Set up Jest tests for React-Redux (#332)

.neutrinorc.js

@@ -16,5 +16,6 @@ module.exports = {
   use: [
     'neutrino-preset-mozilla-frontend-infra/react',
     ['@neutrinojs/env', Object.keys(envs)],
+    '@neutrinojs/jest'
   ]
 };

README.md

@@ -40,6 +40,12 @@ yarn start
 
 This should start up a webserver at http://localhost:5000 which you can connect to.
 
+To run the [Jest](https://jestjs.io/) tests for Mission Control's React components, execute:
+
+```bash
+yarn test
+```
+
 Instructions for development (full stack)
 -----------------------------------------
 

bin/build

@@ -13,6 +13,7 @@ printf '{"commit":"%s","version":"%s","source":"https://github.com/%s/%s","build
 echo "Building frontend"
 yarn install
 SERVICE_DOMAIN="" yarn build
+yarn test
 
 echo "Building the docker image with the tag app:build"
 docker build -t app:build .

frontend/test/reducers/reducers.spec.js

@@ -0,0 +1,16 @@
+import rootReducer from '../../reducers';
+import { REQUEST_CHANNEL_PLATFORM_SUMMARY_DATA } from '../../actions';
+
+describe('channelPlatformSummary reducer', () => {
+  it('Requests channel platform summary data', () => {
+    const initialState = {};
+    const action = { type: REQUEST_CHANNEL_PLATFORM_SUMMARY_DATA };
+    const expectedState = {
+      channelPlatformSummary: { isFetching: true },
+      measures: {},
+    };
+    const receivedState = rootReducer(initialState, action);
+
+    expect(expectedState).toEqual(receivedState);
+  });
+});

package.json

@@ -7,9 +7,10 @@
     "coverage": "neutrino test --coverage"
   },
   "devDependencies": {
-    "enzyme": "^2.8.2",
+    "@neutrinojs/jest": "^8.3.0",
+    "enzyme": "^3.7.0",
     "eslint-plugin-react": "^7.1.0",
-    "react-addons-test-utils": "^15.5.1"
+    "react-addons-test-utils": "^15.6.2"
   },
   "dependencies": {
     "@neutrinojs/env": "^8.2.0",