def test_assign_empty_list_no_event(self):
""" assign empty list no event """
a = PluginA()
a.on_trait_change(listener, "x_items")
b = PluginB()
c = PluginC()
application = TestApplication(plugins=[a, b, c])
application.start()
# Assign an empty list to one of the plugin's contributions.
b.x = []
# Make sure we pick up the correct contribution via the application.
extensions = application.get_extensions("a.x")
extensions.sort()
self.assertEqual(3, len(extensions))
self.assertEqual([98, 99, 100], extensions)
# Make sure we pick up the correct contribution via the plugin.
extensions = a.x[:]
extensions.sort()
self.assertEqual(3, len(extensions))
self.assertEqual([98, 99, 100], extensions)
# We shouldn't get a trait event here because we haven't accessed the
# extension point yet!
self.assertEqual(None, listener.obj)
def test_assign_non_empty_list(self):
""" assign non-empty list """
a = PluginA()
a.on_trait_change(listener, "x_items")
b = PluginB()
c = PluginC()
application = TestApplication(plugins=[a, b, c])
application.start()
# fixme: If the extension point has not been accessed then the
# provider extension registry can't work out what has changed, so it
# won't fire a changed event.
self.assertEqual([1, 2, 3, 98, 99, 100], a.x)
# Keep the old values for later slicing check
source_values = list(a.x)
# Assign a non-empty list to one of the plugin's contributions.
b.x = [2, 4, 6, 8]
# Make sure we pick up the new contribution via the application.
extensions = application.get_extensions("a.x")
extensions.sort()
self.assertEqual(7, len(extensions))
self.assertEqual([2, 4, 6, 8, 98, 99, 100], extensions)
# Make sure we pick up the new contribution via the plugin.
extensions = a.x[:]
extensions.sort()
self.assertEqual(7, len(extensions))
self.assertEqual([2, 4, 6, 8, 98, 99, 100], extensions)
# Make sure we got a trait event telling us that the contributions
# to the extension point have been changed.
self.assertEqual(a, listener.obj)
self.assertEqual("x_items", listener.trait_name)
self.assertEqual([2, 4, 6, 8], listener.new.added)
self.assertEqual([1, 2, 3], listener.new.removed)
# The removed entry should match what the old values say
self.assertEqual(
listener.new.removed, source_values[listener.new.index]
)
# If we use the index and apply the changes to the old list, we should
# recover the new list
source_values[listener.new.index] = listener.new.added
self.assertEqual(source_values, application.get_extensions("a.x"))
self.assertEqual(0, listener.new.index.start)
self.assertEqual(3, listener.new.index.stop)
def test_assign_non_empty_list(self):
""" assign non-empty list """
a = PluginA()
a.on_trait_change(listener, "x_items")
b = PluginB()
c = PluginC()
application = TestApplication(plugins=[a, b, c])
application.start()
# fixme: If the extension point has not been accessed then the
# provider extension registry can't work out what has changed, so it
# won't fire a changed event.
self.assertEqual([1, 2, 3, 98, 99, 100], a.x)
# Assign a non-empty list to one of the plugin's contributions.
b.x = [2, 4, 6, 8]
# Make sure we pick up the new contribution via the application.
extensions = application.get_extensions("a.x")
extensions.sort()
self.assertEqual(7, len(extensions))
self.assertEqual([2, 4, 6, 8, 98, 99, 100], extensions)
# Make sure we pick up the new contribution via the plugin.
extensions = a.x[:]
extensions.sort()
self.assertEqual(7, len(extensions))
self.assertEqual([2, 4, 6, 8, 98, 99, 100], extensions)
# Make sure we got a trait event telling us that the contributions
# to the extension point have been changed.
self.assertEqual(a, listener.obj)
self.assertEqual("x_items", listener.trait_name)
self.assertEqual([2, 4, 6, 8], listener.new.added)
self.assertEqual([1, 2, 3], listener.new.removed)
self.assertEqual(0, listener.new.index.start)
self.assertEqual(4, listener.new.index.stop)