterwarnings() call has been added to -# regrtest.py. - -from test.support import run_unittest, check_syntax_error -import unittest -import sys -# testing import * -from sys import * - -class TokenTests(unittest.TestCase): - - def testBackslash(self): - # Backslash means line continuation: - x = 1 \ - + 1 - self.assertEquals(x, 2, 'backslash for line continuation') - - # Backslash does not means continuation in comments :\ - x = 0 - self.assertEquals(x, 0, 'backslash ending comment') - - def testPlainIntegers(self): - self.assertEquals(type(000), type(0)) - self.assertEquals(0xff, 255) - self.assertEquals(0o377, 255) - self.assertEquals(2147483647, 0o17777777777) - self.assertEquals(0b1001, 9) - # "0x" is not a valid literal - self.assertRaises(SyntaxError, eval, "0x") - from sys import maxsize - if maxsize == 2147483647: - self.assertEquals(-2147483647-1, -0o20000000000) - # XXX -2147483648 - self.assert_(0o37777777777 > 0) - self.assert_(0xffffffff > 0) - self.assert_(0b1111111111111111111111111111111 > 0) - for s in ('2147483648', '0o40000000000', '0x100000000', - '0b10000000000000000000000000000000'): - try: - x = eval(s) - except OverflowError: - self.fail("OverflowError on huge integer literal %r" % s) - elif maxsize == 9223372036854775807: - self.assertEquals(-9223372036854775807-1, -0o1000000000000000000000) - self.assert_(0o1777777777777777777777 > 0) - self.assert_(0xffffffffffffffff > 0) - self.assert_(0b11111111111111111111111111111111111111111111111111111111111111 > 0) - for s in '9223372036854775808', '0o2000000000000000000000', \ - '0x10000000000000000', \ - '0b100000000000000000000000000000000000000000000000000000000000000': - try: - x = eval(s) - except OverflowError: - self.fail("OverflowError on huge integer literal %r" % s) - else: - self.fail('Weird maxsize value %r' % maxsize) - - def testLongIntegers(self): - x = 0 - x = 0xffffffffffffffff - x = 0Xffffffffffffffff - x = 0o77777777777777777 - x = 0O77777777777777777 - x = 123456789012345678901234567890 - x = 0b100000000000000000000000000000000000000000000000000000000000000000000 - x = 0B111111111111111111111111111111111111111111111111111111111111111111111 - - def testFloats(self): - x = 3.14 - x = 314. - x = 0.314 - # XXX x = 000.314 - x = .314 - x = 3e14 - x = 3E14 - x = 3e-14 - x = 3e+14 - x = 3.e14 - x = .3e14 - x = 3.1e4 - - def testStringLiterals(self): - x = ''; y = ""; self.assert_(len(x) == 0 and x == y) - x = '\''; y = "'"; self.assert_(len(x) == 1 and x == y and ord(x) == 39) - x = '"'; y = "\""; self.assert_(len(x) == 1 and x == y and ord(x) == 34) - x = "doesn't \"shrink\" does it" - y = 'doesn\'t "shrink" does it' - self.assert_(len(x) == 24 and x == y) - x = "does \"shrink\" doesn't it" - y = 'does "shrink" doesn\'t it' - self.assert_(len(x) == 24 and x == y) - x = """ -The "quick" -brown fox -jumps over -the 'lazy' dog. -""" - y = '\nThe "quick"\nbrown fox\njumps over\nthe \'lazy\' dog.\n' - self.assertEquals(x, y) - y = ''' -The "quick" -brown fox -jumps over -the 'lazy' dog. -''' - self.assertEquals(x, y) - y = "\n\ -The \"quick\"\n\ -brown fox\n\ -jumps over\n\ -the 'lazy' dog.\n\ -" - self.assertEquals(x, y) - y = '\n\ -The \"quick\"\n\ -brown fox\n\ -jumps over\n\ -the \'lazy\' dog.\n\ -' - self.assertEquals(x, y) - - def testEllipsis(self): - x = ... - self.assert_(x is Ellipsis) - self.assertRaises(SyntaxError, eval, ".. .") - -class GrammarTests(unittest.TestCase): - - # single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE - # XXX can't test in a script -- this rule is only used when interactive - - # file_input: (NEWLINE | stmt)* ENDMARKER - # Being tested as this very moment this very module - - # expr_input: testlist NEWLINE - # XXX Hard to test -- used only in calls to input() - - def testEvalInput(self): - # testlist ENDMARKER - x = eval('1, 0 or 1') - - def testFuncdef(self): - ### [decorators] 'def' NAME parameters ['->' test] ':' suite - ### decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE - ### decorators: decorator+ - ### parameters: '(' [typedargslist] ')' - ### typedargslist: ((tfpdef ['=' test] ',')* - ### ('*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] | '**' tfpdef) - ### | tfpdef ['=' test] (',' tfpdef ['=' test])* [',']) - ### tfpdef: NAME [':' test] - ### varargslist: ((vfpdef ['=' test] ',')* - ### ('*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] | '**' vfpdef) - ### | vfpdef ['=' test] (',' vfpdef ['=' test])* [',']) - ### vfpdef: NAME - def f1(): pass - f1() - f1(*()) - f1(*(), **{}) - def f2(one_argument): pass - def f3(two, arguments): pass - self.assertEquals(f2.__code__.co_varnames, ('one_argument',)) - self.assertEquals(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(**{'a':2}) - 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 - 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) - - # keyword arguments after *arglist - def f(*args, **kwargs): - return args, kwargs - self.assertEquals(f(1, x=2, *[3, 4], y=5), ((1, 3, 4), - {'x':2, 'y':5})) - self.assertRaises(SyntaxError, eval, "f(1, *(2,3), 4)") - self.assertRaises(SyntaxError, eval, "f(1, x=2, *(3,4), x=5)") - - # argument annotation tests - def f(x) -> list: pass - self.assertEquals(f.__annotations__, {'return': list}) - def f(x:int): pass - self.assertEquals(f.__annotations__, {'x': int}) - def f(*x:str): pass - self.assertEquals(f.__annotations__, {'x': str}) - def f(**x:float): pass - self.assertEquals(f.__annotations__, {'x': float}) - def f(x, y:1+2): pass - self.assertEquals(f.__annotations__, {'y': 3}) - def f(a, b:1, c:2, d): pass - self.assertEquals(f.__annotations__, {'b': 1, 'c': 2}) - def f(a, b:1, c:2, d, e:3=4, f=5, *g:6): pass - self.assertEquals(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.assertEquals(f.__annotations__, - {'b': 1, 'c': 2, 'e': 3, 'g': 6, 'h': 7, 'j': 9, - 'k': 11, 'return': 12}) - # Check for SF Bug #1697248 - mixing decorators and a return annotation - def null(x): return x - @null - def f(x) -> list: pass - self.assertEquals(f.__annotations__, {'return': list}) - - # test MAKE_CLOSURE with a variety of oparg's - closure = 1 - def f(): return closure - def f(x=1): return closure - def f(*, k=1): return closure - def f() -> int: return closure - - # Check ast errors in *args and *kwargs - check_syntax_error(self, "f(*g(1=2))") - check_syntax_error(self, "f(**g(1=2))") - - def testLambdef(self): - ### lambdef: 'lambda' [varargslist] ':' test - l1 = lambda : 0 - self.assertEquals(l1(), 0) - l2 = lambda : a[d] # XXX just testing the expression - l3 = lambda : [2 < x for x in [-1, 3, 0]] - self.assertEquals(l3(), [0, 1, 0]) - l4 = lambda x = lambda y = lambda z=1 : z : y() : x() - self.assertEquals(l4(), 1) - l5 = lambda x, y, z=2: x + y + z - self.assertEquals(l5(1, 2), 5) - self.assertEquals(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.assertEquals(l6(1,2), 1+2+20) - self.assertEquals(l6(1,2,k=10), 1+2+10) - - - ### stmt: simple_stmt | compound_stmt - # Tested below - - def testSimpleStmt(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 testExprStmt(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") - - def testDelStmt(self): - # 'del' exprlist - abc = [1,2,3] - x, y, z = abc - xyz = x, y, z - - del abc - del x, y, (z, xyz) - - def testPassStmt(self): - # 'pass' - pass - - # flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt - # Tested below - - def testBreakStmt(self): - # 'break' - while 1: break - - def testContinueStmt(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 testReturn(self): - # 'return' [testlist] - def g1(): return - def g2(): return 1 - g1() - x = g2() - check_syntax_error(self, "class foo:return 1") - - def testYield(self): - check_syntax_error(self, "class foo:yield 1") - - def testRaise(self): - # 'raise' test [',' test] - try: raise RuntimeError('just testing') - except RuntimeError: pass - try: raise KeyboardInterrupt - except KeyboardInterrupt: pass - - def testImport(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 testGlobal(self): - # 'global' NAME (',' NAME)* - global a - global a, b - global one, two, three, four, five, six, seven, eight, nine, ten - - def testNonlocal(self): - # 'nonlocal' NAME (',' NAME)* - x = 0 - y = 0 - def f(): - nonlocal x - nonlocal x, y - - def testAssert(self): - # assert_stmt: 'assert' test [',' test] - assert 1 - assert 1, 1 - assert lambda x:x - assert 1, lambda x:x+1 - try: - assert 0, "msg" - except AssertionError as e: - self.assertEquals(e.args[0], "msg") - else: - if __debug__: - self.fail("AssertionError not raised by assert 0") - - ### compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef - # Tested below - - def testIf(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 testWhile(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.assertEquals(x, 2) - - def testFor(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 testTry(self): - ### try_stmt: 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] - ### | 'try' ':' suite 'finally' ':' suite - ### except_clause: 'except' [expr ['as' expr]] - try: - 1/0 - except ZeroDivisionError: - pass - else: - pass - try: 1/0 - except EOFError: pass - except TypeError as msg: pass - except RuntimeError as msg: pass - except: pass - else: pass - try: 1/0 - except (EOFError, TypeError, ZeroDivisionError): pass - try: 1/0 - except (EOFError, TypeError, ZeroDivisionError) as msg: pass - try: pass - finally: pass - - def testSuite(self): - # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT - if 1: pass - if 1: - pass - if 1: - # - # - # - pass - pass - # - pass - # - - def testTest(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 testComparison(self): - ### comparison: expr (comp_op expr)* - ### comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is'|'is' 'not' - if 1: pass - x = (1 == 1) - if 1 == 1: pass - if 1 != 1: pass - if 1 < 1: pass - if 1 > 1: pass - if 1 <= 1: pass - if 1 >= 1: pass - if 1 is 1: pass - if 1 is not 1: pass - if 1 in (): pass - if 1 not in (): pass - if 1 < 1 > 1 == 1 >= 1 <= 1 != 1 in 1 not in 1 is 1 is not 1: pass - - def testBinaryMaskOps(self): - x = 1 & 1 - x = 1 ^ 1 - x = 1 | 1 - - def testShiftOps(self): - x = 1 << 1 - x = 1 >> 1 - x = 1 << 1 >> 1 - - def testAdditiveOps(self): - x = 1 - x = 1 + 1 - x = 1 - 1 - 1 - x = 1 - 1 + 1 - 1 + 1 - - def testMultiplicativeOps(self): - x = 1 * 1 - x = 1 / 1 - x = 1 % 1 - x = 1 / 1 * 1 % 1 - - def testUnaryOps(self): - x = +1 - x = -1 - x = ~1 - x = ~1 ^ 1 & 1 | 1 & 1 ^ -1 - x = -1*1/1 + 1*1 - ---1*1 - - def testSelectors(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: x if isinstance(x, tuple) else ()) - self.assertEquals(str(L), '[1, (1,), (1, 2), (1, 2, 3)]') - - def testAtoms(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 testClassdef(self): - # 'class' NAME ['(' [testlist] ')'] ':' suite - class B: pass - class B2(): pass - class C1(B): pass - class C2(B): pass - class D(C1, C2, B): pass - class C: - def meth1(self): pass - def meth2(self, arg): pass - def meth3(self, a1, a2): pass - - # decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE - # decorators: decorator+ - # decorated: decorators (classdef | funcdef) - def class_decorator(x): return x - @class_decorator - class G: pass - - def testDictcomps(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 testListcomps(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 testGenexps(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 testComprehensionSpecials(self): - # test for outmost iterable precomputation - x = 10; g = (i for i in range(x)); x = 5 - self.assertEqual(len(list(g)), 10) - - # This should hold, since we're only precomputing outmost iterable. - x = 10; t = False; g = ((i,j) for i in range(x) if t for j in range(x)) - x = 5; t = True; - self.assertEqual([(i,j) for i in range(10) for j in range(5)], list(g)) - - # Grammar allows multiple adjacent 'if's in listcomps and genexps, - # even though it's silly. Make sure it works (ifelse broke this.) - self.assertEqual([ x for x in range(10) if x % 2 if x % 3 ], [1, 5, 7]) - self.assertEqual(list(x for x in range(10) if x % 2 if x % 3), [1, 5, 7]) - - # verify unpacking single element tuples in listcomp/genexp. - self.assertEqual([x for x, in [(4,), (5,), (6,)]], [4, 5, 6]) - self.assertEqual(list(x for x, in [(7,), (8,), (9,)]), [7, 8, 9]) - - def test_with_statement(self): - class manager(object): - def __enter__(self): - return (1, 2) - def __exit__(self, *args): - pass - - with manager(): - pass - with manager() as x: - pass - with manager() as (x, y): - pass - with manager(), manager(): - pass - with manager() as x, manager() as y: - pass - with manager() as x, manager(): - pass - - def testIfElseExpr(self): - # Test ifelse expressions in various cases - def _checkeval(msg, ret): - "helper to check that evaluation of expressions is done correctly" - print(x) - 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_main(): - run_unittest(TokenTests, GrammarTests) - -if __name__ == '__main__': - test_main() |