4710c53dca
These files are a subset of the python-2.7.2.tgz distribution from python.org. Changed files from PyMod-2.7.2 have been copied into the corresponding directories of this tree, replacing the original files in the distribution. Signed-off-by: daryl.mcdaniel@intel.com git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13197 6f19259b-4bc3-4df7-8a09-765794883524
665 lines
16 KiB
Python
665 lines
16 KiB
Python
import unittest
|
|
from test.test_support import check_syntax_error, check_py3k_warnings, \
|
|
check_warnings, run_unittest
|
|
|
|
|
|
class ScopeTests(unittest.TestCase):
|
|
|
|
def testSimpleNesting(self):
|
|
|
|
def make_adder(x):
|
|
def adder(y):
|
|
return x + y
|
|
return adder
|
|
|
|
inc = make_adder(1)
|
|
plus10 = make_adder(10)
|
|
|
|
self.assertEqual(inc(1), 2)
|
|
self.assertEqual(plus10(-2), 8)
|
|
|
|
def testExtraNesting(self):
|
|
|
|
def make_adder2(x):
|
|
def extra(): # check freevars passing through non-use scopes
|
|
def adder(y):
|
|
return x + y
|
|
return adder
|
|
return extra()
|
|
|
|
inc = make_adder2(1)
|
|
plus10 = make_adder2(10)
|
|
|
|
self.assertEqual(inc(1), 2)
|
|
self.assertEqual(plus10(-2), 8)
|
|
|
|
def testSimpleAndRebinding(self):
|
|
|
|
def make_adder3(x):
|
|
def adder(y):
|
|
return x + y
|
|
x = x + 1 # check tracking of assignment to x in defining scope
|
|
return adder
|
|
|
|
inc = make_adder3(0)
|
|
plus10 = make_adder3(9)
|
|
|
|
self.assertEqual(inc(1), 2)
|
|
self.assertEqual(plus10(-2), 8)
|
|
|
|
def testNestingGlobalNoFree(self):
|
|
|
|
def make_adder4(): # XXX add exta level of indirection
|
|
def nest():
|
|
def nest():
|
|
def adder(y):
|
|
return global_x + y # check that plain old globals work
|
|
return adder
|
|
return nest()
|
|
return nest()
|
|
|
|
global_x = 1
|
|
adder = make_adder4()
|
|
self.assertEqual(adder(1), 2)
|
|
|
|
global_x = 10
|
|
self.assertEqual(adder(-2), 8)
|
|
|
|
def testNestingThroughClass(self):
|
|
|
|
def make_adder5(x):
|
|
class Adder:
|
|
def __call__(self, y):
|
|
return x + y
|
|
return Adder()
|
|
|
|
inc = make_adder5(1)
|
|
plus10 = make_adder5(10)
|
|
|
|
self.assertEqual(inc(1), 2)
|
|
self.assertEqual(plus10(-2), 8)
|
|
|
|
def testNestingPlusFreeRefToGlobal(self):
|
|
|
|
def make_adder6(x):
|
|
global global_nest_x
|
|
def adder(y):
|
|
return global_nest_x + y
|
|
global_nest_x = x
|
|
return adder
|
|
|
|
inc = make_adder6(1)
|
|
plus10 = make_adder6(10)
|
|
|
|
self.assertEqual(inc(1), 11) # there's only one global
|
|
self.assertEqual(plus10(-2), 8)
|
|
|
|
def testNearestEnclosingScope(self):
|
|
|
|
def f(x):
|
|
def g(y):
|
|
x = 42 # check that this masks binding in f()
|
|
def h(z):
|
|
return x + z
|
|
return h
|
|
return g(2)
|
|
|
|
test_func = f(10)
|
|
self.assertEqual(test_func(5), 47)
|
|
|
|
def testMixedFreevarsAndCellvars(self):
|
|
|
|
def identity(x):
|
|
return x
|
|
|
|
def f(x, y, z):
|
|
def g(a, b, c):
|
|
a = a + x # 3
|
|
def h():
|
|
# z * (4 + 9)
|
|
# 3 * 13
|
|
return identity(z * (b + y))
|
|
y = c + z # 9
|
|
return h
|
|
return g
|
|
|
|
g = f(1, 2, 3)
|
|
h = g(2, 4, 6)
|
|
self.assertEqual(h(), 39)
|
|
|
|
def testFreeVarInMethod(self):
|
|
|
|
def test():
|
|
method_and_var = "var"
|
|
class Test:
|
|
def method_and_var(self):
|
|
return "method"
|
|
def test(self):
|
|
return method_and_var
|
|
def actual_global(self):
|
|
return str("global")
|
|
def str(self):
|
|
return str(self)
|
|
return Test()
|
|
|
|
t = test()
|
|
self.assertEqual(t.test(), "var")
|
|
self.assertEqual(t.method_and_var(), "method")
|
|
self.assertEqual(t.actual_global(), "global")
|
|
|
|
method_and_var = "var"
|
|
class Test:
|
|
# this class is not nested, so the rules are different
|
|
def method_and_var(self):
|
|
return "method"
|
|
def test(self):
|
|
return method_and_var
|
|
def actual_global(self):
|
|
return str("global")
|
|
def str(self):
|
|
return str(self)
|
|
|
|
t = Test()
|
|
self.assertEqual(t.test(), "var")
|
|
self.assertEqual(t.method_and_var(), "method")
|
|
self.assertEqual(t.actual_global(), "global")
|
|
|
|
def testRecursion(self):
|
|
|
|
def f(x):
|
|
def fact(n):
|
|
if n == 0:
|
|
return 1
|
|
else:
|
|
return n * fact(n - 1)
|
|
if x >= 0:
|
|
return fact(x)
|
|
else:
|
|
raise ValueError, "x must be >= 0"
|
|
|
|
self.assertEqual(f(6), 720)
|
|
|
|
|
|
def testUnoptimizedNamespaces(self):
|
|
|
|
check_syntax_error(self, """\
|
|
def unoptimized_clash1(strip):
|
|
def f(s):
|
|
from string import *
|
|
return strip(s) # ambiguity: free or local
|
|
return f
|
|
""")
|
|
|
|
check_syntax_error(self, """\
|
|
def unoptimized_clash2():
|
|
from string import *
|
|
def f(s):
|
|
return strip(s) # ambiguity: global or local
|
|
return f
|
|
""")
|
|
|
|
check_syntax_error(self, """\
|
|
def unoptimized_clash2():
|
|
from string import *
|
|
def g():
|
|
def f(s):
|
|
return strip(s) # ambiguity: global or local
|
|
return f
|
|
""")
|
|
|
|
# XXX could allow this for exec with const argument, but what's the point
|
|
check_syntax_error(self, """\
|
|
def error(y):
|
|
exec "a = 1"
|
|
def f(x):
|
|
return x + y
|
|
return f
|
|
""")
|
|
|
|
check_syntax_error(self, """\
|
|
def f(x):
|
|
def g():
|
|
return x
|
|
del x # can't del name
|
|
""")
|
|
|
|
check_syntax_error(self, """\
|
|
def f():
|
|
def g():
|
|
from string import *
|
|
return strip # global or local?
|
|
""")
|
|
|
|
# and verify a few cases that should work
|
|
|
|
exec """
|
|
def noproblem1():
|
|
from string import *
|
|
f = lambda x:x
|
|
|
|
def noproblem2():
|
|
from string import *
|
|
def f(x):
|
|
return x + 1
|
|
|
|
def noproblem3():
|
|
from string import *
|
|
def f(x):
|
|
global y
|
|
y = x
|
|
"""
|
|
|
|
def testLambdas(self):
|
|
|
|
f1 = lambda x: lambda y: x + y
|
|
inc = f1(1)
|
|
plus10 = f1(10)
|
|
self.assertEqual(inc(1), 2)
|
|
self.assertEqual(plus10(5), 15)
|
|
|
|
f2 = lambda x: (lambda : lambda y: x + y)()
|
|
inc = f2(1)
|
|
plus10 = f2(10)
|
|
self.assertEqual(inc(1), 2)
|
|
self.assertEqual(plus10(5), 15)
|
|
|
|
f3 = lambda x: lambda y: global_x + y
|
|
global_x = 1
|
|
inc = f3(None)
|
|
self.assertEqual(inc(2), 3)
|
|
|
|
f8 = lambda x, y, z: lambda a, b, c: lambda : z * (b + y)
|
|
g = f8(1, 2, 3)
|
|
h = g(2, 4, 6)
|
|
self.assertEqual(h(), 18)
|
|
|
|
def testUnboundLocal(self):
|
|
|
|
def errorInOuter():
|
|
print y
|
|
def inner():
|
|
return y
|
|
y = 1
|
|
|
|
def errorInInner():
|
|
def inner():
|
|
return y
|
|
inner()
|
|
y = 1
|
|
|
|
self.assertRaises(UnboundLocalError, errorInOuter)
|
|
self.assertRaises(NameError, errorInInner)
|
|
|
|
# test for bug #1501934: incorrect LOAD/STORE_GLOBAL generation
|
|
exec """
|
|
global_x = 1
|
|
def f():
|
|
global_x += 1
|
|
try:
|
|
f()
|
|
except UnboundLocalError:
|
|
pass
|
|
else:
|
|
fail('scope of global_x not correctly determined')
|
|
""" in {'fail': self.fail}
|
|
|
|
def testComplexDefinitions(self):
|
|
|
|
def makeReturner(*lst):
|
|
def returner():
|
|
return lst
|
|
return returner
|
|
|
|
self.assertEqual(makeReturner(1,2,3)(), (1,2,3))
|
|
|
|
def makeReturner2(**kwargs):
|
|
def returner():
|
|
return kwargs
|
|
return returner
|
|
|
|
self.assertEqual(makeReturner2(a=11)()['a'], 11)
|
|
|
|
with check_py3k_warnings(("tuple parameter unpacking has been removed",
|
|
SyntaxWarning)):
|
|
exec """\
|
|
def makeAddPair((a, b)):
|
|
def addPair((c, d)):
|
|
return (a + c, b + d)
|
|
return addPair
|
|
""" in locals()
|
|
self.assertEqual(makeAddPair((1, 2))((100, 200)), (101,202))
|
|
|
|
def testScopeOfGlobalStmt(self):
|
|
# Examples posted by Samuele Pedroni to python-dev on 3/1/2001
|
|
|
|
exec """\
|
|
# I
|
|
x = 7
|
|
def f():
|
|
x = 1
|
|
def g():
|
|
global x
|
|
def i():
|
|
def h():
|
|
return x
|
|
return h()
|
|
return i()
|
|
return g()
|
|
self.assertEqual(f(), 7)
|
|
self.assertEqual(x, 7)
|
|
|
|
# II
|
|
x = 7
|
|
def f():
|
|
x = 1
|
|
def g():
|
|
x = 2
|
|
def i():
|
|
def h():
|
|
return x
|
|
return h()
|
|
return i()
|
|
return g()
|
|
self.assertEqual(f(), 2)
|
|
self.assertEqual(x, 7)
|
|
|
|
# III
|
|
x = 7
|
|
def f():
|
|
x = 1
|
|
def g():
|
|
global x
|
|
x = 2
|
|
def i():
|
|
def h():
|
|
return x
|
|
return h()
|
|
return i()
|
|
return g()
|
|
self.assertEqual(f(), 2)
|
|
self.assertEqual(x, 2)
|
|
|
|
# IV
|
|
x = 7
|
|
def f():
|
|
x = 3
|
|
def g():
|
|
global x
|
|
x = 2
|
|
def i():
|
|
def h():
|
|
return x
|
|
return h()
|
|
return i()
|
|
return g()
|
|
self.assertEqual(f(), 2)
|
|
self.assertEqual(x, 2)
|
|
|
|
# XXX what about global statements in class blocks?
|
|
# do they affect methods?
|
|
|
|
x = 12
|
|
class Global:
|
|
global x
|
|
x = 13
|
|
def set(self, val):
|
|
x = val
|
|
def get(self):
|
|
return x
|
|
|
|
g = Global()
|
|
self.assertEqual(g.get(), 13)
|
|
g.set(15)
|
|
self.assertEqual(g.get(), 13)
|
|
"""
|
|
|
|
def testLeaks(self):
|
|
|
|
class Foo:
|
|
count = 0
|
|
|
|
def __init__(self):
|
|
Foo.count += 1
|
|
|
|
def __del__(self):
|
|
Foo.count -= 1
|
|
|
|
def f1():
|
|
x = Foo()
|
|
def f2():
|
|
return x
|
|
f2()
|
|
|
|
for i in range(100):
|
|
f1()
|
|
|
|
self.assertEqual(Foo.count, 0)
|
|
|
|
def testClassAndGlobal(self):
|
|
|
|
exec """\
|
|
def test(x):
|
|
class Foo:
|
|
global x
|
|
def __call__(self, y):
|
|
return x + y
|
|
return Foo()
|
|
|
|
x = 0
|
|
self.assertEqual(test(6)(2), 8)
|
|
x = -1
|
|
self.assertEqual(test(3)(2), 5)
|
|
|
|
looked_up_by_load_name = False
|
|
class X:
|
|
# Implicit globals inside classes are be looked up by LOAD_NAME, not
|
|
# LOAD_GLOBAL.
|
|
locals()['looked_up_by_load_name'] = True
|
|
passed = looked_up_by_load_name
|
|
|
|
self.assertTrue(X.passed)
|
|
"""
|
|
|
|
def testLocalsFunction(self):
|
|
|
|
def f(x):
|
|
def g(y):
|
|
def h(z):
|
|
return y + z
|
|
w = x + y
|
|
y += 3
|
|
return locals()
|
|
return g
|
|
|
|
d = f(2)(4)
|
|
self.assertIn('h', d)
|
|
del d['h']
|
|
self.assertEqual(d, {'x': 2, 'y': 7, 'w': 6})
|
|
|
|
def testLocalsClass(self):
|
|
# This test verifies that calling locals() does not pollute
|
|
# the local namespace of the class with free variables. Old
|
|
# versions of Python had a bug, where a free variable being
|
|
# passed through a class namespace would be inserted into
|
|
# locals() by locals() or exec or a trace function.
|
|
#
|
|
# The real bug lies in frame code that copies variables
|
|
# between fast locals and the locals dict, e.g. when executing
|
|
# a trace function.
|
|
|
|
def f(x):
|
|
class C:
|
|
x = 12
|
|
def m(self):
|
|
return x
|
|
locals()
|
|
return C
|
|
|
|
self.assertEqual(f(1).x, 12)
|
|
|
|
def f(x):
|
|
class C:
|
|
y = x
|
|
def m(self):
|
|
return x
|
|
z = list(locals())
|
|
return C
|
|
|
|
varnames = f(1).z
|
|
self.assertNotIn("x", varnames)
|
|
self.assertIn("y", varnames)
|
|
|
|
def testLocalsClass_WithTrace(self):
|
|
# Issue23728: after the trace function returns, the locals()
|
|
# dictionary is used to update all variables, this used to
|
|
# include free variables. But in class statements, free
|
|
# variables are not inserted...
|
|
import sys
|
|
sys.settrace(lambda a,b,c:None)
|
|
try:
|
|
x = 12
|
|
|
|
class C:
|
|
def f(self):
|
|
return x
|
|
|
|
self.assertEqual(x, 12) # Used to raise UnboundLocalError
|
|
finally:
|
|
sys.settrace(None)
|
|
|
|
def testBoundAndFree(self):
|
|
# var is bound and free in class
|
|
|
|
def f(x):
|
|
class C:
|
|
def m(self):
|
|
return x
|
|
a = x
|
|
return C
|
|
|
|
inst = f(3)()
|
|
self.assertEqual(inst.a, inst.m())
|
|
|
|
def testInteractionWithTraceFunc(self):
|
|
|
|
import sys
|
|
def tracer(a,b,c):
|
|
return tracer
|
|
|
|
def adaptgetter(name, klass, getter):
|
|
kind, des = getter
|
|
if kind == 1: # AV happens when stepping from this line to next
|
|
if des == "":
|
|
des = "_%s__%s" % (klass.__name__, name)
|
|
return lambda obj: getattr(obj, des)
|
|
|
|
class TestClass:
|
|
pass
|
|
|
|
sys.settrace(tracer)
|
|
adaptgetter("foo", TestClass, (1, ""))
|
|
sys.settrace(None)
|
|
|
|
self.assertRaises(TypeError, sys.settrace)
|
|
|
|
def testEvalExecFreeVars(self):
|
|
|
|
def f(x):
|
|
return lambda: x + 1
|
|
|
|
g = f(3)
|
|
self.assertRaises(TypeError, eval, g.func_code)
|
|
|
|
try:
|
|
exec g.func_code in {}
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("exec should have failed, because code contained free vars")
|
|
|
|
def testListCompLocalVars(self):
|
|
|
|
try:
|
|
print bad
|
|
except NameError:
|
|
pass
|
|
else:
|
|
print "bad should not be defined"
|
|
|
|
def x():
|
|
[bad for s in 'a b' for bad in s.split()]
|
|
|
|
x()
|
|
try:
|
|
print bad
|
|
except NameError:
|
|
pass
|
|
|
|
def testEvalFreeVars(self):
|
|
|
|
def f(x):
|
|
def g():
|
|
x
|
|
eval("x + 1")
|
|
return g
|
|
|
|
f(4)()
|
|
|
|
def testFreeingCell(self):
|
|
# Test what happens when a finalizer accesses
|
|
# the cell where the object was stored.
|
|
class Special:
|
|
def __del__(self):
|
|
nestedcell_get()
|
|
|
|
def f():
|
|
global nestedcell_get
|
|
def nestedcell_get():
|
|
return c
|
|
|
|
c = (Special(),)
|
|
c = 2
|
|
|
|
f() # used to crash the interpreter...
|
|
|
|
def testGlobalInParallelNestedFunctions(self):
|
|
# A symbol table bug leaked the global statement from one
|
|
# function to other nested functions in the same block.
|
|
# This test verifies that a global statement in the first
|
|
# function does not affect the second function.
|
|
CODE = """def f():
|
|
y = 1
|
|
def g():
|
|
global y
|
|
return y
|
|
def h():
|
|
return y + 1
|
|
return g, h
|
|
|
|
y = 9
|
|
g, h = f()
|
|
result9 = g()
|
|
result2 = h()
|
|
"""
|
|
local_ns = {}
|
|
global_ns = {}
|
|
exec CODE in local_ns, global_ns
|
|
self.assertEqual(2, global_ns["result2"])
|
|
self.assertEqual(9, global_ns["result9"])
|
|
|
|
def testTopIsNotSignificant(self):
|
|
# See #9997.
|
|
def top(a):
|
|
pass
|
|
def b():
|
|
global a
|
|
|
|
|
|
def test_main():
|
|
with check_warnings(("import \* only allowed at module level",
|
|
SyntaxWarning)):
|
|
run_unittest(ScopeTests)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|