Mini Shell
import test.test_support
compiler = test.test_support.import_module('compiler', deprecated=True)
from compiler.ast import flatten
import os, sys, time, unittest
from random import random
from StringIO import StringIO
# How much time in seconds can pass before we print a 'Still working' message.
_PRINT_WORKING_MSG_INTERVAL = 5 * 60
class TrivialContext(object):
def __enter__(self):
return self
def __exit__(self, *exc_info):
pass
class CompilerTest(unittest.TestCase):
def testCompileLibrary(self):
# A simple but large test. Compile all the code in the
# standard library and its test suite. This doesn't verify
# that any of the code is correct, merely the compiler is able
# to generate some kind of code for it.
next_time = time.time() + _PRINT_WORKING_MSG_INTERVAL
# warning: if 'os' or 'test_support' are moved in some other dir,
# they should be changed here.
libdir = os.path.dirname(os.__file__)
testdir = os.path.dirname(test.test_support.__file__)
for dir in [testdir]:
for basename in "test_os.py",:
# Print still working message since this test can be really slow
if next_time <= time.time():
next_time = time.time() + _PRINT_WORKING_MSG_INTERVAL
print >>sys.__stdout__, \
' testCompileLibrary still working, be patient...'
sys.__stdout__.flush()
if not basename.endswith(".py"):
continue
if not TEST_ALL and random() < 0.98:
continue
path = os.path.join(dir, basename)
if test.test_support.verbose:
print "compiling", path
f = open(path, "U")
buf = f.read()
f.close()
if "badsyntax" in basename or "bad_coding" in basename:
self.assertRaises(SyntaxError, compiler.compile,
buf, basename, "exec")
else:
try:
compiler.compile(buf, basename, "exec")
except Exception, e:
args = list(e.args)
args.append("in file %s]" % basename)
#args[0] += "[in file %s]" % basename
e.args = tuple(args)
raise
def testNewClassSyntax(self):
compiler.compile("class foo():pass\n\n","<string>","exec")
def testYieldExpr(self):
compiler.compile("def g(): yield\n\n", "<string>", "exec")
def testKeywordAfterStarargs(self):
def f(*args, **kwargs):
self.assertEqual((args, kwargs), ((2,3), {'x': 1, 'y': 4}))
c = compiler.compile('f(x=1, *(2, 3), y=4)', '<string>', 'exec')
exec c in {'f': f}
self.assertRaises(SyntaxError, compiler.parse, "foo(a=1, b)")
self.assertRaises(SyntaxError, compiler.parse, "foo(1, *args, 3)")
def testTryExceptFinally(self):
# Test that except and finally clauses in one try stmt are recognized
c = compiler.compile("try:\n 1//0\nexcept:\n e = 1\nfinally:\n f = 1",
"<string>", "exec")
dct = {}
exec c in dct
self.assertEqual(dct.get('e'), 1)
self.assertEqual(dct.get('f'), 1)
def testDefaultArgs(self):
self.assertRaises(SyntaxError, compiler.parse, "def foo(a=1, b): pass")
def testDocstrings(self):
c = compiler.compile('"doc"', '<string>', 'exec')
self.assertIn('__doc__', c.co_names)
c = compiler.compile('def f():\n "doc"', '<string>', 'exec')
g = {}
exec c in g
self.assertEqual(g['f'].__doc__, "doc")
def testLineNo(self):
# Test that all nodes except Module have a correct lineno attribute.
filename = __file__
if filename.endswith((".pyc", ".pyo")):
filename = filename[:-1]
tree = compiler.parseFile(filename)
self.check_lineno(tree)
def check_lineno(self, node):
try:
self._check_lineno(node)
except AssertionError:
print node.__class__, node.lineno
raise
def _check_lineno(self, node):
if not node.__class__ in NOLINENO:
self.assertIsInstance(node.lineno, int,
"lineno=%s on %s" % (node.lineno, node.__class__))
self.assertTrue(node.lineno > 0,
"lineno=%s on %s" % (node.lineno, node.__class__))
for child in node.getChildNodes():
self.check_lineno(child)
def testFlatten(self):
self.assertEqual(flatten([1, [2]]), [1, 2])
self.assertEqual(flatten((1, (2,))), [1, 2])
def testNestedScope(self):
c = compiler.compile('def g():\n'
' a = 1\n'
' def f(): return a + 2\n'
' return f()\n'
'result = g()',
'<string>',
'exec')
dct = {}
exec c in dct
self.assertEqual(dct.get('result'), 3)
def testGenExp(self):
c = compiler.compile('list((i,j) for i in range(3) if i < 3'
' for j in range(4) if j > 2)',
'<string>',
'eval')
self.assertEqual(eval(c), [(0, 3), (1, 3), (2, 3)])
def testSetLiteral(self):
c = compiler.compile('{1, 2, 3}', '<string>', 'eval')
self.assertEqual(eval(c), {1,2,3})
c = compiler.compile('{1, 2, 3,}', '<string>', 'eval')
self.assertEqual(eval(c), {1,2,3})
def testDictLiteral(self):
c = compiler.compile('{1:2, 2:3, 3:4}', '<string>', 'eval')
self.assertEqual(eval(c), {1:2, 2:3, 3:4})
c = compiler.compile('{1:2, 2:3, 3:4,}', '<string>', 'eval')
self.assertEqual(eval(c), {1:2, 2:3, 3:4})
def testSetComp(self):
c = compiler.compile('{x for x in range(1, 4)}', '<string>', 'eval')
self.assertEqual(eval(c), {1, 2, 3})
c = compiler.compile('{x * y for x in range(3) if x != 0'
' for y in range(4) if y != 0}',
'<string>',
'eval')
self.assertEqual(eval(c), {1, 2, 3, 4, 6})
def testDictComp(self):
c = compiler.compile('{x:x+1 for x in range(1, 4)}', '<string>', 'eval')
self.assertEqual(eval(c), {1:2, 2:3, 3:4})
c = compiler.compile('{(x, y) : y for x in range(2) if x != 0'
' for y in range(3) if y != 0}',
'<string>',
'eval')
self.assertEqual(eval(c), {(1, 2): 2, (1, 1): 1})
def testWith(self):
# SF bug 1638243
c = compiler.compile('from __future__ import with_statement\n'
'def f():\n'
' with TrivialContext():\n'
' return 1\n'
'result = f()',
'<string>',
'exec' )
dct = {'TrivialContext': TrivialContext}
exec c in dct
self.assertEqual(dct.get('result'), 1)
def testWithAss(self):
c = compiler.compile('from __future__ import with_statement\n'
'def f():\n'
' with TrivialContext() as tc:\n'
' return 1\n'
'result = f()',
'<string>',
'exec' )
dct = {'TrivialContext': TrivialContext}
exec c in dct
self.assertEqual(dct.get('result'), 1)
def testWithMult(self):
events = []
class Ctx:
def __init__(self, n):
self.n = n
def __enter__(self):
events.append(self.n)
def __exit__(self, *args):
pass
c = compiler.compile('from __future__ import with_statement\n'
'def f():\n'
' with Ctx(1) as tc, Ctx(2) as tc2:\n'
' return 1\n'
'result = f()',
'<string>',
'exec' )
dct = {'Ctx': Ctx}
exec c in dct
self.assertEqual(dct.get('result'), 1)
self.assertEqual(events, [1, 2])
def testGlobal(self):
code = compiler.compile('global x\nx=1', '<string>', 'exec')
d1 = {'__builtins__': {}}
d2 = {}
exec code in d1, d2
# x should be in the globals dict
self.assertEqual(d1.get('x'), 1)
def testPrintFunction(self):
c = compiler.compile('from __future__ import print_function\n'
'print("a", "b", sep="**", end="++", '
'file=output)',
'<string>',
'exec' )
dct = {'output': StringIO()}
exec c in dct
self.assertEqual(dct['output'].getvalue(), 'a**b++')
def _testErrEnc(self, src, text, offset):
try:
compile(src, "", "exec")
except SyntaxError, e:
self.assertEqual(e.offset, offset)
self.assertEqual(e.text, text)
def testSourceCodeEncodingsError(self):
# Test SyntaxError with encoding definition
sjis = "print '\x83\x70\x83\x43\x83\x5c\x83\x93', '\n"
ascii = "print '12345678', '\n"
encdef = "#! -*- coding: ShiftJIS -*-\n"
# ascii source without encdef
self._testErrEnc(ascii, ascii, 19)
# ascii source with encdef
self._testErrEnc(encdef+ascii, ascii, 19)
# non-ascii source with encdef
self._testErrEnc(encdef+sjis, sjis, 19)
# ShiftJIS source without encdef
self._testErrEnc(sjis, sjis, 19)
NOLINENO = (compiler.ast.Module, compiler.ast.Stmt, compiler.ast.Discard)
###############################################################################
# code below is just used to trigger some possible errors, for the benefit of
# testLineNo
###############################################################################
class Toto:
"""docstring"""
pass
a, b = 2, 3
[c, d] = 5, 6
l = [(x, y) for x, y in zip(range(5), range(5,10))]
l[0]
l[3:4]
d = {'a': 2}
d = {}
d = {x: y for x, y in zip(range(5), range(5,10))}
s = {x for x in range(10)}
s = {1}
t = ()
t = (1, 2)
l = []
l = [1, 2]
if l:
pass
else:
a, b = b, a
try:
print yo
except:
yo = 3
else:
yo += 3
try:
a += b
finally:
b = 0
from math import *
###############################################################################
def test_main():
global TEST_ALL
TEST_ALL = test.test_support.is_resource_enabled("cpu")
test.test_support.run_unittest(CompilerTest)
if __name__ == "__main__":
test_main()
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