lib-python.2.7.test.test_sys_setprofile.py Maven / Gradle / Ivy
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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
import gc
import pprint
import sys
import unittest
from test import test_support
class TestGetProfile(unittest.TestCase):
def setUp(self):
sys.setprofile(None)
def tearDown(self):
sys.setprofile(None)
def test_empty(self):
self.assertIsNone(sys.getprofile())
def test_setget(self):
def fn(*args):
pass
sys.setprofile(fn)
self.assertIs(sys.getprofile(), fn)
class HookWatcher:
def __init__(self):
self.frames = []
self.events = []
def callback(self, frame, event, arg):
if (event == "call"
or event == "return"
or event == "exception"):
self.add_event(event, frame)
def add_event(self, event, frame=None):
"""Add an event to the log."""
if frame is None:
frame = sys._getframe(1)
try:
frameno = self.frames.index(frame)
except ValueError:
frameno = len(self.frames)
self.frames.append(frame)
self.events.append((frameno, event, ident(frame)))
def get_events(self):
"""Remove calls to add_event()."""
disallowed = [ident(self.add_event.im_func), ident(ident)]
self.frames = None
return [item for item in self.events if item[2] not in disallowed]
class ProfileSimulator(HookWatcher):
def __init__(self, testcase):
self.testcase = testcase
self.stack = []
HookWatcher.__init__(self)
def callback(self, frame, event, arg):
# Callback registered with sys.setprofile()/sys.settrace()
self.dispatch[event](self, frame)
def trace_call(self, frame):
self.add_event('call', frame)
self.stack.append(frame)
def trace_return(self, frame):
self.add_event('return', frame)
self.stack.pop()
def trace_exception(self, frame):
self.testcase.fail(
"the profiler should never receive exception events")
def trace_pass(self, frame):
pass
dispatch = {
'call': trace_call,
'exception': trace_exception,
'return': trace_return,
'c_call': trace_pass,
'c_return': trace_pass,
'c_exception': trace_pass,
}
class TestCaseBase(unittest.TestCase):
def check_events(self, callable, expected):
events = capture_events(callable, self.new_watcher())
if events != expected:
self.fail("Expected events:\n%s\nReceived events:\n%s"
% (pprint.pformat(expected), pprint.pformat(events)))
class ProfileHookTestCase(TestCaseBase):
def new_watcher(self):
return HookWatcher()
def test_simple(self):
def f(p):
pass
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_exception(self):
def f(p):
1./0
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_caught_exception(self):
def f(p):
try: 1./0
except: pass
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_caught_nested_exception(self):
def f(p):
try: 1./0
except: pass
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_nested_exception(self):
def f(p):
1./0
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
# This isn't what I expected:
# (0, 'exception', protect_ident),
# I expected this again:
(1, 'return', f_ident),
])
def test_exception_in_except_clause(self):
def f(p):
1./0
def g(p):
try:
f(p)
except:
try: f(p)
except: pass
f_ident = ident(f)
g_ident = ident(g)
self.check_events(g, [(1, 'call', g_ident),
(2, 'call', f_ident),
(2, 'return', f_ident),
(3, 'call', f_ident),
(3, 'return', f_ident),
(1, 'return', g_ident),
])
def test_exception_propogation(self):
def f(p):
1./0
def g(p):
try: f(p)
finally: p.add_event("falling through")
f_ident = ident(f)
g_ident = ident(g)
self.check_events(g, [(1, 'call', g_ident),
(2, 'call', f_ident),
(2, 'return', f_ident),
(1, 'falling through', g_ident),
(1, 'return', g_ident),
])
def test_raise_twice(self):
def f(p):
try: 1./0
except: 1./0
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_raise_reraise(self):
def f(p):
try: 1./0
except: raise
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_raise(self):
def f(p):
raise Exception()
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_distant_exception(self):
def f():
1./0
def g():
f()
def h():
g()
def i():
h()
def j(p):
i()
f_ident = ident(f)
g_ident = ident(g)
h_ident = ident(h)
i_ident = ident(i)
j_ident = ident(j)
self.check_events(j, [(1, 'call', j_ident),
(2, 'call', i_ident),
(3, 'call', h_ident),
(4, 'call', g_ident),
(5, 'call', f_ident),
(5, 'return', f_ident),
(4, 'return', g_ident),
(3, 'return', h_ident),
(2, 'return', i_ident),
(1, 'return', j_ident),
])
def test_generator(self):
def f():
for i in range(2):
yield i
def g(p):
for i in f():
pass
f_ident = ident(f)
g_ident = ident(g)
self.check_events(g, [(1, 'call', g_ident),
# call the iterator twice to generate values
(2, 'call', f_ident),
(2, 'return', f_ident),
(2, 'call', f_ident),
(2, 'return', f_ident),
# once more; returns end-of-iteration with
# actually raising an exception
(2, 'call', f_ident),
(2, 'return', f_ident),
(1, 'return', g_ident),
])
def test_stop_iteration(self):
def f():
for i in range(2):
yield i
raise StopIteration
def g(p):
for i in f():
pass
f_ident = ident(f)
g_ident = ident(g)
self.check_events(g, [(1, 'call', g_ident),
# call the iterator twice to generate values
(2, 'call', f_ident),
(2, 'return', f_ident),
(2, 'call', f_ident),
(2, 'return', f_ident),
# once more to hit the raise:
(2, 'call', f_ident),
(2, 'return', f_ident),
(1, 'return', g_ident),
])
class ProfileSimulatorTestCase(TestCaseBase):
def new_watcher(self):
return ProfileSimulator(self)
def test_simple(self):
def f(p):
pass
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_basic_exception(self):
def f(p):
1./0
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_caught_exception(self):
def f(p):
try: 1./0
except: pass
f_ident = ident(f)
self.check_events(f, [(1, 'call', f_ident),
(1, 'return', f_ident),
])
def test_distant_exception(self):
def f():
1./0
def g():
f()
def h():
g()
def i():
h()
def j(p):
i()
f_ident = ident(f)
g_ident = ident(g)
h_ident = ident(h)
i_ident = ident(i)
j_ident = ident(j)
self.check_events(j, [(1, 'call', j_ident),
(2, 'call', i_ident),
(3, 'call', h_ident),
(4, 'call', g_ident),
(5, 'call', f_ident),
(5, 'return', f_ident),
(4, 'return', g_ident),
(3, 'return', h_ident),
(2, 'return', i_ident),
(1, 'return', j_ident),
])
def ident(function):
if hasattr(function, "f_code"):
code = function.f_code
else:
code = function.func_code
return code.co_firstlineno, code.co_name
def protect(f, p):
try: f(p)
except: pass
protect_ident = ident(protect)
def capture_events(callable, p=None):
if p is None:
p = HookWatcher()
# Disable the garbage collector. This prevents __del__s from showing up in
# traces.
old_gc = gc.isenabled()
gc.disable()
try:
sys.setprofile(p.callback)
protect(callable, p)
sys.setprofile(None)
finally:
if old_gc:
gc.enable()
return p.get_events()[1:-1]
def show_events(callable):
import pprint
pprint.pprint(capture_events(callable))
def test_main():
test_support.run_unittest(
TestGetProfile,
ProfileHookTestCase,
ProfileSimulatorTestCase
)
if __name__ == "__main__":
test_main()