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import unittest
from pyface.ui.qt4.util.gui_test_assistant import \
GuiTestAssistant
from traits.api import Event, HasStrictTraits
class ExampleObject(HasStrictTraits):
""" Test class; target for test_event_loop_until_traits_change. """
spam = Event
eggs = Event
class TestGuiTestAssistant(GuiTestAssistant, unittest.TestCase):
def test_event_loop_until_traits_change_with_single_trait_success(self):
# event_loop_until_traits_change calls self.fail on timeout.
obj = ExampleObject()
# Successful case.
with self.event_loop_until_traits_change(obj, 'spam'):
obj.spam = True
def test_event_loop_until_traits_change_with_single_trait_failure(self):
# event_loop_until_traits_change calls self.fail on timeout.
obj = ExampleObject()
# Failing case.
with self.assertRaises(AssertionError):
with self.event_loop_until_traits_change(obj, 'spam',
timeout=0.1):
obj.eggs = True
def test_event_loop_until_traits_change_with_multiple_traits_success(self):
# event_loop_until_traits_change calls self.fail on timeout.
obj = ExampleObject()
with self.event_loop_until_traits_change(obj, 'spam', 'eggs'):
obj.spam = True
obj.eggs = True
def test_event_loop_until_traits_change_with_multiple_traits_failure(self):
# event_loop_until_traits_change calls self.fail on timeout.
obj = ExampleObject()
with self.assertRaises(AssertionError):
with self.event_loop_until_traits_change(obj, 'spam', 'eggs',
timeout=0.1):
obj.eggs = True
# event_loop_until_traits_change calls self.fail on timeout.
with self.assertRaises(AssertionError):
with self.event_loop_until_traits_change(obj, 'spam', 'eggs',
timeout=0.1):
obj.spam = True
def test_event_loop_until_traits_change_with_no_traits_success(self):
# event_loop_until_traits_change calls self.fail on timeout.
obj = ExampleObject()
# Successful case.
with self.event_loop_until_traits_change(obj):
pass
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