def test_unsupported_extensions_are_not_loaded(self):
stub_plugin = ext_stubs.StubPlugin(supported_extensions=["e1", "e3"])
plugin_info = {constants.CORE: stub_plugin}
with mock.patch("tacker.api.extensions.PluginAwareExtensionManager."
"check_if_plugin_extensions_loaded"):
ext_mgr = extensions.PluginAwareExtensionManager('', plugin_info)
ext_mgr.add_extension(ext_stubs.StubExtension("e1"))
ext_mgr.add_extension(ext_stubs.StubExtension("e2"))
ext_mgr.add_extension(ext_stubs.StubExtension("e3"))
self.assertIn("e1", ext_mgr.extensions)
self.assertNotIn("e2", ext_mgr.extensions)
self.assertIn("e3", ext_mgr.extensions)
def test_extensions_are_not_loaded_for_plugins_unaware_of_extensions(self):
class ExtensionUnawarePlugin(object):
"""This plugin does not implement supports_extension method.
Extensions will not be loaded when this plugin is used.
"""
pass
plugin_info = {constants.CORE: ExtensionUnawarePlugin()}
ext_mgr = extensions.PluginAwareExtensionManager('', plugin_info)
ext_mgr.add_extension(ext_stubs.StubExtension("e1"))
self.assertNotIn("e1", ext_mgr.extensions)
def test_invalid_extensions_are_not_registered(self):
class InvalidExtension(object):
"""Invalid extension.
This Extension doesn't implement extension methods :
get_name, get_description, get_namespace and get_updated
"""
def get_alias(self):
return "invalid_extension"
ext_mgr = extensions.ExtensionManager('')
ext_mgr.add_extension(InvalidExtension())
ext_mgr.add_extension(ext_stubs.StubExtension("valid_extension"))
self.assertIn('valid_extension', ext_mgr.extensions)
self.assertNotIn('invalid_extension', ext_mgr.extensions)
