SF.net SVN: jython:[7235] trunk/jython/Lib/test/test_scope.py
[email protected] Mon, 14 Mar 2011 04:29:34 +0000
| Newsgroups | gmane.comp.lang.jython.cvs |
|---|---|
| Message-ID | <[email protected]> |
Revision: 7235
http://jython.svn.sourceforge.net/jython/?rev=7235&view=rev
Author: pjenvey
Date: 2011-03-14 04:29:34 +0000 (Mon, 14 Mar 2011)
Log Message:
-----------
from:
https://svn.python.org/projects/python/branches/release26-maint/Lib/test/test_scope.py@83635
Modified Paths:
--------------
trunk/jython/Lib/test/test_scope.py
Modified: trunk/jython/Lib/test/test_scope.py
===================================================================
--- trunk/jython/Lib/test/test_scope.py 2011-03-14 03:34:15 UTC (rev 7234)
+++ trunk/jython/Lib/test/test_scope.py 2011-03-14 04:29:34 UTC (rev 7235)
@@ -1,192 +1,188 @@
-from test.test_support import verify, TestFailed, check_syntax_error, vereq, is_jython
+import unittest
+from test.test_support import (check_syntax_error, _check_py3k_warnings,
+ check_warnings, run_unittest)
-import warnings
-warnings.filterwarnings("ignore", r"import \*", SyntaxWarning, "<string>")
-print "1. simple nesting"
+class ScopeTests(unittest.TestCase):
-def make_adder(x):
- def adder(y):
- return x + y
- return adder
+ def testSimpleNesting(self):
-inc = make_adder(1)
-plus10 = make_adder(10)
+ def make_adder(x):
+ def adder(y):
+ return x + y
+ return adder
-vereq(inc(1), 2)
-vereq(plus10(-2), 8)
+ inc = make_adder(1)
+ plus10 = make_adder(10)
-print "2. extra nesting"
+ self.assertEqual(inc(1), 2)
+ self.assertEqual(plus10(-2), 8)
-def make_adder2(x):
- def extra(): # check freevars passing through non-use scopes
- def adder(y):
- return x + y
- return adder
- return extra()
+ def testExtraNesting(self):
-inc = make_adder2(1)
-plus10 = make_adder2(10)
+ def make_adder2(x):
+ def extra(): # check freevars passing through non-use scopes
+ def adder(y):
+ return x + y
+ return adder
+ return extra()
-vereq(inc(1), 2)
-vereq(plus10(-2), 8)
+ inc = make_adder2(1)
+ plus10 = make_adder2(10)
-print "3. simple nesting + rebinding"
+ self.assertEqual(inc(1), 2)
+ self.assertEqual(plus10(-2), 8)
-def make_adder3(x):
- def adder(y):
- return x + y
- x = x + 1 # check tracking of assignment to x in defining scope
- return adder
+ def testSimpleAndRebinding(self):
-inc = make_adder3(0)
-plus10 = make_adder3(9)
+ def make_adder3(x):
+ def adder(y):
+ return x + y
+ x = x + 1 # check tracking of assignment to x in defining scope
+ return adder
-vereq(inc(1), 2)
-vereq(plus10(-2), 8)
+ inc = make_adder3(0)
+ plus10 = make_adder3(9)
-print "4. nesting with global but no free"
+ self.assertEqual(inc(1), 2)
+ self.assertEqual(plus10(-2), 8)
-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()
+ def testNestingGlobalNoFree(self):
-global_x = 1
-adder = make_adder4()
-vereq(adder(1), 2)
+ 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 = 10
-vereq(adder(-2), 8)
+ global_x = 1
+ adder = make_adder4()
+ self.assertEqual(adder(1), 2)
-print "5. nesting through class"
+ global_x = 10
+ self.assertEqual(adder(-2), 8)
-def make_adder5(x):
- class Adder:
- def __call__(self, y):
- return x + y
- return Adder()
+ def testNestingThroughClass(self):
-inc = make_adder5(1)
-plus10 = make_adder5(10)
+ def make_adder5(x):
+ class Adder:
+ def __call__(self, y):
+ return x + y
+ return Adder()
-vereq(inc(1), 2)
-vereq(plus10(-2), 8)
+ inc = make_adder5(1)
+ plus10 = make_adder5(10)
-print "6. nesting plus free ref to global"
+ self.assertEqual(inc(1), 2)
+ self.assertEqual(plus10(-2), 8)
-def make_adder6(x):
- global global_nest_x
- def adder(y):
- return global_nest_x + y
- global_nest_x = x
- return adder
+ def testNestingPlusFreeRefToGlobal(self):
-inc = make_adder6(1)
-plus10 = make_adder6(10)
+ def make_adder6(x):
+ global global_nest_x
+ def adder(y):
+ return global_nest_x + y
+ global_nest_x = x
+ return adder
-vereq(inc(1), 11) # there's only one global
-vereq(plus10(-2), 8)
+ inc = make_adder6(1)
+ plus10 = make_adder6(10)
-print "7. nearest enclosing scope"
+ self.assertEqual(inc(1), 11) # there's only one global
+ self.assertEqual(plus10(-2), 8)
-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)
+ def testNearestEnclosingScope(self):
-test_func = f(10)
-vereq(test_func(5), 47)
+ 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)
-print "8. mixed freevars and cellvars"
+ test_func = f(10)
+ self.assertEqual(test_func(5), 47)
-def identity(x):
- return x
+ def testMixedFreevarsAndCellvars(self):
-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
+ def identity(x):
+ return x
-g = f(1, 2, 3)
-h = g(2, 4, 6)
-vereq(h(), 39)
+ 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
-print "9. free variable in method"
+ g = f(1, 2, 3)
+ h = g(2, 4, 6)
+ self.assertEqual(h(), 39)
-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()
+ def testFreeVarInMethod(self):
-t = test()
-vereq(t.test(), "var")
-vereq(t.method_and_var(), "method")
-vereq(t.actual_global(), "global")
+ 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()
-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")
-t = Test()
-vereq(t.test(), "var")
-vereq(t.method_and_var(), "method")
-vereq(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)
-print "10. recursion"
+ t = Test()
+ self.assertEqual(t.test(), "var")
+ self.assertEqual(t.method_and_var(), "method")
+ self.assertEqual(t.actual_global(), "global")
-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"
+ def testRecursion(self):
-vereq(f(6), 720)
+ 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)
-print "11. unoptimized namespaces"
-class FakeTestCase(object):
- def fail(self):
- raise TestFailed
+ def testUnoptimizedNamespaces(self):
-fake = FakeTestCase()
-
-check_syntax_error(fake, """\
+ check_syntax_error(self, """\
def unoptimized_clash1(strip):
def f(s):
from string import *
@@ -194,7 +190,7 @@
return f
""")
-check_syntax_error(fake, """\
+ check_syntax_error(self, """\
def unoptimized_clash2():
from string import *
def f(s):
@@ -202,7 +198,7 @@
return f
""")
-check_syntax_error(fake, """\
+ check_syntax_error(self, """\
def unoptimized_clash2():
from string import *
def g():
@@ -211,8 +207,8 @@
return f
""")
-# XXX could allow this for exec with const argument, but what's the point
-check_syntax_error(fake, """\
+ # 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):
@@ -220,23 +216,23 @@
return f
""")
-check_syntax_error(fake, """\
+ check_syntax_error(self, """\
def f(x):
def g():
return x
del x # can't del name
""")
-check_syntax_error(fake, """\
+ check_syntax_error(self, """\
def f():
def g():
- from string import *
- return strip # global or local?
+ from string import *
+ return strip # global or local?
""")
-# and verify a few cases that should work
+ # and verify a few cases that should work
-exec """
+ exec """
def noproblem1():
from string import *
f = lambda x:x
@@ -253,59 +249,60 @@
y = x
"""
-print "12. lambdas"
+ def testLambdas(self):
-f1 = lambda x: lambda y: x + y
-inc = f1(1)
-plus10 = f1(10)
-vereq(inc(1), 2)
-vereq(plus10(5), 15)
+ 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)
-vereq(inc(1), 2)
-vereq(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)
-vereq(inc(2), 3)
+ 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)
-vereq(h(), 18)
+ 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)
-print "13. UnboundLocal"
+ def testUnboundLocal(self):
-def errorInOuter():
- print y
- def inner():
- return y
- y = 1
+ def errorInOuter():
+ print y
+ def inner():
+ return y
+ y = 1
-def errorInInner():
- def inner():
- return y
- inner()
- y = 1
+ def errorInInner():
+ def inner():
+ return y
+ inner()
+ y = 1
-try:
- errorInOuter()
-except UnboundLocalError:
- pass
-else:
- raise TestFailed
+ try:
+ errorInOuter()
+ except UnboundLocalError:
+ pass
+ else:
+ self.fail()
-try:
- errorInInner()
-except NameError:
- pass
-else:
- raise TestFailed
+ try:
+ errorInInner()
+ except NameError:
+ pass
+ else:
+ self.fail()
-# test for bug #1501934: incorrect LOAD/STORE_GLOBAL generation
+ # test for bug #1501934: incorrect LOAD/STORE_GLOBAL generation
+ exec """
global_x = 1
def f():
global_x += 1
@@ -314,34 +311,39 @@
except UnboundLocalError:
pass
else:
- raise TestFailed, 'scope of global_x not correctly determined'
+ fail('scope of global_x not correctly determined')
+""" in {'fail': self.fail}
-print "14. complex definitions"
+ def testComplexDefinitions(self):
-def makeReturner(*lst):
- def returner():
- return lst
- return returner
+ def makeReturner(*lst):
+ def returner():
+ return lst
+ return returner
-vereq(makeReturner(1,2,3)(), (1,2,3))
+ self.assertEqual(makeReturner(1,2,3)(), (1,2,3))
-def makeReturner2(**kwargs):
- def returner():
- return kwargs
- return returner
+ def makeReturner2(**kwargs):
+ def returner():
+ return kwargs
+ return returner
-vereq(makeReturner2(a=11)()['a'], 11)
+ 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))
-vereq(makeAddPair((1, 2))((100, 200)), (101,202))
-
-print "15. scope of global statements"
+ def testScopeOfGlobalStmt(self):
# Examples posted by Samuele Pedroni to python-dev on 3/1/2001
+ exec """\
# I
x = 7
def f():
@@ -354,8 +356,8 @@
return h()
return i()
return g()
-vereq(f(), 7)
-vereq(x, 7)
+self.assertEqual(f(), 7)
+self.assertEqual(x, 7)
# II
x = 7
@@ -369,8 +371,8 @@
return h()
return i()
return g()
-vereq(f(), 2)
-vereq(x, 7)
+self.assertEqual(f(), 2)
+self.assertEqual(x, 7)
# III
x = 7
@@ -385,8 +387,8 @@
return h()
return i()
return g()
-vereq(f(), 2)
-vereq(x, 2)
+self.assertEqual(f(), 2)
+self.assertEqual(x, 2)
# IV
x = 7
@@ -401,8 +403,8 @@
return h()
return i()
return g()
-vereq(f(), 2)
-vereq(x, 2)
+self.assertEqual(f(), 2)
+self.assertEqual(x, 2)
# XXX what about global statements in class blocks?
# do they affect methods?
@@ -417,39 +419,36 @@
return x
g = Global()
-vereq(g.get(), 13)
+self.assertEqual(g.get(), 13)
g.set(15)
-vereq(g.get(), 13)
+self.assertEqual(g.get(), 13)
+"""
-print "16. check leaks"
+ def testLeaks(self):
-class Foo:
- count = 0
+ class Foo:
+ count = 0
- def __init__(self):
- Foo.count += 1
+ def __init__(self):
+ Foo.count += 1
- def __del__(self):
- Foo.count -= 1
+ def __del__(self):
+ Foo.count -= 1
-def f1():
- x = Foo()
- def f2():
- return x
- f2()
+ def f1():
+ x = Foo()
+ def f2():
+ return x
+ f2()
-for i in range(100):
- f1()
+ for i in range(100):
+ f1()
-if is_jython:
- from test_weakref import extra_collect
- # A lot of garbage
- for i in range(3):
- extra_collect()
-vereq(Foo.count, 0)
+ self.assertEqual(Foo.count, 0)
-print "17. class and global"
+ def testClassAndGlobal(self):
+ exec """\
def test(x):
class Foo:
global x
@@ -458,9 +457,9 @@
return Foo()
x = 0
-vereq(test(6)(2), 8)
+self.assertEqual(test(6)(2), 8)
x = -1
-vereq(test(3)(2), 5)
+self.assertEqual(test(3)(2), 5)
looked_up_by_load_name = False
class X:
@@ -469,104 +468,201 @@
locals()['looked_up_by_load_name'] = True
passed = looked_up_by_load_name
-verify(X.passed)
+self.assert_(X.passed)
+"""
-print "18. verify that locals() works"
+ def testLocalsFunction(self):
-def f(x):
- def g(y):
- def h(z):
- return y + z
- w = x + y
- y += 3
- return locals()
- return g
+ 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)
-verify(d.has_key('h'))
-del d['h']
-vereq(d, {'x': 2, 'y': 7, 'w': 6})
+ d = f(2)(4)
+ self.assertTrue('h' in d)
+ del d['h']
+ self.assertEqual(d, {'x': 2, 'y': 7, 'w': 6})
-print "19. var is bound and free in class"
+ 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:
- def m(self):
- return x
- a = x
- return C
+ def f(x):
+ class C:
+ x = 12
+ def m(self):
+ return x
+ locals()
+ return C
-inst = f(3)()
-vereq(inst.a, inst.m())
+ self.assertEqual(f(1).x, 12)
-print "20. interaction with trace function"
+ def f(x):
+ class C:
+ y = x
+ def m(self):
+ return x
+ z = list(locals())
+ return C
-import sys
-def tracer(a,b,c):
- return tracer
+ varnames = f(1).z
+ self.assert_("x" not in varnames)
+ self.assert_("y" in varnames)
-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)
+ 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 TestClass:
- pass
+ class C:
+ def f(self):
+ return x
-sys.settrace(tracer)
-adaptgetter("foo", TestClass, (1, ""))
-sys.settrace(None)
+ self.assertEquals(x, 12) # Used to raise UnboundLocalError
+ finally:
+ sys.settrace(None)
-try: sys.settrace()
-except TypeError: pass
-else: raise TestFailed, 'sys.settrace() did not raise TypeError'
+ def testBoundAndFree(self):
+ # var is bound and free in class
-print "20. eval and exec with free variables"
+ def f(x):
+ class C:
+ def m(self):
+ return x
+ a = x
+ return C
-def f(x):
- return lambda: x + 1
+ inst = f(3)()
+ self.assertEqual(inst.a, inst.m())
-g = f(3)
-try:
- eval(g.func_code)
-except TypeError:
- pass
-else:
- print "eval() should have failed, because code contained free vars"
+ def testInteractionWithTraceFunc(self):
-try:
- exec g.func_code
-except TypeError:
- pass
-else:
- print "exec should have failed, because code contained free vars"
+ import sys
+ def tracer(a,b,c):
+ return tracer
-print "21. list comprehension with local variables"
+ 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)
-try:
- print bad
-except NameError:
- pass
-else:
- print "bad should not be defined"
+ class TestClass:
+ pass
-def x():
- [bad for s in 'a b' for bad in s.split()]
+ sys.settrace(tracer)
+ adaptgetter("foo", TestClass, (1, ""))
+ sys.settrace(None)
-x()
-try:
- print bad
-except NameError:
- pass
+ self.assertRaises(TypeError, sys.settrace)
-print "22. eval with free variables"
+ def testEvalExecFreeVars(self):
-def f(x):
+ 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():
- x
- eval("x + 1")
- return g
+ global y
+ return y
+ def h():
+ return y + 1
+ return g, h
-f(4)()
+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 test_main():
+ with check_warnings(("import \* only allowed at module level",
+ SyntaxWarning)):
+ run_unittest(ScopeTests)
+
+if __name__ == '__main__':
+ test_main()
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