Whitespace normalization.

1 files changed, 560 insertions, 560 deletions

diff --git a/Lib/test/test_with.py b/Lib/test/test_with.py
index 9d809ef..3f32830 100644
--- a/Lib/test/test_with.py
+++ b/Lib/test/test_with.py
@@ -1,560 +1,560 @@
-#!/usr/bin/env python
-
-"""Unit tests for the with statement specified in PEP 343."""
-
-__author__ = "Mike Bland"
-__email__ = "mbland at acm dot org"
-
-import unittest
-from test.contextmanager import GeneratorContextManager
-from test.nested import nested
-from test.test_support import run_unittest
-
-
-class MockContextManager(GeneratorContextManager):
-    def __init__(self, gen):
-        GeneratorContextManager.__init__(self, gen)
-        self.context_called = False
-        self.enter_called = False
-        self.exit_called = False
-        self.exit_args = None
-
-    def __context__(self):
-        self.context_called = True
-        return GeneratorContextManager.__context__(self)
-
-    def __enter__(self):
-        self.enter_called = True
-        return GeneratorContextManager.__enter__(self)
-
-    def __exit__(self, type, value, traceback):
-        self.exit_called = True
-        self.exit_args = (type, value, traceback)
-        return GeneratorContextManager.__exit__(self, type, value, traceback)
-
-
-def mock_contextmanager(func):
-    def helper(*args, **kwds):
-        return MockContextManager(func(*args, **kwds))
-    return helper
-
-
-class MockResource(object):
-    def __init__(self):
-        self.yielded = False
-        self.stopped = False
-
-
-@mock_contextmanager
-def mock_contextmanager_generator():
-    mock = MockResource()
-    try:
-        mock.yielded = True
-        yield mock
-    finally:
-        mock.stopped = True
-
-
-class MockNested(nested):
-    def __init__(self, *contexts):
-        nested.__init__(self, *contexts)
-        self.context_called = False
-        self.enter_called = False
-        self.exit_called = False
-        self.exit_args = None
-
-    def __context__(self):
-        self.context_called = True
-        return nested.__context__(self)
-
-    def __enter__(self):
-        self.enter_called = True
-        return nested.__enter__(self)
-
-    def __exit__(self, *exc_info):
-        self.exit_called = True
-        self.exit_args = exc_info
-        return nested.__exit__(self, *exc_info)
-
- 
-class FailureTestCase(unittest.TestCase):
-    def testNameError(self):
-        def fooNotDeclared():
-            with foo: pass
-        self.assertRaises(NameError, fooNotDeclared)
-
-    def testContextAttributeError(self):
-        class LacksContext(object):
-            def __enter__(self):
-                pass
-
-            def __exit__(self, type, value, traceback):
-                pass
-
-        def fooLacksContext():
-            foo = LacksContext()
-            with foo: pass
-        self.assertRaises(AttributeError, fooLacksContext)
-
-    def testEnterAttributeError(self):
-        class LacksEnter(object):
-            def __context__(self):
-                pass
-
-            def __exit__(self, type, value, traceback):
-                pass
-
-        def fooLacksEnter():
-            foo = LacksEnter()
-            with foo: pass
-        self.assertRaises(AttributeError, fooLacksEnter)
-
-    def testExitAttributeError(self):
-        class LacksExit(object):
-            def __context__(self):
-                pass
-
-            def __enter__(self):
-                pass
-
-        def fooLacksExit():
-            foo = LacksExit()
-            with foo: pass
-        self.assertRaises(AttributeError, fooLacksExit)
-
-    def assertRaisesSyntaxError(self, codestr):
-        def shouldRaiseSyntaxError(s):
-            compile(s, '', 'single')
-        self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr)
-
-    def testAssignmentToNoneError(self):
-        self.assertRaisesSyntaxError('with mock as None:\n  pass')
-        self.assertRaisesSyntaxError(
-            'with mock as (None):\n'
-            '  pass')
-
-    def testAssignmentToEmptyTupleError(self):
-        self.assertRaisesSyntaxError(
-            'with mock as ():\n'
-            '  pass')
-
-    def testAssignmentToTupleOnlyContainingNoneError(self):
-        self.assertRaisesSyntaxError('with mock as None,:\n  pass')
-        self.assertRaisesSyntaxError(
-            'with mock as (None,):\n'
-            '  pass')
-
-    def testAssignmentToTupleContainingNoneError(self):
-        self.assertRaisesSyntaxError(
-            'with mock as (foo, None, bar):\n'
-            '  pass')
-
-    def testContextThrows(self):
-        class ContextThrows(object):
-            def __context__(self):
-                raise RuntimeError("Context threw")
-
-        def shouldThrow():
-            ct = ContextThrows()
-            self.foo = None
-            with ct as self.foo:
-                pass
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertEqual(self.foo, None)
-
-    def testEnterThrows(self):
-        class EnterThrows(object):
-            def __context__(self):
-                return self
-
-            def __enter__(self):
-                raise RuntimeError("Context threw")
-
-            def __exit__(self, *args):
-                pass
-
-        def shouldThrow():
-            ct = EnterThrows()
-            self.foo = None
-            with ct as self.foo:
-                pass
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertEqual(self.foo, None)
-
-    def testExitThrows(self):
-        class ExitThrows(object):
-            def __context__(self):
-                return self
-            def __enter__(self):
-                return
-            def __exit__(self, *args):
-                raise RuntimeError(42)
-        def shouldThrow():
-            with ExitThrows():
-                pass
-        self.assertRaises(RuntimeError, shouldThrow)
-
-class ContextmanagerAssertionMixin(object):
-    TEST_EXCEPTION = RuntimeError("test exception")
-
-    def assertInWithManagerInvariants(self, mock_manager):
-        self.assertTrue(mock_manager.context_called)
-        self.assertTrue(mock_manager.enter_called)
-        self.assertFalse(mock_manager.exit_called)
-        self.assertEqual(mock_manager.exit_args, None)
-
-    def assertAfterWithManagerInvariants(self, mock_manager, exit_args):
-        self.assertTrue(mock_manager.context_called)
-        self.assertTrue(mock_manager.enter_called)
-        self.assertTrue(mock_manager.exit_called)
-        self.assertEqual(mock_manager.exit_args, exit_args)
-
-    def assertAfterWithManagerInvariantsNoError(self, mock_manager):
-        self.assertAfterWithManagerInvariants(mock_manager,
-            (None, None, None))
-
-    def assertInWithGeneratorInvariants(self, mock_generator):
-        self.assertTrue(mock_generator.yielded)
-        self.assertFalse(mock_generator.stopped)
-
-    def assertAfterWithGeneratorInvariantsNoError(self, mock_generator):
-        self.assertTrue(mock_generator.yielded)
-        self.assertTrue(mock_generator.stopped)
-
-    def raiseTestException(self):
-        raise self.TEST_EXCEPTION
-
-    def assertAfterWithManagerInvariantsWithError(self, mock_manager):
-        self.assertTrue(mock_manager.context_called)
-        self.assertTrue(mock_manager.enter_called)
-        self.assertTrue(mock_manager.exit_called)
-        self.assertEqual(mock_manager.exit_args[0], RuntimeError)
-        self.assertEqual(mock_manager.exit_args[1], self.TEST_EXCEPTION)
-
-    def assertAfterWithGeneratorInvariantsWithError(self, mock_generator):
-        self.assertTrue(mock_generator.yielded)
-        self.assertTrue(mock_generator.stopped)
-
-
-class NonexceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):
-    def testInlineGeneratorSyntax(self):
-        with mock_contextmanager_generator():
-            pass
-
-    def testUnboundGenerator(self):
-        mock = mock_contextmanager_generator()
-        with mock:
-            pass
-        self.assertAfterWithManagerInvariantsNoError(mock)
-
-    def testInlineGeneratorBoundSyntax(self):
-        with mock_contextmanager_generator() as foo:
-            self.assertInWithGeneratorInvariants(foo)
-        # FIXME: In the future, we'll try to keep the bound names from leaking
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-
-    def testInlineGeneratorBoundToExistingVariable(self):
-        foo = None
-        with mock_contextmanager_generator() as foo:
-            self.assertInWithGeneratorInvariants(foo)
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-
-    def testInlineGeneratorBoundToDottedVariable(self):
-        with mock_contextmanager_generator() as self.foo:
-            self.assertInWithGeneratorInvariants(self.foo)
-        self.assertAfterWithGeneratorInvariantsNoError(self.foo)
-
-    def testBoundGenerator(self):
-        mock = mock_contextmanager_generator()
-        with mock as foo:
-            self.assertInWithGeneratorInvariants(foo)
-            self.assertInWithManagerInvariants(mock)
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-        self.assertAfterWithManagerInvariantsNoError(mock)
-
-    def testNestedSingleStatements(self):
-        mock_a = mock_contextmanager_generator()
-        with mock_a as foo:
-            mock_b = mock_contextmanager_generator()
-            with mock_b as bar:
-                self.assertInWithManagerInvariants(mock_a)
-                self.assertInWithManagerInvariants(mock_b)
-                self.assertInWithGeneratorInvariants(foo)
-                self.assertInWithGeneratorInvariants(bar)
-            self.assertAfterWithManagerInvariantsNoError(mock_b)
-            self.assertAfterWithGeneratorInvariantsNoError(bar)
-            self.assertInWithManagerInvariants(mock_a)
-            self.assertInWithGeneratorInvariants(foo)
-        self.assertAfterWithManagerInvariantsNoError(mock_a)
-        self.assertAfterWithGeneratorInvariantsNoError(foo)
-
-
-class NestedNonexceptionalTestCase(unittest.TestCase,
-    ContextmanagerAssertionMixin):
-    def testSingleArgInlineGeneratorSyntax(self):
-        with nested(mock_contextmanager_generator()):
-            pass
-
-    def testSingleArgUnbound(self):
-        mock_contextmanager = mock_contextmanager_generator()
-        mock_nested = MockNested(mock_contextmanager)
-        with mock_nested:
-            self.assertInWithManagerInvariants(mock_contextmanager)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-    def testSingleArgBoundToNonTuple(self):
-        m = mock_contextmanager_generator()
-        # This will bind all the arguments to nested() into a single list
-        # assigned to foo.
-        with nested(m) as foo:
-            self.assertInWithManagerInvariants(m)
-        self.assertAfterWithManagerInvariantsNoError(m)
-
-    def testSingleArgBoundToSingleElementParenthesizedList(self):
-        m = mock_contextmanager_generator()
-        # This will bind all the arguments to nested() into a single list
-        # assigned to foo.
-        # FIXME: what should this do:  with nested(m) as (foo,):
-        with nested(m) as (foo):
-            self.assertInWithManagerInvariants(m)
-        self.assertAfterWithManagerInvariantsNoError(m)
-
-    def testSingleArgBoundToMultipleElementTupleError(self):
-        def shouldThrowValueError():
-            with nested(mock_contextmanager_generator()) as (foo, bar):
-                pass
-        self.assertRaises(ValueError, shouldThrowValueError)
-
-    def testSingleArgUnbound(self):
-        mock_contextmanager = mock_contextmanager_generator()
-        mock_nested = MockNested(mock_contextmanager)
-        with mock_nested:
-            self.assertInWithManagerInvariants(mock_contextmanager)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-    def testMultipleArgUnbound(self):
-        m = mock_contextmanager_generator()
-        n = mock_contextmanager_generator()
-        o = mock_contextmanager_generator()
-        mock_nested = MockNested(m, n, o)
-        with mock_nested:
-            self.assertInWithManagerInvariants(m)
-            self.assertInWithManagerInvariants(n)
-            self.assertInWithManagerInvariants(o)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithManagerInvariantsNoError(m)
-        self.assertAfterWithManagerInvariantsNoError(n)
-        self.assertAfterWithManagerInvariantsNoError(o)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-    def testMultipleArgBound(self):
-        mock_nested = MockNested(mock_contextmanager_generator(),
-            mock_contextmanager_generator(), mock_contextmanager_generator())
-        with mock_nested as (m, n, o):
-            self.assertInWithGeneratorInvariants(m)
-            self.assertInWithGeneratorInvariants(n)
-            self.assertInWithGeneratorInvariants(o)
-            self.assertInWithManagerInvariants(mock_nested)
-        self.assertAfterWithGeneratorInvariantsNoError(m)
-        self.assertAfterWithGeneratorInvariantsNoError(n)
-        self.assertAfterWithGeneratorInvariantsNoError(o)
-        self.assertAfterWithManagerInvariantsNoError(mock_nested)
-
-
-class ExceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):
-    def testSingleResource(self):
-        cm = mock_contextmanager_generator()
-        def shouldThrow():
-            with cm as self.resource:
-                self.assertInWithManagerInvariants(cm)
-                self.assertInWithGeneratorInvariants(self.resource)
-                self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(cm)
-        self.assertAfterWithGeneratorInvariantsWithError(self.resource)
-
-    def testNestedSingleStatements(self):
-        mock_a = mock_contextmanager_generator()
-        mock_b = mock_contextmanager_generator()
-        def shouldThrow():
-            with mock_a as self.foo:
-                with mock_b as self.bar:
-                    self.assertInWithManagerInvariants(mock_a)
-                    self.assertInWithManagerInvariants(mock_b)
-                    self.assertInWithGeneratorInvariants(self.foo)
-                    self.assertInWithGeneratorInvariants(self.bar)
-                    self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(mock_a)
-        self.assertAfterWithManagerInvariantsWithError(mock_b)
-        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
-        self.assertAfterWithGeneratorInvariantsWithError(self.bar)
-
-    def testMultipleResourcesInSingleStatement(self):
-        cm_a = mock_contextmanager_generator()
-        cm_b = mock_contextmanager_generator()
-        mock_nested = MockNested(cm_a, cm_b)
-        def shouldThrow():
-            with mock_nested as (self.resource_a, self.resource_b):
-                self.assertInWithManagerInvariants(cm_a)
-                self.assertInWithManagerInvariants(cm_b)
-                self.assertInWithManagerInvariants(mock_nested)
-                self.assertInWithGeneratorInvariants(self.resource_a)
-                self.assertInWithGeneratorInvariants(self.resource_b)
-                self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(cm_a)
-        self.assertAfterWithManagerInvariantsWithError(cm_b)
-        self.assertAfterWithManagerInvariantsWithError(mock_nested)
-        self.assertAfterWithGeneratorInvariantsWithError(self.resource_a)
-        self.assertAfterWithGeneratorInvariantsWithError(self.resource_b)
-
-    def testNestedExceptionBeforeInnerStatement(self):
-        mock_a = mock_contextmanager_generator()
-        mock_b = mock_contextmanager_generator()
-        self.bar = None
-        def shouldThrow():
-            with mock_a as self.foo:
-                self.assertInWithManagerInvariants(mock_a)
-                self.assertInWithGeneratorInvariants(self.foo)
-                self.raiseTestException()
-                with mock_b as self.bar:
-                    pass
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(mock_a)
-        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
-
-        # The inner statement stuff should never have been touched
-        self.assertEqual(self.bar, None)
-        self.assertFalse(mock_b.context_called)
-        self.assertFalse(mock_b.enter_called)
-        self.assertFalse(mock_b.exit_called)
-        self.assertEqual(mock_b.exit_args, None)
-
-    def testNestedExceptionAfterInnerStatement(self):
-        mock_a = mock_contextmanager_generator()
-        mock_b = mock_contextmanager_generator()
-        def shouldThrow():
-            with mock_a as self.foo:
-                with mock_b as self.bar:
-                    self.assertInWithManagerInvariants(mock_a)
-                    self.assertInWithManagerInvariants(mock_b)
-                    self.assertInWithGeneratorInvariants(self.foo)
-                    self.assertInWithGeneratorInvariants(self.bar)
-                self.raiseTestException()
-        self.assertRaises(RuntimeError, shouldThrow)
-        self.assertAfterWithManagerInvariantsWithError(mock_a)
-        self.assertAfterWithManagerInvariantsNoError(mock_b)
-        self.assertAfterWithGeneratorInvariantsWithError(self.foo)
-        self.assertAfterWithGeneratorInvariantsNoError(self.bar)
-
-
-class NonLocalFlowControlTestCase(unittest.TestCase):
-
-    def testWithBreak(self):
-        counter = 0
-        while True:
-            counter += 1
-            with mock_contextmanager_generator():
-                counter += 10
-                break
-            counter += 100 # Not reached
-        self.assertEqual(counter, 11)
-
-    def testWithContinue(self):
-        counter = 0
-        while True:
-            counter += 1
-            if counter > 2:
-                break
-            with mock_contextmanager_generator():
-                counter += 10
-                continue
-            counter += 100 # Not reached
-        self.assertEqual(counter, 12)
-
-    def testWithReturn(self):
-        def foo():
-            counter = 0
-            while True:
-                counter += 1
-                with mock_contextmanager_generator():
-                    counter += 10
-                    return counter
-                counter += 100 # Not reached
-        self.assertEqual(foo(), 11)
-
-    def testWithYield(self):
-        def gen():
-            with mock_contextmanager_generator():
-                yield 12
-                yield 13
-        x = list(gen())
-        self.assertEqual(x, [12, 13])
-
-    def testWithRaise(self):
-        counter = 0
-        try:
-            counter += 1
-            with mock_contextmanager_generator():
-                counter += 10
-                raise RuntimeError
-            counter += 100 # Not reached
-        except RuntimeError:
-            self.assertEqual(counter, 11)
-        else:
-            self.fail("Didn't raise RuntimeError")
-
-
-class AssignmentTargetTestCase(unittest.TestCase):
-
-    def testSingleComplexTarget(self):
-        targets = {1: [0, 1, 2]}
-        with mock_contextmanager_generator() as targets[1][0]:
-            self.assertEqual(targets.keys(), [1])
-            self.assertEqual(targets[1][0].__class__, MockResource)
-        with mock_contextmanager_generator() as targets.values()[0][1]:
-            self.assertEqual(targets.keys(), [1])
-            self.assertEqual(targets[1][1].__class__, MockResource)
-        with mock_contextmanager_generator() as targets[2]:
-            keys = targets.keys()
-            keys.sort()
-            self.assertEqual(keys, [1, 2])
-        class C: pass
-        blah = C()
-        with mock_contextmanager_generator() as blah.foo:
-            self.assertEqual(hasattr(blah, "foo"), True)
-
-    def testMultipleComplexTargets(self):
-        class C:
-            def __context__(self): return self
-            def __enter__(self): return 1, 2, 3
-            def __exit__(self, *a): pass
-        targets = {1: [0, 1, 2]}
-        with C() as (targets[1][0], targets[1][1], targets[1][2]):
-            self.assertEqual(targets, {1: [1, 2, 3]})
-        with C() as (targets.values()[0][2], targets.values()[0][1], targets.values()[0][0]):
-            self.assertEqual(targets, {1: [3, 2, 1]})
-        with C() as (targets[1], targets[2], targets[3]):
-            self.assertEqual(targets, {1: 1, 2: 2, 3: 3})
-        class B: pass
-        blah = B()
-        with C() as (blah.one, blah.two, blah.three):
-            self.assertEqual(blah.one, 1)
-            self.assertEqual(blah.two, 2)
-            self.assertEqual(blah.three, 3)
-
-
-def test_main():
-    run_unittest(FailureTestCase, NonexceptionalTestCase,
-                 NestedNonexceptionalTestCase, ExceptionalTestCase,
-                 NonLocalFlowControlTestCase,
-                 AssignmentTargetTestCase)
-
-
-if __name__ == '__main__':
-    test_main()
+#!/usr/bin/env python

+

+"""Unit tests for the with statement specified in PEP 343."""

+

+__author__ = "Mike Bland"

+__email__ = "mbland at acm dot org"

+

+import unittest

+from test.contextmanager import GeneratorContextManager

+from test.nested import nested

+from test.test_support import run_unittest

+

+

+class MockContextManager(GeneratorContextManager):

+    def __init__(self, gen):

+        GeneratorContextManager.__init__(self, gen)

+        self.context_called = False

+        self.enter_called = False

+        self.exit_called = False

+        self.exit_args = None

+

+    def __context__(self):

+        self.context_called = True

+        return GeneratorContextManager.__context__(self)

+

+    def __enter__(self):

+        self.enter_called = True

+        return GeneratorContextManager.__enter__(self)

+

+    def __exit__(self, type, value, traceback):

+        self.exit_called = True

+        self.exit_args = (type, value, traceback)

+        return GeneratorContextManager.__exit__(self, type, value, traceback)

+

+

+def mock_contextmanager(func):

+    def helper(*args, **kwds):

+        return MockContextManager(func(*args, **kwds))

+    return helper

+

+

+class MockResource(object):

+    def __init__(self):

+        self.yielded = False

+        self.stopped = False

+

+

+@mock_contextmanager

+def mock_contextmanager_generator():

+    mock = MockResource()

+    try:

+        mock.yielded = True

+        yield mock

+    finally:

+        mock.stopped = True

+

+

+class MockNested(nested):

+    def __init__(self, *contexts):

+        nested.__init__(self, *contexts)

+        self.context_called = False

+        self.enter_called = False

+        self.exit_called = False

+        self.exit_args = None

+

+    def __context__(self):

+        self.context_called = True

+        return nested.__context__(self)

+

+    def __enter__(self):

+        self.enter_called = True

+        return nested.__enter__(self)

+

+    def __exit__(self, *exc_info):

+        self.exit_called = True

+        self.exit_args = exc_info

+        return nested.__exit__(self, *exc_info)

+

+

+class FailureTestCase(unittest.TestCase):

+    def testNameError(self):

+        def fooNotDeclared():

+            with foo: pass

+        self.assertRaises(NameError, fooNotDeclared)

+

+    def testContextAttributeError(self):

+        class LacksContext(object):

+            def __enter__(self):

+                pass

+

+            def __exit__(self, type, value, traceback):

+                pass

+

+        def fooLacksContext():

+            foo = LacksContext()

+            with foo: pass

+        self.assertRaises(AttributeError, fooLacksContext)

+

+    def testEnterAttributeError(self):

+        class LacksEnter(object):

+            def __context__(self):

+                pass

+

+            def __exit__(self, type, value, traceback):

+                pass

+

+        def fooLacksEnter():

+            foo = LacksEnter()

+            with foo: pass

+        self.assertRaises(AttributeError, fooLacksEnter)

+

+    def testExitAttributeError(self):

+        class LacksExit(object):

+            def __context__(self):

+                pass

+

+            def __enter__(self):

+                pass

+

+        def fooLacksExit():

+            foo = LacksExit()

+            with foo: pass

+        self.assertRaises(AttributeError, fooLacksExit)

+

+    def assertRaisesSyntaxError(self, codestr):

+        def shouldRaiseSyntaxError(s):

+            compile(s, '', 'single')

+        self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr)

+

+    def testAssignmentToNoneError(self):

+        self.assertRaisesSyntaxError('with mock as None:\n  pass')

+        self.assertRaisesSyntaxError(

+            'with mock as (None):\n'

+            '  pass')

+

+    def testAssignmentToEmptyTupleError(self):

+        self.assertRaisesSyntaxError(

+            'with mock as ():\n'

+            '  pass')

+

+    def testAssignmentToTupleOnlyContainingNoneError(self):

+        self.assertRaisesSyntaxError('with mock as None,:\n  pass')

+        self.assertRaisesSyntaxError(

+            'with mock as (None,):\n'

+            '  pass')

+

+    def testAssignmentToTupleContainingNoneError(self):

+        self.assertRaisesSyntaxError(

+            'with mock as (foo, None, bar):\n'

+            '  pass')

+

+    def testContextThrows(self):

+        class ContextThrows(object):

+            def __context__(self):

+                raise RuntimeError("Context threw")

+

+        def shouldThrow():

+            ct = ContextThrows()

+            self.foo = None

+            with ct as self.foo:

+                pass

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertEqual(self.foo, None)

+

+    def testEnterThrows(self):

+        class EnterThrows(object):

+            def __context__(self):

+                return self

+

+            def __enter__(self):

+                raise RuntimeError("Context threw")

+

+            def __exit__(self, *args):

+                pass

+

+        def shouldThrow():

+            ct = EnterThrows()

+            self.foo = None

+            with ct as self.foo:

+                pass

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertEqual(self.foo, None)

+

+    def testExitThrows(self):

+        class ExitThrows(object):

+            def __context__(self):

+                return self

+            def __enter__(self):

+                return

+            def __exit__(self, *args):

+                raise RuntimeError(42)

+        def shouldThrow():

+            with ExitThrows():

+                pass

+        self.assertRaises(RuntimeError, shouldThrow)

+

+class ContextmanagerAssertionMixin(object):

+    TEST_EXCEPTION = RuntimeError("test exception")

+

+    def assertInWithManagerInvariants(self, mock_manager):

+        self.assertTrue(mock_manager.context_called)

+        self.assertTrue(mock_manager.enter_called)

+        self.assertFalse(mock_manager.exit_called)

+        self.assertEqual(mock_manager.exit_args, None)

+

+    def assertAfterWithManagerInvariants(self, mock_manager, exit_args):

+        self.assertTrue(mock_manager.context_called)

+        self.assertTrue(mock_manager.enter_called)

+        self.assertTrue(mock_manager.exit_called)

+        self.assertEqual(mock_manager.exit_args, exit_args)

+

+    def assertAfterWithManagerInvariantsNoError(self, mock_manager):

+        self.assertAfterWithManagerInvariants(mock_manager,

+            (None, None, None))

+

+    def assertInWithGeneratorInvariants(self, mock_generator):

+        self.assertTrue(mock_generator.yielded)

+        self.assertFalse(mock_generator.stopped)

+

+    def assertAfterWithGeneratorInvariantsNoError(self, mock_generator):

+        self.assertTrue(mock_generator.yielded)

+        self.assertTrue(mock_generator.stopped)

+

+    def raiseTestException(self):

+        raise self.TEST_EXCEPTION

+

+    def assertAfterWithManagerInvariantsWithError(self, mock_manager):

+        self.assertTrue(mock_manager.context_called)

+        self.assertTrue(mock_manager.enter_called)

+        self.assertTrue(mock_manager.exit_called)

+        self.assertEqual(mock_manager.exit_args[0], RuntimeError)

+        self.assertEqual(mock_manager.exit_args[1], self.TEST_EXCEPTION)

+

+    def assertAfterWithGeneratorInvariantsWithError(self, mock_generator):

+        self.assertTrue(mock_generator.yielded)

+        self.assertTrue(mock_generator.stopped)

+

+

+class NonexceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):

+    def testInlineGeneratorSyntax(self):

+        with mock_contextmanager_generator():

+            pass

+

+    def testUnboundGenerator(self):

+        mock = mock_contextmanager_generator()

+        with mock:

+            pass

+        self.assertAfterWithManagerInvariantsNoError(mock)

+

+    def testInlineGeneratorBoundSyntax(self):

+        with mock_contextmanager_generator() as foo:

+            self.assertInWithGeneratorInvariants(foo)

+        # FIXME: In the future, we'll try to keep the bound names from leaking

+        self.assertAfterWithGeneratorInvariantsNoError(foo)

+

+    def testInlineGeneratorBoundToExistingVariable(self):

+        foo = None

+        with mock_contextmanager_generator() as foo:

+            self.assertInWithGeneratorInvariants(foo)

+        self.assertAfterWithGeneratorInvariantsNoError(foo)

+

+    def testInlineGeneratorBoundToDottedVariable(self):

+        with mock_contextmanager_generator() as self.foo:

+            self.assertInWithGeneratorInvariants(self.foo)

+        self.assertAfterWithGeneratorInvariantsNoError(self.foo)

+

+    def testBoundGenerator(self):

+        mock = mock_contextmanager_generator()

+        with mock as foo:

+            self.assertInWithGeneratorInvariants(foo)

+            self.assertInWithManagerInvariants(mock)

+        self.assertAfterWithGeneratorInvariantsNoError(foo)

+        self.assertAfterWithManagerInvariantsNoError(mock)

+

+    def testNestedSingleStatements(self):

+        mock_a = mock_contextmanager_generator()

+        with mock_a as foo:

+            mock_b = mock_contextmanager_generator()

+            with mock_b as bar:

+                self.assertInWithManagerInvariants(mock_a)

+                self.assertInWithManagerInvariants(mock_b)

+                self.assertInWithGeneratorInvariants(foo)

+                self.assertInWithGeneratorInvariants(bar)

+            self.assertAfterWithManagerInvariantsNoError(mock_b)

+            self.assertAfterWithGeneratorInvariantsNoError(bar)

+            self.assertInWithManagerInvariants(mock_a)

+            self.assertInWithGeneratorInvariants(foo)

+        self.assertAfterWithManagerInvariantsNoError(mock_a)

+        self.assertAfterWithGeneratorInvariantsNoError(foo)

+

+

+class NestedNonexceptionalTestCase(unittest.TestCase,

+    ContextmanagerAssertionMixin):

+    def testSingleArgInlineGeneratorSyntax(self):

+        with nested(mock_contextmanager_generator()):

+            pass

+

+    def testSingleArgUnbound(self):

+        mock_contextmanager = mock_contextmanager_generator()

+        mock_nested = MockNested(mock_contextmanager)

+        with mock_nested:

+            self.assertInWithManagerInvariants(mock_contextmanager)

+            self.assertInWithManagerInvariants(mock_nested)

+        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)

+        self.assertAfterWithManagerInvariantsNoError(mock_nested)

+

+    def testSingleArgBoundToNonTuple(self):

+        m = mock_contextmanager_generator()

+        # This will bind all the arguments to nested() into a single list

+        # assigned to foo.

+        with nested(m) as foo:

+            self.assertInWithManagerInvariants(m)

+        self.assertAfterWithManagerInvariantsNoError(m)

+

+    def testSingleArgBoundToSingleElementParenthesizedList(self):

+        m = mock_contextmanager_generator()

+        # This will bind all the arguments to nested() into a single list

+        # assigned to foo.

+        # FIXME: what should this do:  with nested(m) as (foo,):

+        with nested(m) as (foo):

+            self.assertInWithManagerInvariants(m)

+        self.assertAfterWithManagerInvariantsNoError(m)

+

+    def testSingleArgBoundToMultipleElementTupleError(self):

+        def shouldThrowValueError():

+            with nested(mock_contextmanager_generator()) as (foo, bar):

+                pass

+        self.assertRaises(ValueError, shouldThrowValueError)

+

+    def testSingleArgUnbound(self):

+        mock_contextmanager = mock_contextmanager_generator()

+        mock_nested = MockNested(mock_contextmanager)

+        with mock_nested:

+            self.assertInWithManagerInvariants(mock_contextmanager)

+            self.assertInWithManagerInvariants(mock_nested)

+        self.assertAfterWithManagerInvariantsNoError(mock_contextmanager)

+        self.assertAfterWithManagerInvariantsNoError(mock_nested)

+

+    def testMultipleArgUnbound(self):

+        m = mock_contextmanager_generator()

+        n = mock_contextmanager_generator()

+        o = mock_contextmanager_generator()

+        mock_nested = MockNested(m, n, o)

+        with mock_nested:

+            self.assertInWithManagerInvariants(m)

+            self.assertInWithManagerInvariants(n)

+            self.assertInWithManagerInvariants(o)

+            self.assertInWithManagerInvariants(mock_nested)

+        self.assertAfterWithManagerInvariantsNoError(m)

+        self.assertAfterWithManagerInvariantsNoError(n)

+        self.assertAfterWithManagerInvariantsNoError(o)

+        self.assertAfterWithManagerInvariantsNoError(mock_nested)

+

+    def testMultipleArgBound(self):

+        mock_nested = MockNested(mock_contextmanager_generator(),

+            mock_contextmanager_generator(), mock_contextmanager_generator())

+        with mock_nested as (m, n, o):

+            self.assertInWithGeneratorInvariants(m)

+            self.assertInWithGeneratorInvariants(n)

+            self.assertInWithGeneratorInvariants(o)

+            self.assertInWithManagerInvariants(mock_nested)

+        self.assertAfterWithGeneratorInvariantsNoError(m)

+        self.assertAfterWithGeneratorInvariantsNoError(n)

+        self.assertAfterWithGeneratorInvariantsNoError(o)

+        self.assertAfterWithManagerInvariantsNoError(mock_nested)

+

+

+class ExceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin):

+    def testSingleResource(self):

+        cm = mock_contextmanager_generator()

+        def shouldThrow():

+            with cm as self.resource:

+                self.assertInWithManagerInvariants(cm)

+                self.assertInWithGeneratorInvariants(self.resource)

+                self.raiseTestException()

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertAfterWithManagerInvariantsWithError(cm)

+        self.assertAfterWithGeneratorInvariantsWithError(self.resource)

+

+    def testNestedSingleStatements(self):

+        mock_a = mock_contextmanager_generator()

+        mock_b = mock_contextmanager_generator()

+        def shouldThrow():

+            with mock_a as self.foo:

+                with mock_b as self.bar:

+                    self.assertInWithManagerInvariants(mock_a)

+                    self.assertInWithManagerInvariants(mock_b)

+                    self.assertInWithGeneratorInvariants(self.foo)

+                    self.assertInWithGeneratorInvariants(self.bar)

+                    self.raiseTestException()

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertAfterWithManagerInvariantsWithError(mock_a)

+        self.assertAfterWithManagerInvariantsWithError(mock_b)

+        self.assertAfterWithGeneratorInvariantsWithError(self.foo)

+        self.assertAfterWithGeneratorInvariantsWithError(self.bar)

+

+    def testMultipleResourcesInSingleStatement(self):

+        cm_a = mock_contextmanager_generator()

+        cm_b = mock_contextmanager_generator()

+        mock_nested = MockNested(cm_a, cm_b)

+        def shouldThrow():

+            with mock_nested as (self.resource_a, self.resource_b):

+                self.assertInWithManagerInvariants(cm_a)

+                self.assertInWithManagerInvariants(cm_b)

+                self.assertInWithManagerInvariants(mock_nested)

+                self.assertInWithGeneratorInvariants(self.resource_a)

+                self.assertInWithGeneratorInvariants(self.resource_b)

+                self.raiseTestException()

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertAfterWithManagerInvariantsWithError(cm_a)

+        self.assertAfterWithManagerInvariantsWithError(cm_b)

+        self.assertAfterWithManagerInvariantsWithError(mock_nested)

+        self.assertAfterWithGeneratorInvariantsWithError(self.resource_a)

+        self.assertAfterWithGeneratorInvariantsWithError(self.resource_b)

+

+    def testNestedExceptionBeforeInnerStatement(self):

+        mock_a = mock_contextmanager_generator()

+        mock_b = mock_contextmanager_generator()

+        self.bar = None

+        def shouldThrow():

+            with mock_a as self.foo:

+                self.assertInWithManagerInvariants(mock_a)

+                self.assertInWithGeneratorInvariants(self.foo)

+                self.raiseTestException()

+                with mock_b as self.bar:

+                    pass

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertAfterWithManagerInvariantsWithError(mock_a)

+        self.assertAfterWithGeneratorInvariantsWithError(self.foo)

+

+        # The inner statement stuff should never have been touched

+        self.assertEqual(self.bar, None)

+        self.assertFalse(mock_b.context_called)

+        self.assertFalse(mock_b.enter_called)

+        self.assertFalse(mock_b.exit_called)

+        self.assertEqual(mock_b.exit_args, None)

+

+    def testNestedExceptionAfterInnerStatement(self):

+        mock_a = mock_contextmanager_generator()

+        mock_b = mock_contextmanager_generator()

+        def shouldThrow():

+            with mock_a as self.foo:

+                with mock_b as self.bar:

+                    self.assertInWithManagerInvariants(mock_a)

+                    self.assertInWithManagerInvariants(mock_b)

+                    self.assertInWithGeneratorInvariants(self.foo)

+                    self.assertInWithGeneratorInvariants(self.bar)

+                self.raiseTestException()

+        self.assertRaises(RuntimeError, shouldThrow)

+        self.assertAfterWithManagerInvariantsWithError(mock_a)

+        self.assertAfterWithManagerInvariantsNoError(mock_b)

+        self.assertAfterWithGeneratorInvariantsWithError(self.foo)

+        self.assertAfterWithGeneratorInvariantsNoError(self.bar)

+

+

+class NonLocalFlowControlTestCase(unittest.TestCase):

+

+    def testWithBreak(self):

+        counter = 0

+        while True:

+            counter += 1

+            with mock_contextmanager_generator():

+                counter += 10

+                break

+            counter += 100 # Not reached

+        self.assertEqual(counter, 11)

+

+    def testWithContinue(self):

+        counter = 0

+        while True:

+            counter += 1

+            if counter > 2:

+                break

+            with mock_contextmanager_generator():

+                counter += 10

+                continue

+            counter += 100 # Not reached

+        self.assertEqual(counter, 12)

+

+    def testWithReturn(self):

+        def foo():

+            counter = 0

+            while True:

+                counter += 1

+                with mock_contextmanager_generator():

+                    counter += 10

+                    return counter

+                counter += 100 # Not reached

+        self.assertEqual(foo(), 11)

+

+    def testWithYield(self):

+        def gen():

+            with mock_contextmanager_generator():

+                yield 12

+                yield 13

+        x = list(gen())

+        self.assertEqual(x, [12, 13])

+

+    def testWithRaise(self):

+        counter = 0

+        try:

+            counter += 1

+            with mock_contextmanager_generator():

+                counter += 10

+                raise RuntimeError

+            counter += 100 # Not reached

+        except RuntimeError:

+            self.assertEqual(counter, 11)

+        else:

+            self.fail("Didn't raise RuntimeError")

+

+

+class AssignmentTargetTestCase(unittest.TestCase):

+

+    def testSingleComplexTarget(self):

+        targets = {1: [0, 1, 2]}

+        with mock_contextmanager_generator() as targets[1][0]:

+            self.assertEqual(targets.keys(), [1])

+            self.assertEqual(targets[1][0].__class__, MockResource)

+        with mock_contextmanager_generator() as targets.values()[0][1]:

+            self.assertEqual(targets.keys(), [1])

+            self.assertEqual(targets[1][1].__class__, MockResource)

+        with mock_contextmanager_generator() as targets[2]:

+            keys = targets.keys()

+            keys.sort()

+            self.assertEqual(keys, [1, 2])

+        class C: pass

+        blah = C()

+        with mock_contextmanager_generator() as blah.foo:

+            self.assertEqual(hasattr(blah, "foo"), True)

+

+    def testMultipleComplexTargets(self):

+        class C:

+            def __context__(self): return self

+            def __enter__(self): return 1, 2, 3

+            def __exit__(self, *a): pass

+        targets = {1: [0, 1, 2]}

+        with C() as (targets[1][0], targets[1][1], targets[1][2]):

+            self.assertEqual(targets, {1: [1, 2, 3]})

+        with C() as (targets.values()[0][2], targets.values()[0][1], targets.values()[0][0]):

+            self.assertEqual(targets, {1: [3, 2, 1]})

+        with C() as (targets[1], targets[2], targets[3]):

+            self.assertEqual(targets, {1: 1, 2: 2, 3: 3})

+        class B: pass

+        blah = B()

+        with C() as (blah.one, blah.two, blah.three):

+            self.assertEqual(blah.one, 1)

+            self.assertEqual(blah.two, 2)

+            self.assertEqual(blah.three, 3)

+

+

+def test_main():

+    run_unittest(FailureTestCase, NonexceptionalTestCase,

+                 NestedNonexceptionalTestCase, ExceptionalTestCase,

+                 NonLocalFlowControlTestCase,

+                 AssignmentTargetTestCase)

+

+

+if __name__ == '__main__':

+    test_main()