def test_handles_empty_generators(self):
def function_calling_empty_generator():
def generator(x):
if False:
yield 'something'
[x for x in generator(123)]
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function_calling_empty_generator, execution)
assert_function_with_single_generator_object("generator", {'x': 123}, [], execution)
def test_handles_empty_generators(self):
def function_calling_empty_generator():
def generator(x):
if False:
yield 'something'
[x for x in generator(123)]
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function_calling_empty_generator, execution)
assert_function_with_single_generator_object("generator", {'x': 123}, [], execution)
def test_handles_generator_objects_that_werent_destroyed(self):
def function():
def generator():
yield 1
g = generator()
g.next()
globals()['__generator_yielding_one'] = g
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function, execution)
assert_function_with_single_generator_object("generator", {}, [1], execution)
def test_handles_generator_objects_that_werent_destroyed(self):
def function():
def generator():
yield 1
g = generator()
g.next()
globals()['__generator_yielding_one'] = g
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function, execution)
assert_function_with_single_generator_object("generator", {}, [1], execution)
def inspect_returning_callables_and_execution(fun, ignored_functions=None):
project = ProjectMock(ignored_functions or [])
execution = Execution(project=project)
try:
inspect_code_in_context(fun, execution)
# Don't allow any POEs exceptions to propagate to the testing code.
# Catch both string and normal exceptions.
except:
print "Caught exception inside point of entry:", last_exception_as_string()
print last_traceback()
return project.get_callables(), execution
def inspect_returning_callables_and_execution(fun, ignored_functions=None):
project = ProjectMock(ignored_functions or [])
execution = Execution(project=project)
try:
inspect_code_in_context(fun, execution)
# Don't allow any POEs exceptions to propagate to the testing code.
# Catch both string and normal exceptions.
except:
print("Caught exception inside point of entry:", last_exception_as_string())
print(last_traceback())
return project.get_callables(), execution
def test_handles_single_yielded_value(self):
def yields_one():
def generator():
yield 1
g = generator()
g.next()
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(yields_one, execution)
generator = execution.project.find_object(Function, "generator")
gobject = assert_one_element_and_return(generator.calls)
assert_generator_object({}, [1], gobject)
def test_handles_single_yielded_value(self):
def yields_one():
def generator():
yield 1
g = generator()
g.next()
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(yields_one, execution)
generator = execution.project.find_object(Function, "generator")
gobject = assert_one_element_and_return(generator.calls)
assert_generator_object({}, [1], gobject)
def test_handles_generator_objects_that_yield_none_and_dont_get_destroyed(self):
if hasattr(generator_has_ended, 'unreliable'):
raise SkipTest
def function():
def generator():
yield None
g = generator()
g.next()
globals()['__generator_yielding_none'] = g
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function, execution)
assert_function_with_single_generator_object("generator", {}, [None], execution)
def test_handles_generator_objects_that_yield_none_and_dont_get_destroyed(self):
if hasattr(generator_has_ended, 'unreliable'):
raise SkipTest
def function():
def generator():
yield None
g = generator()
g.next()
globals()['__generator_yielding_none'] = g
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function, execution)
assert_function_with_single_generator_object("generator", {}, [None], execution)
def test_handles_yielded_values(self):
def function_calling_generator():
def generator(x):
yield x
yield x + 1
yield x * 2
yield x ** 3
[x for x in generator(2)]
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function_calling_generator, execution)
generator = execution.project.find_object(Function, "generator")
gobject = assert_one_element_and_return(generator.calls)
assert_generator_object({'x': 2}, [2, 3, 4, 8], gobject)
def test_handles_yielded_values(self):
def function_calling_generator():
def generator(x):
yield x
yield x + 1
yield x * 2
yield x ** 3
[x for x in generator(2)]
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function_calling_generator, execution)
generator = execution.project.find_object(Function, "generator")
gobject = assert_one_element_and_return(generator.calls)
assert_generator_object({'x': 2}, [2, 3, 4, 8], gobject)
def test_handles_yielded_nones(self):
if hasattr(generator_has_ended, 'unreliable'):
raise SkipTest
def yields_none():
def generator():
yield None
g = generator()
g.next()
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(yields_none, execution)
generator = execution.project.find_object(Function, "generator")
gobject = assert_one_element_and_return(generator.calls)
assert_generator_object({}, [None], gobject)
def test_handles_yielded_nones(self):
if hasattr(generator_has_ended, 'unreliable'):
raise SkipTest
def yields_none():
def generator():
yield None
g = generator()
g.next()
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(yields_none, execution)
generator = execution.project.find_object(Function, "generator")
gobject = assert_one_element_and_return(generator.calls)
assert_generator_object({}, [None], gobject)
def test_handles_generators_called_not_from_top_level(self):
def function_calling_function_that_uses_generator():
def generator(x):
yield x
yield x + 1
yield x * 2
yield x ** 3
def function(y):
return [x for x in generator(y)]
function(2)
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("generator", is_generator=True))\
.with_object(Function("function"))\
.make_new_execution()
inspect_code_in_context(function_calling_function_that_uses_generator, execution)
assert_function_with_single_generator_object("generator",
{'x': 2}, [2, 3, 4, 8], execution)
def test_handles_generators_called_not_from_top_level(self):
def function_calling_function_that_uses_generator():
def generator(x):
yield x
yield x + 1
yield x * 2
yield x ** 3
def function(y):
return [x for x in generator(y)]
function(2)
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("generator", is_generator=True))\
.with_object(Function("function"))\
.make_new_execution()
inspect_code_in_context(function_calling_function_that_uses_generator, execution)
assert_function_with_single_generator_object("generator",
{'x': 2}, [2, 3, 4, 8], execution)
def test_handles_generator_methods(self):
def function_calling_generator_method():
class GenClass(object):
def genmeth(self):
yield 0
yield 1
yield 0
[x for x in GenClass().genmeth()]
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Class("GenClass", methods=[Method("genmeth", is_generator=True)]))\
.make_new_execution()
inspect_code_in_context(function_calling_generator_method, execution)
klass = execution.project.find_object(Class, "GenClass")
user_object = assert_one_element_and_return(klass.user_objects)
assert_instance(user_object, UserObject)
gobject = assert_one_element_and_return(user_object.calls)
assert_generator_object({}, [0, 1, 0], gobject)
def test_handles_generator_methods(self):
def function_calling_generator_method():
class GenClass(object):
def genmeth(self):
yield 0
yield 1
yield 0
[x for x in GenClass().genmeth()]
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Class("GenClass", methods=[Method("genmeth", is_generator=True)]))\
.make_new_execution()
inspect_code_in_context(function_calling_generator_method, execution)
klass = execution.project.find_object(Class, "GenClass")
user_object = assert_one_element_and_return(klass.user_objects)
assert_instance(user_object, UserObject)
gobject = assert_one_element_and_return(user_object.calls)
assert_generator_object({}, [0, 1, 0], gobject)
def test_generator_can_be_invoked_in_multiple_places(self):
def function():
def generator():
i = 1
while True:
yield i
i += 1
def first(g):
return g.next()
def second(g):
return g.next() + g.next()
g = generator()
g.next()
first(g)
second(g)
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("generator", is_generator=True))\
.with_object(Function("first"))\
.with_object(Function("second"))\
.make_new_execution()
inspect_code_in_context(function, execution)
expected_call_graph = noindent("""
generator()
first()
next()
generator()
second()
next()
generator()
next()
generator()
""")
assert_equal_strings(expected_call_graph,
call_graph_as_string(execution.call_graph))
def test_generator_can_be_invoked_multiple_times_at_the_same_place(self):
def function():
def sth_else():
return False
def generator():
yield 1
yield 2
g = generator()
g.next()
sth_else()
g.next()
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("generator", is_generator=True))\
.with_object(Function("sth_else"))\
.make_new_execution()
inspect_code_in_context(function, execution)
assert_instance(execution.call_graph[0], GeneratorObjectInvocation)
assert_instance(execution.call_graph[1], FunctionCall)
assert_instance(execution.call_graph[2], GeneratorObjectInvocation)
def test_distinguishes_between_generator_objects_spawned_with_the_same_generator(self):
def function():
def generator():
yield 1
yield 2
[x for x in generator()]
[x for x in generator()]
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function, execution)
generator = execution.project.find_object(Function, "generator")
assert_length(generator.calls, 2)
assert_length(execution.call_graph, 4)
gcall1 = generator.calls[0]
assert gcall1.calls[0] is execution.call_graph[0]
assert gcall1.calls[1] is execution.call_graph[1]
gcall2 = generator.calls[1]
assert gcall2.calls[0] is execution.call_graph[2]
assert gcall2.calls[1] is execution.call_graph[3]
def test_generator_can_be_invoked_multiple_times_at_the_same_place(self):
def function():
def sth_else():
return False
def generator():
yield 1
yield 2
g = generator()
g.next()
sth_else()
g.next()
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("generator", is_generator=True))\
.with_object(Function("sth_else"))\
.make_new_execution()
inspect_code_in_context(function, execution)
assert_instance(execution.call_graph[0], GeneratorObjectInvocation)
assert_instance(execution.call_graph[1], FunctionCall)
assert_instance(execution.call_graph[2], GeneratorObjectInvocation)
def test_serializes_generator_objects_passed_as_values(self):
def function():
def invoke(g):
return [x for x in g]
def generator():
yield 1
yield 2
invoke(generator())
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("invoke"))\
.with_object(Function("generator", is_generator=True))\
.make_new_execution()
inspect_code_in_context(function, execution)
function = execution.project.find_object(Function, "invoke")
fcall = assert_one_element_and_return(function.calls)
gobject = fcall.input['g']
assert_instance(gobject, GeneratorObject)
assert_generator_object({}, [1, 2], gobject)
def test_serializes_generator_objects_passed_as_values(self):
def function():
def invoke(g):
return [x for x in g]
def generator():
yield 1
yield 2
invoke(generator())
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("invoke"))\
.with_object(Function("generator", is_generator=True))\
.make_new_execution()
inspect_code_in_context(function, execution)
function = execution.project.find_object(Function, "invoke")
fcall = assert_one_element_and_return(function.calls)
gobject = fcall.input['g']
assert_instance(gobject, GeneratorObject)
assert_generator_object({}, [1, 2], gobject)
def test_distinguishes_between_generator_objects_spawned_with_the_same_generator(self):
def function():
def generator():
yield 1
yield 2
[x for x in generator()]
[x for x in generator()]
execution = make_execution_with_single_generator_function("generator")
inspect_code_in_context(function, execution)
generator = execution.project.find_object(Function, "generator")
assert_length(generator.calls, 2)
assert_length(execution.call_graph, 4)
gcall1 = generator.calls[0]
assert gcall1.calls[0] is execution.call_graph[0]
assert gcall1.calls[1] is execution.call_graph[1]
gcall2 = generator.calls[1]
assert gcall2.calls[0] is execution.call_graph[2]
assert gcall2.calls[1] is execution.call_graph[3]
def test_generator_can_be_invoked_in_multiple_places(self):
def function():
def generator():
i = 1
while True:
yield i
i += 1
def first(g):
return g.next()
def second(g):
return g.next() + g.next()
g = generator()
g.next()
first(g)
second(g)
execution = TestingProject()\
.with_all_catch_module()\
.with_object(Function("generator", is_generator=True))\
.with_object(Function("first"))\
.with_object(Function("second"))\
.make_new_execution()
inspect_code_in_context(function, execution)
expected_call_graph = noindent("""
generator()
first()
next()
generator()
second()
next()
generator()
next()
generator()
""")
assert_equal_strings(expected_call_graph,
call_graph_as_string(execution.call_graph))