def test_none_hook_handler(self):
"""Test running a hook without a handler
The next hook in chain still should be called
Simulate an odd situation when we got a hook ID (a hook is inserted)
but a handler for the hook processing wasn't supplied by a user
"""
self.hook.keyboard_id = self.fake_kbhook_id
self.hook.mouse_id = self.fake_mousehook_id
self.hook.handler = None
# replace the system API with a mock object
windll.user32.CallNextHookEx = mock.Mock(return_value=0)
# prepare arguments for _keyboard_ll_hdl call
kbd = win32structures.KBDLLHOOKSTRUCT(0, 0, 0, 0, 0)
res = self.hook._keyboard_ll_hdl(-1, 3, id(kbd))
windll.user32.CallNextHookEx.assert_called_with(
self.fake_kbhook_id, -1, 3, id(kbd))
self.assertEqual(res, 0)
# Setup a fresh mock object and arguments for _mouse_ll_hdl call
windll.user32.CallNextHookEx = mock.Mock(return_value=0)
mouse = win32structures.MSLLHOOKSTRUCT((11, 12), 0, 0, 0, 0)
res = self.hook._mouse_ll_hdl(-1, 3, id(mouse))
self.assertEqual(res, 0)
windll.user32.CallNextHookEx.assert_called_with(
self.fake_mousehook_id, -1, 3, id(mouse))
def test_mouse_hook_exception(self):
"""Test handling an exception in a mouse hook"""
self.hook.handler = _on_hook_event_with_exception
windll.user32.CallNextHookEx = mock.Mock(return_value=0)
mouse = win32structures.MSLLHOOKSTRUCT((11, 12), 0, 0, 0, 0)
self.hook.mouse_id = self.fake_mousehook_id
# Verify CallNextHookEx is called even if there is an exception is raised
self.assertRaises(ValueError, self.hook._mouse_ll_hdl, -1, 3,
id(mouse))
windll.user32.CallNextHookEx.assert_called()
windll.user32.CallNextHookEx.assert_called_with(
self.fake_mousehook_id, -1, 3, id(mouse))
self.assertRaises(ValueError, self.hook._mouse_ll_hdl, 0, 3, id(mouse))
windll.user32.CallNextHookEx.assert_called()
windll.user32.CallNextHookEx.assert_called_with(
self.fake_mousehook_id, 0, 3, id(mouse))