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//usr/lib/python2.4/test/test_grammar.py
# 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.test_support import TestFailed, verify, check_syntax import sys print '1. Parser' print '1.1 Tokens' print '1.1.1 Backslashes' # Backslash means line continuation: x = 1 \ + 1 if x != 2: raise TestFailed, 'backslash for line continuation' # Backslash does not means continuation in comments :\ x = 0 if x != 0: raise TestFailed, 'backslash ending comment' print '1.1.2 Numeric literals' print '1.1.2.1 Plain integers' if 0xff != 255: raise TestFailed, 'hex int' if 0377 != 255: raise TestFailed, 'octal int' if 2147483647 != 017777777777: raise TestFailed, 'large positive int' try: from sys import maxint except ImportError: maxint = 2147483647 if maxint == 2147483647: # The following test will start to fail in Python 2.4; # change the 020000000000 to -020000000000 if -2147483647-1 != -020000000000: raise TestFailed, 'max negative int' # XXX -2147483648 if 037777777777 < 0: raise TestFailed, 'large oct' if 0xffffffff < 0: raise TestFailed, 'large hex' for s in '2147483648', '040000000000', '0x100000000': try: x = eval(s) except OverflowError: print "OverflowError on huge integer literal " + repr(s) elif eval('maxint == 9223372036854775807'): if eval('-9223372036854775807-1 != -01000000000000000000000'): raise TestFailed, 'max negative int' if eval('01777777777777777777777') < 0: raise TestFailed, 'large oct' if eval('0xffffffffffffffff') < 0: raise TestFailed, 'large hex' for s in '9223372036854775808', '02000000000000000000000', \ '0x10000000000000000': try: x = eval(s) except OverflowError: print "OverflowError on huge integer literal " + repr(s) else: print 'Weird maxint value', maxint print '1.1.2.2 Long integers' x = 0L x = 0l x = 0xffffffffffffffffL x = 0xffffffffffffffffl x = 077777777777777777L x = 077777777777777777l x = 123456789012345678901234567890L x = 123456789012345678901234567890l print '1.1.2.3 Floating point' 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 print '1.1.3 String literals' x = ''; y = ""; verify(len(x) == 0 and x == y) x = '\''; y = "'"; verify(len(x) == 1 and x == y and ord(x) == 39) x = '"'; y = "\""; verify(len(x) == 1 and x == y and ord(x) == 34) x = "doesn't \"shrink\" does it" y = 'doesn\'t "shrink" does it' verify(len(x) == 24 and x == y) x = "does \"shrink\" doesn't it" y = 'does "shrink" doesn\'t it' verify(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' verify(x == y) y = ''' The "quick" brown fox jumps over the 'lazy' dog. '''; verify(x == y) y = "\n\ The \"quick\"\n\ brown fox\n\ jumps over\n\ the 'lazy' dog.\n\ "; verify(x == y) y = '\n\ The \"quick\"\n\ brown fox\n\ jumps over\n\ the \'lazy\' dog.\n\ '; verify(x == y) print '1.2 Grammar' print 'single_input' # NEWLINE | simple_stmt | compound_stmt NEWLINE # XXX can't test in a script -- this rule is only used when interactive print 'file_input' # (NEWLINE | stmt)* ENDMARKER # Being tested as this very moment this very module print 'expr_input' # testlist NEWLINE # XXX Hard to test -- used only in calls to input() print 'eval_input' # testlist ENDMARKER x = eval('1, 0 or 1') print 'funcdef' ### 'def' NAME parameters ':' suite ### parameters: '(' [varargslist] ')' ### varargslist: (fpdef ['=' test] ',')* ('*' NAME [',' ('**'|'*' '*') NAME] ### | ('**'|'*' '*') NAME) ### | fpdef ['=' test] (',' fpdef ['=' test])* [','] ### fpdef: NAME | '(' fplist ')' ### fplist: fpdef (',' fpdef)* [','] ### arglist: (argument ',')* (argument | *' test [',' '**' test] | '**' test) ### argument: [test '='] test # Really [keyword '='] test def f1(): pass f1() f1(*()) f1(*(), **{}) def f2(one_argument): pass def f3(two, arguments): pass def f4(two, (compound, (argument, list))): pass def f5((compound, first), two): pass verify(f2.func_code.co_varnames == ('one_argument',)) verify(f3.func_code.co_varnames == ('two', 'arguments')) if sys.platform.startswith('java'): verify(f4.func_code.co_varnames == ('two', '(compound, (argument, list))', 'compound', 'argument', 'list',)) verify(f5.func_code.co_varnames == ('(compound, first)', 'two', 'compound', 'first')) else: verify(f4.func_code.co_varnames == ('two', '.2', 'compound', 'argument', 'list')) verify(f5.func_code.co_varnames == ('.0', 'two', 'compound', 'first')) 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 def v3(a, (b, c), *rest): return a, b, c, rest if sys.platform.startswith('java'): verify(v3.func_code.co_varnames == ('a', '(b, c)', 'rest', 'b', 'c')) else: verify(v3.func_code.co_varnames == ('a', '.2', 'rest', 'b', 'c')) verify(v3(1, (2, 3), 4) == (1, 2, 3, (4,))) 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}) ### lambdef: 'lambda' [varargslist] ':' test print 'lambdef' l1 = lambda : 0 verify(l1() == 0) l2 = lambda : a[d] # XXX just testing the expression l3 = lambda : [2 < x for x in [-1, 3, 0L]] verify(l3() == [0, 1, 0]) l4 = lambda x = lambda y = lambda z=1 : z : y() : x() verify(l4() == 1) l5 = lambda x, y, z=2: x + y + z verify(l5(1, 2) == 5) verify(l5(1, 2, 3) == 6) check_syntax("lambda x: x = 2") ### stmt: simple_stmt | compound_stmt # Tested below ### simple_stmt: small_stmt (';' small_stmt)* [';'] print 'simple_stmt' x = 1; pass; del x ### small_stmt: expr_stmt | print_stmt | pass_stmt | del_stmt | flow_stmt | import_stmt | global_stmt | access_stmt | exec_stmt # Tested below print 'expr_stmt' # (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) # NB these variables are deleted below check_syntax("x + 1 = 1") check_syntax("a + 1 = b + 2") print 'print_stmt' # 'print' (test ',')* [test] print 1, 2, 3 print 1, 2, 3, print print 0 or 1, 0 or 1, print 0 or 1 print 'extended print_stmt' # 'print' '>>' test ',' import sys print >> sys.stdout, 1, 2, 3 print >> sys.stdout, 1, 2, 3, print >> sys.stdout print >> sys.stdout, 0 or 1, 0 or 1, print >> sys.stdout, 0 or 1 # test printing to an instance class Gulp: def write(self, msg): pass gulp = Gulp() print >> gulp, 1, 2, 3 print >> gulp, 1, 2, 3, print >> gulp print >> gulp, 0 or 1, 0 or 1, print >> gulp, 0 or 1 # test print >> None def driver(): oldstdout = sys.stdout sys.stdout = Gulp() try: tellme(Gulp()) tellme() finally: sys.stdout = oldstdout # we should see this once def tellme(file=sys.stdout): print >> file, 'hello world' driver() # we should not see this at all def tellme(file=None): print >> file, 'goodbye universe' driver() # syntax errors check_syntax('print ,') check_syntax('print >> x,') print 'del_stmt' # 'del' exprlist del abc del x, y, (z, xyz) print 'pass_stmt' # 'pass' pass print 'flow_stmt' # break_stmt | continue_stmt | return_stmt | raise_stmt # Tested below print 'break_stmt' # 'break' while 1: break print 'continue_stmt' # 'continue' i = 1 while i: i = 0; continue msg = "" while not msg: msg = "continue + try/except ok" try: continue msg = "continue failed to continue inside try" except: msg = "continue inside try called except block" print msg msg = "" while not msg: msg = "finally block not called" try: continue finally: msg = "continue + try/finally ok" print msg # 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. print "testing continue and break in try/except in loop" def test_break_continue_loop(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: print "continue then break in try/except in loop broken!" test_break_continue_loop() print 'return_stmt' # 'return' [testlist] def g1(): return def g2(): return 1 g1() x = g2() print 'raise_stmt' # 'raise' test [',' test] try: raise RuntimeError, 'just testing' except RuntimeError: pass try: raise KeyboardInterrupt except KeyboardInterrupt: pass print 'import_name' # 'import' dotted_as_names import sys import time, sys print 'import_from' # 'from' dotted_name 'import' ('*' | '(' import_as_names ')' | import_as_names) from time import time from time import (time) from sys import * from sys import path, argv from sys import (path, argv) from sys import (path, argv,) print 'global_stmt' # 'global' NAME (',' NAME)* def f(): global a global a, b global one, two, three, four, five, six, seven, eight, nine, ten print 'exec_stmt' # 'exec' expr ['in' expr [',' expr]] def f(): z = None del z exec 'z=1+1\n' if z != 2: raise TestFailed, 'exec \'z=1+1\'\\n' del z exec 'z=1+1' if z != 2: raise TestFailed, 'exec \'z=1+1\'' z = None del z import types if hasattr(types, "UnicodeType"): exec r"""if 1: exec u'z=1+1\n' if z != 2: raise TestFailed, 'exec u\'z=1+1\'\\n' del z exec u'z=1+1' if z != 2: raise TestFailed, 'exec u\'z=1+1\'' """ f() g = {} exec 'z = 1' in g if g.has_key('__builtins__'): del g['__builtins__'] if g != {'z': 1}: raise TestFailed, 'exec \'z = 1\' in g' g = {} l = {} import warnings warnings.filterwarnings("ignore", "global statement", module="<string>") exec 'global a; a = 1; b = 2' in g, l if g.has_key('__builtins__'): del g['__builtins__'] if l.has_key('__builtins__'): del l['__builtins__'] if (g, l) != ({'a':1}, {'b':2}): raise TestFailed, 'exec ... in g (%s), l (%s)' %(g,l) print "assert_stmt" # assert_stmt: 'assert' test [',' test] assert 1 assert 1, 1 assert lambda x:x assert 1, lambda x:x+1 ### compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef # Tested below print 'if_stmt' # '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 print 'while_stmt' # 'while' test ':' suite ['else' ':' suite] while 0: pass while 0: pass else: pass print 'for_stmt' # '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: raise TestFailed, 'for over growing sequence' print 'try_stmt' ### try_stmt: 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] ### | 'try' ':' suite 'finally' ':' suite ### except_clause: 'except' [expr [',' expr]] try: 1/0 except ZeroDivisionError: pass else: pass try: 1/0 except EOFError: pass except TypeError, msg: pass except RuntimeError, msg: pass except: pass else: pass try: 1/0 except (EOFError, TypeError, ZeroDivisionError): pass try: 1/0 except (EOFError, TypeError, ZeroDivisionError), msg: pass try: pass finally: pass print 'suite' # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT if 1: pass if 1: pass if 1: # # # pass pass # pass # print 'test' ### 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 print 'comparison' ### 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 >= 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 != 1 in 1 not in 1 is 1 is not 1: pass print 'binary mask ops' x = 1 & 1 x = 1 ^ 1 x = 1 | 1 print 'shift ops' x = 1 << 1 x = 1 >> 1 x = 1 << 1 >> 1 print 'additive ops' x = 1 x = 1 + 1 x = 1 - 1 - 1 x = 1 - 1 + 1 - 1 + 1 print 'multiplicative ops' x = 1 * 1 x = 1 / 1 x = 1 % 1 x = 1 / 1 * 1 % 1 print 'unary ops' x = +1 x = -1 x = ~1 x = ~1 ^ 1 & 1 | 1 & 1 ^ -1 x = -1*1/1 + 1*1 - ---1*1 print 'selectors' ### trailer: '(' [testlist] ')' | '[' subscript ']' | '.' NAME ### subscript: expr | [expr] ':' [expr] f1() f2(1) f2(1,) f3(1, 2) f3(1, 2,) f4(1, (2, (3, 4))) 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) v3(1,(2,3)) v3(1,(2,3),4) v3(1,(2,3),4,5,6,7,8,9,0) print 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] print 'atoms' ### atom: '(' [testlist] ')' | '[' [testlist] ']' | '{' [dictmaker] '}' | '`' testlist '`' | NAME | NUMBER | STRING ### dictmaker: 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 = `x` x = `1 or 2 or 3` x = x x = 'x' x = 123 ### exprlist: expr (',' expr)* [','] ### testlist: test (',' test)* [','] # These have been exercised enough above print 'classdef' # 'class' NAME ['(' testlist ')'] ':' suite class B: 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 # list comprehension tests nums = [1, 2, 3, 4, 5] strs = ["Apple", "Banana", "Coconut"] spcs = [" Apple", " Banana ", "Coco nut "] print [s.strip() for s in spcs] print [3 * x for x in nums] print [x for x in nums if x > 2] print [(i, s) for i in nums for s in strs] print [(i, s) for i in nums for s in [f for f in strs if "n" in f]] print [(lambda a:[a**i for i in range(a+1)])(j) for j in range(5)] def test_in_func(l): return [None < x < 3 for x in l if x > 2] print test_in_func(nums) def test_nested_front(): print [[y for y in [x, x + 1]] for x in [1,3,5]] test_nested_front() check_syntax("[i, s for i in nums for s in strs]") check_syntax("[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) ] print [ (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 ] # generator expression tests g = ([x for x in range(10)] for x in range(1)) verify(g.next() == [x for x in range(10)]) try: g.next() raise TestFailed, 'should produce StopIteration exception' except StopIteration: pass a = 1 try: g = (a for d in a) g.next() raise TestFailed, 'should produce TypeError' except TypeError: pass verify(list((x, y) for x in 'abcd' for y in 'abcd') == [(x, y) for x in 'abcd' for y in 'abcd']) verify(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)) verify(sum(b) == sum([x for x in range(10)])) verify(sum(x**2 for x in range(10)) == sum([x**2 for x in range(10)])) verify(sum(x*x for x in range(10) if x%2) == sum([x*x for x in range(10) if x%2])) verify(sum(x for x in (y for y in range(10))) == sum([x for x in range(10)])) verify(sum(x for x in (y for y in (z for z in range(10)))) == sum([x for x in range(10)])) verify(sum(x for x in [y for y in (z for z in range(10))]) == sum([x for x in range(10)])) verify(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)])) verify(sum(x for x in (y for y in (z for z in range(10) if True) if False) if True) == 0) check_syntax("foo(x for x in range(10), 100)") check_syntax("foo(100, x for x in range(10))") # test for outmost iterable precomputation x = 10; g = (i for i in range(x)); x = 5 verify(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; verify([(i,j) for i in range(10) for j in range(5)] == list(g))