tests for app seletors

x-pack/plugins/endpoint/public/applications/endpoint/store/selectors/app.test.ts

@@ -0,0 +1,62 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { coreMock } from '../../../../../../../../src/core/public/mocks';
+import { endpointAppReducers, GlobalState } from '../reducers';
+import { createStore, Store } from 'redux';
+import { coreStartServices, appBasePath } from './app';
+import { AppDispatch } from '../actions/app';
+import { CoreStart } from 'kibana/public';
+
+describe('app selectors', () => {
+  let store: Store<GlobalState>;
+  let dispatch: AppDispatch;
+  const setupStore = () => {
+    store = createStore(endpointAppReducers);
+    dispatch = store.dispatch;
+  };
+
+  describe('before `appWillMount` action', () => {
+    let state: GlobalState;
+
+    beforeEach(() => {
+      setupStore();
+      state = store.getState();
+    });
+
+    test('coreStartServices is initially null', () => {
+      expect(coreStartServices(state)).toBeNull();
+    });
+
+    test('appBasePath is initially empty string', () => {
+      expect(appBasePath(state)).toEqual('');
+    });
+  });
+
+  describe('after `appWillMount` action', () => {
+    let coreStartServicesMock: CoreStart;
+
+    beforeEach(() => {
+      setupStore();
+      coreStartServicesMock = coreMock.createStart({ basePath: '/some/path' });
+      dispatch({
+        type: 'appWillMount',
+        payload: {
+          appBasePath: '/some/path',
+          coreStartServices: coreStartServicesMock,
+        },
+      });
+    });
+
+    test('coreStartServices set to an object', () => {
+      expect(coreStartServices(store.getState())).toEqual(coreStartServicesMock);
+    });
+
+    test('appBasePath is set', () => {
+      expect(appBasePath(store.getState())).toEqual('/some/path');
+    });
+  });
+});

x-pack/plugins/endpoint/public/applications/endpoint/store/selectors/app.ts

@@ -11,3 +11,7 @@ const selectAppState = (state: GlobalState) => state.app;
 export const coreStartServices = (state: GlobalState) => {
   return selectAppState(state).coreStartServices!;
 };
+
+export const appBasePath = (state: GlobalState) => {
+  return selectAppState(state).appBasePath;
+};