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""" Tests for the base extension registry. """
# Standard library imports.
import unittest
# Enthought library imports.
from enthought.envisage.api import Application, ExtensionPoint
from enthought.envisage.api import ExtensionRegistry, UnknownExtensionPoint
from enthought.envisage.api import UnknownExtension
from enthought.traits.api import List
class ExtensionRegistryTestCase(unittest.TestCase):
""" Tests for the base extension registry. """
###########################################################################
# 'TestCase' interface.
###########################################################################
def setUp(self):
""" Prepares the test fixture before each test method is called. """
# We do all of the testing via the application to make sure it offers
# the same interface!
self.registry = Application(extension_registry=ExtensionRegistry())
return
def tearDown(self):
""" Called immediately after each test method has been called. """
return
###########################################################################
# Tests.
###########################################################################
def test_empty_registry(self):
""" empty registry """
registry = self.registry
# Make sure there are no extensions.
extensions = registry.get_extensions('my.ep')
self.assertEqual(0, len(extensions))
# Make sure there are no extension points.
extension_points = registry.get_extension_points()
self.assertEqual(0, len(extension_points))
return
def test_add_extension_point(self):
""" add extension point """
registry = self.registry
# Add an extension *point*.
registry.add_extension_point(self._create_extension_point('my.ep'))
# Make sure there's NO extensions.
extensions = registry.get_extensions('my.ep')
self.assertEqual(0, len(extensions))
# Make sure there's one and only one extension point.
extension_points = registry.get_extension_points()
self.assertEqual(1, len(extension_points))
self.assertEqual('my.ep', extension_points[0].id)
return
def test_get_extension_point(self):
""" get extension point """
registry = self.registry
# Add an extension *point*.
registry.add_extension_point(self._create_extension_point('my.ep'))
# Make sure we can get it.
extension_point = registry.get_extension_point('my.ep')
self.assertNotEqual(None, extension_point)
self.assertEqual('my.ep', extension_point.id)
return
def test_remove_empty_extension_point(self):
""" remove empty_extension point """
registry = self.registry
# Add an extension point...
registry.add_extension_point(self._create_extension_point('my.ep'))
# ...and remove it!
registry.remove_extension_point('my.ep')
# Make sure there are no extension points.
extension_points = registry.get_extension_points()
self.assertEqual(0, len(extension_points))
return
def test_remove_non_empty_extension_point(self):
""" remove non-empty extension point """
registry = self.registry
# Add an extension point...
registry.add_extension_point(self._create_extension_point('my.ep'))
# ... with some extensions...
registry.set_extensions('my.ep', [42])
# ...and remove it!
registry.remove_extension_point('my.ep')
# Make sure there are no extension points.
extension_points = registry.get_extension_points()
self.assertEqual(0, len(extension_points))
# And that the extensions are gone too.
self.assertEqual([], registry.get_extensions('my.ep'))
return
def test_remove_non_existent_extension_point(self):
""" remove non existent extension point """
registry = self.registry
self.failUnlessRaises(
UnknownExtensionPoint, registry.remove_extension_point, 'my.ep'
)
return
def test_remove_non_existent_listener(self):
""" remove non existent listener """
registry = self.registry
def listener(registry, extension_point, added, removed, index):
""" Called when an extension point has changed. """
self.listener_called = (registry, extension_point, added, removed)
return
self.failUnlessRaises(
ValueError, registry.remove_extension_point_listener, listener
)
return
def test_set_extensions(self):
""" set extensions """
registry = self.registry
# Add an extension *point*.
registry.add_extension_point(self._create_extension_point('my.ep'))
# Set some extensions.
registry.set_extensions('my.ep', [1, 2, 3])
# Make sure we can get them.
self.assertEqual([1, 2, 3], registry.get_extensions('my.ep'))
return
###########################################################################
# Private interface.
###########################################################################
def _create_extension_point(self, id, trait_type=List, desc=''):
""" Create an extension point. """
return ExtensionPoint(id=id, trait_type=trait_type, desc=desc)
# Entry point for stand-alone testing.
if __name__ == '__main__':
unittest.main()
#### EOF ######################################################################
|
