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How to use on_my_event method in locust

Best Python code snippet using locust
test_plugins.py
Source:test_plugins.py
1from enum import Enum2from samtranslator.plugins import SamPlugins, BasePlugin, LifeCycleEvents3from unittest import TestCase4from mock import Mock, patch, call5class TestSamPluginsRegistration(TestCase):6    def setUp(self):7        # Setup the plugin to be a "subclass" of the BasePlugin8        self.mock_plugin_name = "mock_plugin"9        self.mock_plugin = Mock(spec=BasePlugin)10        self.mock_plugin.name = self.mock_plugin_name11        self.sam_plugins = SamPlugins()12    def test_register_must_work(self):13        self.sam_plugins.register(self.mock_plugin)14        self.assertEqual(self.mock_plugin, self.sam_plugins._get(self.mock_plugin_name))15    def test_register_must_raise_on_duplicate_plugin(self):16        self.sam_plugins.register(self.mock_plugin)17        with self.assertRaises(ValueError):18            self.sam_plugins.register(self.mock_plugin)19    def test_register_must_raise_on_invalid_plugin_type(self):20        # Plugin which is not an instance of BaseClass21        bad_plugin = Mock()22        bad_plugin.name = "some name"23        with self.assertRaises(ValueError):24            self.sam_plugins.register(bad_plugin)25    def test_register_must_append_plugins_to_end(self):26        plugin1 = _make_mock_plugin("plugin1")27        plugin2 = _make_mock_plugin("plugin2")28        plugin3 = _make_mock_plugin("plugin3")29        self.sam_plugins.register(plugin1)30        self.sam_plugins.register(plugin2)31        self.sam_plugins.register(plugin3)32        expected = [plugin1, plugin2, plugin3]33        self.assertEqual(expected, self.sam_plugins._plugins)34    def test_must_register_plugins_list_on_initialization(self):35        plugin1 = _make_mock_plugin("plugin1")36        plugin2 = _make_mock_plugin("plugin2")37        plugins_list = [plugin1, plugin2]38        new_sam_plugin = SamPlugins(plugins_list)39        # Also make sure the plugins are in the same order as in input40        self.assertEqual(plugins_list, new_sam_plugin._plugins)41    def test_must_register_single_plugin_on_initialization(self):42        new_sam_plugin = SamPlugins(self.mock_plugin)43        self.assertTrue(new_sam_plugin.is_registered(self.mock_plugin_name))44    def test_len_must_get_num_registered_plugins(self):45        plugin1 = _make_mock_plugin("plugin1")46        plugin2 = _make_mock_plugin("plugin2")47        self.sam_plugins.register(plugin1)48        self.sam_plugins.register(plugin2)49        self.assertEqual(2, len(self.sam_plugins))50    def test_is_registered_must_find_registered_plugins(self):51        self.sam_plugins.register(self.mock_plugin)52        self.assertTrue(self.sam_plugins.is_registered(self.mock_plugin_name))53    def test_is_registered_must_return_false_when_no_plugins_registered(self):54        # No Plugins are registered55        self.assertFalse(self.sam_plugins.is_registered(self.mock_plugin_name))56    def test_is_registered_must_return_false_for_non_existent_plugins(self):57        # Register a plugin but check with some random name58        self.sam_plugins.register(self.mock_plugin)59        self.assertFalse(self.sam_plugins.is_registered("some plugin name"))60    def test_get_must_return_a_registered_plugin(self):61        plugin1 = _make_mock_plugin("plugin1")62        plugin2 = _make_mock_plugin("plugin2")63        self.sam_plugins.register(plugin1)64        self.sam_plugins.register(plugin2)65        self.assertEqual(plugin1, self.sam_plugins._get(plugin1.name))66        self.assertEqual(plugin2, self.sam_plugins._get(plugin2.name))67    def test_get_must_handle_no_registered_plugins(self):68        # NO plugins registered69        self.assertIsNone(self.sam_plugins._get("some plugin"))70    def test_get_must_handle_non_registered_plugins(self):71        # Register one plugin, but try to retrieve some other non-existent plugin72        self.sam_plugins.register(self.mock_plugin)73        self.assertIsNone(self.sam_plugins._get("some plugin"))74class TestSamPluginsAct(TestCase):75    def setUp(self):76        self.sam_plugins = SamPlugins()77        # Create a mock of LifeCycleEvents object with ONE event called "my_event"78        self.mock_lifecycle_events = Mock(spec=LifeCycleEvents)79        self.my_event = Mock(spec=LifeCycleEvents)80        self.my_event.name = "my_event"81        self.my_event.value = "my_event"82        self.mock_lifecycle_events.my_event = self.my_event83    def test_act_must_invoke_correct_hook_method(self):84        # Setup the plugin to return a mock when the "on_" method is invoked85        plugin = _make_mock_plugin("plugin")86        hook_method = Mock()87        setattr(plugin, "on_"+self.my_event.name, hook_method)88        self.sam_plugins.register(plugin)89        # Call the act method with some arguments and verify that the hook was invoked with correct arguments90        arg1 = "foo"91        arg2 = "bar"92        kwargs1 = "kwargs1"93        kwargs2 = "kwargs2"94        self.sam_plugins.act(self.my_event, arg1, arg2, kwargs1=kwargs1, kwargs2=kwargs2)95        hook_method.assert_called_once_with(arg1, arg2, kwargs1=kwargs1, kwargs2=kwargs2)96    def test_act_must_invoke_hook_on_all_plugins(self):97        # Create three plugins, and setup hook methods on it98        plugin1 = _make_mock_plugin("plugin1"); setattr(plugin1, "on_"+self.my_event.name, Mock())99        plugin2 = _make_mock_plugin("plugin2"); setattr(plugin2, "on_"+self.my_event.name, Mock())100        plugin3 = _make_mock_plugin("plugin3"); setattr(plugin3, "on_"+self.my_event.name, Mock())101        self.sam_plugins.register(plugin1)102        self.sam_plugins.register(plugin2)103        self.sam_plugins.register(plugin3)104        # Call the act method with some arguments and verify that the hook was invoked with correct arguments105        arg1 = "foo"106        arg2 = "bar"107        kwargs1 = "kwargs1"108        kwargs2 = "kwargs2"109        self.sam_plugins.act(self.my_event, arg1, arg2, kwargs1=kwargs1, kwargs2=kwargs2)110        plugin1.on_my_event.assert_called_once_with(arg1, arg2, kwargs1=kwargs1, kwargs2=kwargs2)111        plugin2.on_my_event.assert_called_once_with(arg1, arg2, kwargs1=kwargs1, kwargs2=kwargs2)112        plugin3.on_my_event.assert_called_once_with(arg1, arg2, kwargs1=kwargs1, kwargs2=kwargs2)113    def test_act_must_invoke_plugins_in_sequence(self):114        # Create three plugins, and setup hook methods on it115        plugin1 = _make_mock_plugin("plugin1"); setattr(plugin1, "on_"+self.my_event.name, Mock())116        plugin2 = _make_mock_plugin("plugin2"); setattr(plugin2, "on_"+self.my_event.name, Mock())117        plugin3 = _make_mock_plugin("plugin3"); setattr(plugin3, "on_"+self.my_event.name, Mock())118        # Create a parent mock and attach child mocks to help assert order of the calls119        # https://stackoverflow.com/questions/32463321/how-to-assert-method-call-order-with-python-mock120        parent_mock = Mock()121        parent_mock.attach_mock(plugin1.on_my_event, "plugin1_hook")122        parent_mock.attach_mock(plugin2.on_my_event, "plugin2_hook")123        parent_mock.attach_mock(plugin3.on_my_event, "plugin3_hook")124        self.sam_plugins.register(plugin1)125        self.sam_plugins.register(plugin2)126        self.sam_plugins.register(plugin3)127        # Call the act method128        self.sam_plugins.act(self.my_event)129        # Verify calls were made in the specific sequence130        parent_mock.assert_has_calls([call.plugin1_hook(), call.plugin2_hook(), call.plugin3_hook()])131    def test_act_must_skip_if_no_plugins_are_registered(self):132        # Create three plugins, and setup hook methods on it133        plugin1 = _make_mock_plugin("plugin1"); setattr(plugin1, "on_"+self.my_event.name, Mock())134        # Don't register any plugin135        # Call the act method136        self.sam_plugins.act(self.my_event)137        plugin1.on_my_event.assert_not_called()138    def test_act_must_fail_on_invalid_event_type_string(self):139        with self.assertRaises(ValueError):140            self.sam_plugins.act("some event")141    def test_act_must_fail_on_invalid_event_type_object(self):142        with self.assertRaises(ValueError):143            self.sam_plugins.act(Mock())144    def test_act_must_fail_on_invalid_event_type_enum(self):145        class SomeEnum(Enum):146            A = 1147        with self.assertRaises(ValueError):148            self.sam_plugins.act(SomeEnum.A)149    def test_act_must_fail_on_non_existent_hook_method(self):150        # Create a plugin but setup hook method with wrong name151        plugin1 = _make_mock_plugin("plugin1")152        setattr(plugin1, "on_unknown_event", Mock())153        self.sam_plugins.register(plugin1)154        with self.assertRaises(NameError):155            self.sam_plugins.act(self.my_event)156        plugin1.on_unknown_event.assert_not_called()157    def test_act_must_raise_exceptions_raised_by_plugins(self):158        # Create a plugin but setup hook method with wrong name159        plugin1 = _make_mock_plugin("plugin1"); setattr(plugin1, "on_"+self.my_event.name, Mock())160        self.sam_plugins.register(plugin1)161        # Setup the hook to raise exception162        plugin1.on_my_event.side_effect = IOError163        with self.assertRaises(IOError):164            self.sam_plugins.act(self.my_event)165        plugin1.on_my_event.assert_called_once_with()166    def test_act_must_abort_hooks_after_exception(self):167        # ie. after a hook raises an exception, subsequent hooks must NOT be run168        # Create three plugins, and setup hook methods on it169        plugin1 = _make_mock_plugin("plugin1"); setattr(plugin1, "on_"+self.my_event.name, Mock())170        plugin2 = _make_mock_plugin("plugin2"); setattr(plugin2, "on_"+self.my_event.name, Mock())171        plugin3 = _make_mock_plugin("plugin3"); setattr(plugin3, "on_"+self.my_event.name, Mock())172        # Create a parent mock and attach child mocks to help assert order of the calls173        # https://stackoverflow.com/questions/32463321/how-to-assert-method-call-order-with-python-mock174        parent_mock = Mock()175        parent_mock.attach_mock(plugin1.on_my_event, "plugin1_hook")176        parent_mock.attach_mock(plugin2.on_my_event, "plugin2_hook")177        parent_mock.attach_mock(plugin3.on_my_event, "plugin3_hook")178        self.sam_plugins.register(plugin1)179        self.sam_plugins.register(plugin2)180        self.sam_plugins.register(plugin3)181        # setup plugin2 to raise exception182        plugin2.on_my_event.side_effect = IOError183        # Call the act method184        with self.assertRaises(IOError):185            self.sam_plugins.act(self.my_event)186        # Since Plugin2 raised the exception, plugin3's hook must NEVER be called187        parent_mock.assert_has_calls([call.plugin1_hook(), call.plugin2_hook()])188class TestBasePlugin(TestCase):189    def test_initialization_should_set_name(self):190        name = "some name"191        plugin = BasePlugin(name)192        self.assertEqual(name, plugin.name)193    def test_initialization_without_name_must_raise_exception(self):194        with self.assertRaises(ValueError):195            BasePlugin(None)196    def test_on_methods_must_not_do_anything(self):197        data_mock = Mock()198        # Simple test to verify that all methods starting with "on_" prefix must not implement any functionality199        plugin = BasePlugin("name")200        # Add every on_ method here201        plugin.on_before_transform_resource(data_mock, data_mock, data_mock)202        # `method_calls` tracks calls to the mock, its methods, attributes, and *their* methods & attributes203        self.assertEqual([], data_mock.method_calls)204def _make_mock_plugin(name):205    m = Mock(spec=BasePlugin)206    m.name = name...
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