Add more PluginManager tests

tests/unit/test_plugin_manager.py

@@ -4,6 +4,13 @@ import mock
 from flake8.plugins import manager
 
 
+def create_entry_point_mock(name):
+    """Create a mocked EntryPoint."""
+    ep = mock.Mock(spec=['name'])
+    ep.name = name
+    return ep
+
+
 @mock.patch('pkg_resources.iter_entry_points')
 def test_calls_pkg_resources_on_instantiation(iter_entry_points):
     """Verify that we call iter_entry_points when we create a manager."""
@@ -11,3 +18,45 @@ def test_calls_pkg_resources_on_instantiation(iter_entry_points):
     manager.PluginManager(namespace='testing.pkg_resources')
 
     iter_entry_points.assert_called_once_with('testing.pkg_resources')
+
+
+@mock.patch('pkg_resources.iter_entry_points')
+def test_calls_pkg_resources_creates_plugins_automaticaly(iter_entry_points):
+    """Verify that we create Plugins on instantiation."""
+    iter_entry_points.return_value = [
+        create_entry_point_mock('T100'),
+        create_entry_point_mock('T200'),
+    ]
+    plugin_mgr = manager.PluginManager(namespace='testing.pkg_resources')
+
+    iter_entry_points.assert_called_once_with('testing.pkg_resources')
+    assert 'T100' in plugin_mgr.plugins
+    assert 'T200' in plugin_mgr.plugins
+    assert isinstance(plugin_mgr.plugins['T100'], manager.Plugin)
+    assert isinstance(plugin_mgr.plugins['T200'], manager.Plugin)
+
+
+@mock.patch('pkg_resources.iter_entry_points')
+def test_proxies_contains_to_plugins_dictionary(iter_entry_points):
+    """Verify that we can use the PluginManager like a dictionary."""
+    iter_entry_points.return_value = [
+        create_entry_point_mock('T100'),
+        create_entry_point_mock('T200'),
+    ]
+    plugin_mgr = manager.PluginManager(namespace='testing.pkg_resources')
+
+    assert 'T100' in plugin_mgr
+    assert 'T200' in plugin_mgr
+
+
+@mock.patch('pkg_resources.iter_entry_points')
+def test_proxies_getitm_to_plugins_dictionary(iter_entry_points):
+    """Verify that we can use the PluginManager like a dictionary."""
+    iter_entry_points.return_value = [
+        create_entry_point_mock('T100'),
+        create_entry_point_mock('T200'),
+    ]
+    plugin_mgr = manager.PluginManager(namespace='testing.pkg_resources')
+
+    assert isinstance(plugin_mgr['T100'], manager.Plugin)
+    assert isinstance(plugin_mgr['T200'], manager.Plugin)