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[Jython-checkins] SF.net SVN: jython:[5364] trunk/jython/Lib/test/test_profilehooks.py
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From: <zy...@us...> - 2008-10-06 22:00:57
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Revision: 5364
http://jython.svn.sourceforge.net/jython/?rev=5364&view=rev
Author: zyasoft
Date: 2008-10-06 22:00:46 +0000 (Mon, 06 Oct 2008)
Log Message:
-----------
From
http://svn.python.org/projects/python/branches/release25-maint/Lib/test/test_profilehooks.py@35570
Added Paths:
-----------
trunk/jython/Lib/test/test_profilehooks.py
Added: trunk/jython/Lib/test/test_profilehooks.py
===================================================================
--- trunk/jython/Lib/test/test_profilehooks.py (rev 0)
+++ trunk/jython/Lib/test/test_profilehooks.py 2008-10-06 22:00:46 UTC (rev 5364)
@@ -0,0 +1,368 @@
+import pprint
+import sys
+import unittest
+
+from test import test_support
+
+
+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):
+ try:
+ sys.setprofile()
+ except TypeError:
+ pass
+ else:
+ raise test_support.TestFailed(
+ 'sys.setprofile() did not raise TypeError')
+
+ if p is None:
+ p = HookWatcher()
+ sys.setprofile(p.callback)
+ protect(callable, p)
+ sys.setprofile(None)
+ return p.get_events()[1:-1]
+
+
+def show_events(callable):
+ import pprint
+ pprint.pprint(capture_events(callable))
+
+
+def test_main():
+ test_support.run_unittest(
+ ProfileHookTestCase,
+ ProfileSimulatorTestCase
+ )
+
+
+if __name__ == "__main__":
+ test_main()
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