def METHOD_NAME(self):
    """Test the plugins.load_all_plugins function."""
    all_plugins = plugins.load_all_plugins(self.session)
    backend_plugins = all_plugins["backends"]
    self.assertEqual(len(backend_plugins), len(EXPECTED_BACKENDS))
    backend_names = sorted(plugin.name for plugin in backend_plugins)
    self.assertEqual(sorted(backend_names), sorted(EXPECTED_BACKENDS))
    ecosystem_plugins = all_plugins["ecosystems"]
    ecosystems = dict(
        (plugin.name, plugin.default_backend) for plugin in ecosystem_plugins
    )
    self.assertEqual(ecosystems, EXPECTED_ECOSYSTEMS)