| # Python test set -- part 1, grammar. |
| # This just tests whether the parser accepts them all. |
| |
| from test.support import run_unittest, check_syntax_error |
| import unittest |
| import sys |
| # testing import * |
| from sys import * |
| |
| |
| class TokenTests(unittest.TestCase): |
| |
| def test_backslash(self): |
| # Backslash means line continuation: |
| x = 1 \ |
| + 1 |
| self.assertEqual(x, 2, 'backslash for line continuation') |
| |
| # Backslash does not means continuation in comments :\ |
| x = 0 |
| self.assertEqual(x, 0, 'backslash ending comment') |
| |
| def test_plain_integers(self): |
| self.assertEqual(type(000), type(0)) |
| self.assertEqual(0xff, 255) |
| self.assertEqual(0o377, 255) |
| self.assertEqual(2147483647, 0o17777777777) |
| self.assertEqual(0b1001, 9) |
| # "0x" is not a valid literal |
| self.assertRaises(SyntaxError, eval, "0x") |
| from sys import maxsize |
| if maxsize == 2147483647: |
| self.assertEqual(-2147483647-1, -0o20000000000) |
| # XXX -2147483648 |
| self.assertTrue(0o37777777777 > 0) |
| self.assertTrue(0xffffffff > 0) |
| self.assertTrue(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.assertEqual(-9223372036854775807-1, -0o1000000000000000000000) |
| self.assertTrue(0o1777777777777777777777 > 0) |
| self.assertTrue(0xffffffffffffffff > 0) |
| self.assertTrue(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 test_long_integers(self): |
| x = 0 |
| x = 0xffffffffffffffff |
| x = 0Xffffffffffffffff |
| x = 0o77777777777777777 |
| x = 0O77777777777777777 |
| x = 123456789012345678901234567890 |
| x = 0b100000000000000000000000000000000000000000000000000000000000000000000 |
| x = 0B111111111111111111111111111111111111111111111111111111111111111111111 |
| |
| def test_floats(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 test_string_literals(self): |
| x = ''; y = ""; self.assertTrue(len(x) == 0 and x == y) |
| x = '\''; y = "'"; self.assertTrue(len(x) == 1 and x == y and ord(x) == 39) |
| x = '"'; y = "\""; self.assertTrue(len(x) == 1 and x == y and ord(x) == 34) |
| x = "doesn't \"shrink\" does it" |
| y = 'doesn\'t "shrink" does it' |
| self.assertTrue(len(x) == 24 and x == y) |
| x = "does \"shrink\" doesn't it" |
| y = 'does "shrink" doesn\'t it' |
| self.assertTrue(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.assertEqual(x, y) |
| y = ''' |
| The "quick" |
| brown fox |
| jumps over |
| the 'lazy' dog. |
| ''' |
| self.assertEqual(x, y) |
| y = "\n\ |
| The \"quick\"\n\ |
| brown fox\n\ |
| jumps over\n\ |
| the 'lazy' dog.\n\ |
| " |
| self.assertEqual(x, y) |
| y = '\n\ |
| The \"quick\"\n\ |
| brown fox\n\ |
| jumps over\n\ |
| the \'lazy\' dog.\n\ |
| ' |
| self.assertEqual(x, y) |
| |
| def test_ellipsis(self): |
| x = ... |
| self.assertTrue(x is Ellipsis) |
| self.assertRaises(SyntaxError, eval, ".. .") |
| |
| def test_eof_error(self): |
| samples = ("def foo(", "\ndef foo(", "def foo(\n") |
| for s in samples: |
| with self.assertRaises(SyntaxError) as cm: |
| compile(s, "<test>", "exec") |
| self.assertIn("unexpected EOF", str(cm.exception)) |
| |
| 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 test_eval_input(self): |
| # testlist ENDMARKER |
| x = eval('1, 0 or 1') |
| |
| def test_funcdef(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.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(**{'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.assertEqual(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.assertEqual(f.__annotations__, {'return': list}) |
| def f(x:int): pass |
| self.assertEqual(f.__annotations__, {'x': int}) |
| def f(*x:str): pass |
| self.assertEqual(f.__annotations__, {'x': str}) |
| def f(**x:float): pass |
| self.assertEqual(f.__annotations__, {'x': float}) |
| def f(x, y:1+2): pass |
| self.assertEqual(f.__annotations__, {'y': 3}) |
| def f(a, b:1, c:2, d): pass |
| self.assertEqual(f.__annotations__, {'b': 1, 'c': 2}) |
| def f(a, b:1, c:2, d, e:3=4, f=5, *g:6): pass |
| self.assertEqual(f.__annotations__, |
| {'b': 1, 'c': 2, 'e': 3, 'g': 6}) |
| def f(a, b:1, c:2, d, e:3=4, f=5, *g:6, h:7, i=8, j:9=10, |
| **k:11) -> 12: pass |
| self.assertEqual(f.__annotations__, |
| {'b': 1, 'c': 2, 'e': 3, 'g': 6, 'h': 7, 'j': 9, |
| 'k': 11, 'return': 12}) |
| # Check for 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 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 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) |
| |
| |
| ### 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") |
| |
| def test_del_stmt(self): |
| # 'del' exprlist |
| abc = [1,2,3] |
| x, y, z = abc |
| xyz = x, y, z |
| |
| del abc |
| del x, y, (z, xyz) |
| |
| def test_pass_stmt(self): |
| # 'pass' |
| pass |
| |
| # flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt |
| # Tested below |
| |
| def test_break_stmt(self): |
| # 'break' |
| while 1: break |
| |
| def test_continue_stmt(self): |
| # 'continue' |
| i = 1 |
| while i: i = 0; continue |
| |
| msg = "" |
| while not msg: |
| msg = "ok" |
| try: |
| continue |
| msg = "continue failed to continue inside try" |
| except: |
| msg = "continue inside try called except block" |
| if msg != "ok": |
| self.fail(msg) |
| |
| msg = "" |
| while not msg: |
| msg = "finally block not called" |
| try: |
| continue |
| finally: |
| msg = "ok" |
| if msg != "ok": |
| self.fail(msg) |
| |
| def test_break_continue_loop(self): |
| # This test warrants an explanation. It is a test specifically for SF bugs |
| # #463359 and #462937. The bug is that a 'break' statement executed or |
| # exception raised inside a try/except inside a loop, *after* a continue |
| # statement has been executed in that loop, will cause the wrong number of |
| # arguments to be popped off the stack and the instruction pointer reset to |
| # a very small number (usually 0.) Because of this, the following test |
| # *must* written as a function, and the tracking vars *must* be function |
| # arguments with default values. Otherwise, the test will loop and loop. |
| |
| def test_inner(extra_burning_oil = 1, count=0): |
| big_hippo = 2 |
| while big_hippo: |
| count += 1 |
| try: |
| if extra_burning_oil and big_hippo == 1: |
| extra_burning_oil -= 1 |
| break |
| big_hippo -= 1 |
| continue |
| except: |
| raise |
| if count > 2 or big_hippo != 1: |
| self.fail("continue then break in try/except in loop broken!") |
| test_inner() |
| |
| def test_return(self): |
| # 'return' [testlist] |
| def g1(): return |
| def g2(): return 1 |
| g1() |
| x = g2() |
| check_syntax_error(self, "class foo:return 1") |
| |
| def test_yield(self): |
| check_syntax_error(self, "class foo:yield 1") |
| |
| 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 0, "msg" |
| except AssertionError as e: |
| self.assertEqual(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 test_if(self): |
| # 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
| if 1: pass |
| if 1: pass |
| else: pass |
| if 0: pass |
| elif 0: pass |
| if 0: pass |
| elif 0: pass |
| elif 0: pass |
| elif 0: pass |
| else: pass |
| |
| def test_while(self): |
| # 'while' test ':' suite ['else' ':' suite] |
| while 0: pass |
| while 0: pass |
| else: pass |
| |
| # Issue1920: "while 0" is optimized away, |
| # ensure that the "else" clause is still present. |
| x = 0 |
| while 0: |
| x = 1 |
| else: |
| x = 2 |
| self.assertEqual(x, 2) |
| |
| def test_for(self): |
| # 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] |
| for i in 1, 2, 3: pass |
| for i, j, k in (): pass |
| else: pass |
| class Squares: |
| def __init__(self, max): |
| self.max = max |
| self.sofar = [] |
| def __len__(self): return len(self.sofar) |
| def __getitem__(self, i): |
| if not 0 <= i < self.max: raise IndexError |
| n = len(self.sofar) |
| while n <= i: |
| self.sofar.append(n*n) |
| n = n+1 |
| return self.sofar[i] |
| n = 0 |
| for x in Squares(10): n = n+x |
| if n != 285: |
| self.fail('for over growing sequence') |
| |
| result = [] |
| for x, in [(1,), (2,), (3,)]: |
| result.append(x) |
| self.assertEqual(result, [1, 2, 3]) |
| |
| def test_try(self): |
| ### try_stmt: 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| ### | 'try' ':' suite 'finally' ':' suite |
| ### except_clause: 'except' [expr ['as' expr]] |
| try: |
| 1/0 |
| except ZeroDivisionError: |
| pass |
| else: |
| pass |
| try: 1/0 |
| except EOFError: pass |
| except TypeError as msg: pass |
| except 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 test_suite(self): |
| # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT |
| if 1: pass |
| if 1: |
| pass |
| if 1: |
| # |
| # |
| # |
| pass |
| pass |
| # |
| pass |
| # |
| |
| def test_test(self): |
| ### and_test ('or' and_test)* |
| ### and_test: not_test ('and' not_test)* |
| ### not_test: 'not' not_test | comparison |
| if not 1: pass |
| if 1 and 1: pass |
| if 1 or 1: pass |
| if not not not 1: pass |
| if not 1 and 1 and 1: pass |
| if 1 and 1 or 1 and 1 and 1 or not 1 and 1: pass |
| |
| def test_comparison(self): |
| ### comparison: expr (comp_op expr)* |
| ### comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is'|'is' 'not' |
| if 1: pass |
| x = (1 == 1) |
| if 1 == 1: pass |
| if 1 != 1: pass |
| if 1 < 1: pass |
| if 1 > 1: pass |
| if 1 <= 1: pass |
| if 1 >= 1: pass |
| if 1 is 1: pass |
| if 1 is not 1: pass |
| if 1 in (): pass |
| if 1 not in (): pass |
| if 1 < 1 > 1 == 1 >= 1 <= 1 != 1 in 1 not in 1 is 1 is not 1: pass |
| |
| def test_binary_mask_ops(self): |
| x = 1 & 1 |
| x = 1 ^ 1 |
| x = 1 | 1 |
| |
| def test_shift_ops(self): |
| x = 1 << 1 |
| x = 1 >> 1 |
| x = 1 << 1 >> 1 |
| |
| def test_additive_ops(self): |
| x = 1 |
| x = 1 + 1 |
| x = 1 - 1 - 1 |
| x = 1 - 1 + 1 - 1 + 1 |
| |
| def test_multiplicative_ops(self): |
| x = 1 * 1 |
| x = 1 / 1 |
| x = 1 % 1 |
| x = 1 / 1 * 1 % 1 |
| |
| def test_unary_ops(self): |
| x = +1 |
| x = -1 |
| x = ~1 |
| x = ~1 ^ 1 & 1 | 1 & 1 ^ -1 |
| x = -1*1/1 + 1*1 - ---1*1 |
| |
| def test_selectors(self): |
| ### trailer: '(' [testlist] ')' | '[' subscript ']' | '.' NAME |
| ### subscript: expr | [expr] ':' [expr] |
| |
| import sys, time |
| c = sys.path[0] |
| x = time.time() |
| x = sys.modules['time'].time() |
| a = '01234' |
| c = a[0] |
| c = a[-1] |
| s = a[0:5] |
| s = a[:5] |
| s = a[0:] |
| s = a[:] |
| s = a[-5:] |
| s = a[:-1] |
| s = a[-4:-3] |
| # A rough test of SF bug 1333982. http://python.org/sf/1333982 |
| # The testing here is fairly incomplete. |
| # Test cases should include: commas with 1 and 2 colons |
| d = {} |
| d[1] = 1 |
| d[1,] = 2 |
| d[1,2] = 3 |
| d[1,2,3] = 4 |
| L = list(d) |
| L.sort(key=lambda x: x if isinstance(x, tuple) else ()) |
| self.assertEqual(str(L), '[1, (1,), (1, 2), (1, 2, 3)]') |
| |
| def test_atoms(self): |
| ### atom: '(' [testlist] ')' | '[' [testlist] ']' | '{' [dictsetmaker] '}' | NAME | NUMBER | STRING |
| ### dictsetmaker: (test ':' test (',' test ':' test)* [',']) | (test (',' test)* [',']) |
| |
| x = (1) |
| x = (1 or 2 or 3) |
| x = (1 or 2 or 3, 2, 3) |
| |
| x = [] |
| x = [1] |
| x = [1 or 2 or 3] |
| x = [1 or 2 or 3, 2, 3] |
| x = [] |
| |
| x = {} |
| x = {'one': 1} |
| x = {'one': 1,} |
| x = {'one' or 'two': 1 or 2} |
| x = {'one': 1, 'two': 2} |
| x = {'one': 1, 'two': 2,} |
| x = {'one': 1, 'two': 2, 'three': 3, 'four': 4, 'five': 5, 'six': 6} |
| |
| x = {'one'} |
| x = {'one', 1,} |
| x = {'one', 'two', 'three'} |
| x = {2, 3, 4,} |
| |
| x = x |
| x = 'x' |
| x = 123 |
| |
| ### exprlist: expr (',' expr)* [','] |
| ### testlist: test (',' test)* [','] |
| # These have been exercised enough above |
| |
| def test_classdef(self): |
| # 'class' NAME ['(' [testlist] ')'] ':' suite |
| class B: pass |
| class B2(): pass |
| class C1(B): pass |
| class C2(B): pass |
| class D(C1, C2, B): pass |
| class C: |
| def meth1(self): pass |
| def meth2(self, arg): pass |
| def meth3(self, a1, a2): pass |
| |
| # decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE |
| # decorators: decorator+ |
| # decorated: decorators (classdef | funcdef) |
| def class_decorator(x): return x |
| @class_decorator |
| class G: pass |
| |
| def test_dictcomps(self): |
| # dictorsetmaker: ( (test ':' test (comp_for | |
| # (',' test ':' test)* [','])) | |
| # (test (comp_for | (',' test)* [','])) ) |
| nums = [1, 2, 3] |
| self.assertEqual({i:i+1 for i in nums}, {1: 2, 2: 3, 3: 4}) |
| |
| def test_listcomps(self): |
| # list comprehension tests |
| nums = [1, 2, 3, 4, 5] |
| strs = ["Apple", "Banana", "Coconut"] |
| spcs = [" Apple", " Banana ", "Coco nut "] |
| |
| self.assertEqual([s.strip() for s in spcs], ['Apple', 'Banana', 'Coco nut']) |
| self.assertEqual([3 * x for x in nums], [3, 6, 9, 12, 15]) |
| self.assertEqual([x for x in nums if x > 2], [3, 4, 5]) |
| self.assertEqual([(i, s) for i in nums for s in strs], |
| [(1, 'Apple'), (1, 'Banana'), (1, 'Coconut'), |
| (2, 'Apple'), (2, 'Banana'), (2, 'Coconut'), |
| (3, 'Apple'), (3, 'Banana'), (3, 'Coconut'), |
| (4, 'Apple'), (4, 'Banana'), (4, 'Coconut'), |
| (5, 'Apple'), (5, 'Banana'), (5, 'Coconut')]) |
| self.assertEqual([(i, s) for i in nums for s in [f for f in strs if "n" in f]], |
| [(1, 'Banana'), (1, 'Coconut'), (2, 'Banana'), (2, 'Coconut'), |
| (3, 'Banana'), (3, 'Coconut'), (4, 'Banana'), (4, 'Coconut'), |
| (5, 'Banana'), (5, 'Coconut')]) |
| self.assertEqual([(lambda a:[a**i for i in range(a+1)])(j) for j in range(5)], |
| [[1], [1, 1], [1, 2, 4], [1, 3, 9, 27], [1, 4, 16, 64, 256]]) |
| |
| def test_in_func(l): |
| return [0 < x < 3 for x in l if x > 2] |
| |
| self.assertEqual(test_in_func(nums), [False, False, False]) |
| |
| def test_nested_front(): |
| self.assertEqual([[y for y in [x, x + 1]] for x in [1,3,5]], |
| [[1, 2], [3, 4], [5, 6]]) |
| |
| test_nested_front() |
| |
| check_syntax_error(self, "[i, s for i in nums for s in strs]") |
| check_syntax_error(self, "[x if y]") |
| |
| suppliers = [ |
| (1, "Boeing"), |
| (2, "Ford"), |
| (3, "Macdonalds") |
| ] |
| |
| parts = [ |
| (10, "Airliner"), |
| (20, "Engine"), |
| (30, "Cheeseburger") |
| ] |
| |
| suppart = [ |
| (1, 10), (1, 20), (2, 20), (3, 30) |
| ] |
| |
| x = [ |
| (sname, pname) |
| for (sno, sname) in suppliers |
| for (pno, pname) in parts |
| for (sp_sno, sp_pno) in suppart |
| if sno == sp_sno and pno == sp_pno |
| ] |
| |
| self.assertEqual(x, [('Boeing', 'Airliner'), ('Boeing', 'Engine'), ('Ford', 'Engine'), |
| ('Macdonalds', 'Cheeseburger')]) |
| |
| def test_genexps(self): |
| # generator expression tests |
| g = ([x for x in range(10)] for x in range(1)) |
| self.assertEqual(next(g), [x for x in range(10)]) |
| try: |
| next(g) |
| self.fail('should produce StopIteration exception') |
| except StopIteration: |
| pass |
| |
| a = 1 |
| try: |
| g = (a for d in a) |
| next(g) |
| self.fail('should produce TypeError') |
| except TypeError: |
| pass |
| |
| self.assertEqual(list((x, y) for x in 'abcd' for y in 'abcd'), [(x, y) for x in 'abcd' for y in 'abcd']) |
| self.assertEqual(list((x, y) for x in 'ab' for y in 'xy'), [(x, y) for x in 'ab' for y in 'xy']) |
| |
| a = [x for x in range(10)] |
| b = (x for x in (y for y in a)) |
| self.assertEqual(sum(b), sum([x for x in range(10)])) |
| |
| self.assertEqual(sum(x**2 for x in range(10)), sum([x**2 for x in range(10)])) |
| self.assertEqual(sum(x*x for x in range(10) if x%2), sum([x*x for x in range(10) if x%2])) |
| self.assertEqual(sum(x for x in (y for y in range(10))), sum([x for x in range(10)])) |
| self.assertEqual(sum(x for x in (y for y in (z for z in range(10)))), sum([x for x in range(10)])) |
| self.assertEqual(sum(x for x in [y for y in (z for z in range(10))]), sum([x for x in range(10)])) |
| self.assertEqual(sum(x for x in (y for y in (z for z in range(10) if True)) if True), sum([x for x in range(10)])) |
| self.assertEqual(sum(x for x in (y for y in (z for z in range(10) if True) if False) if True), 0) |
| check_syntax_error(self, "foo(x for x in range(10), 100)") |
| check_syntax_error(self, "foo(100, x for x in range(10))") |
| |
| def test_comprehension_specials(self): |
| # test for outmost iterable precomputation |
| x = 10; g = (i for i in range(x)); x = 5 |
| self.assertEqual(len(list(g)), 10) |
| |
| # This should hold, since we're only precomputing outmost iterable. |
| x = 10; t = False; g = ((i,j) for i in range(x) if t for j in range(x)) |
| x = 5; t = True; |
| self.assertEqual([(i,j) for i in range(10) for j in range(5)], list(g)) |
| |
| # Grammar allows multiple adjacent 'if's in listcomps and genexps, |
| # even though it's silly. Make sure it works (ifelse broke this.) |
| self.assertEqual([ x for x in range(10) if x % 2 if x % 3 ], [1, 5, 7]) |
| self.assertEqual(list(x for x in range(10) if x % 2 if x % 3), [1, 5, 7]) |
| |
| # verify unpacking single element tuples in listcomp/genexp. |
| self.assertEqual([x for x, in [(4,), (5,), (6,)]], [4, 5, 6]) |
| self.assertEqual(list(x for x, in [(7,), (8,), (9,)]), [7, 8, 9]) |
| |
| def test_with_statement(self): |
| class manager(object): |
| def __enter__(self): |
| return (1, 2) |
| def __exit__(self, *args): |
| pass |
| |
| with manager(): |
| pass |
| with manager() as x: |
| pass |
| with manager() as (x, y): |
| pass |
| with manager(), manager(): |
| pass |
| with manager() as x, manager() as y: |
| pass |
| with manager() as x, manager(): |
| pass |
| |
| def test_if_else_expr(self): |
| # Test ifelse expressions in various cases |
| def _checkeval(msg, ret): |
| "helper to check that evaluation of expressions is done correctly" |
| print(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_paren_evaluation(self): |
| self.assertEqual(16 // (4 // 2), 8) |
| self.assertEqual((16 // 4) // 2, 2) |
| self.assertEqual(16 // 4 // 2, 2) |
| self.assertTrue(False is (2 is 3)) |
| self.assertFalse((False is 2) is 3) |
| self.assertFalse(False is 2 is 3) |
| |
| |
| def test_main(): |
| run_unittest(TokenTests, GrammarTests) |
| |
| if __name__ == '__main__': |
| test_main() |