Add tests for Redux enhancer

Author: zalmoxisus

test/app/inject/enhancer.spec.js

@@ -0,0 +1,67 @@
+import 'babel-polyfill';
+import expect from 'expect';
+import { createStore, compose } from 'redux';
+import { listenMessage } from '../../utils/inject';
+import '../../../src/browser/extension/inject/pageScript';
+
+function counter(state = 0, action) {
+  switch (action.type) {
+    case 'INCREMENT': return state + 1;
+    case 'DECREMENT': return state - 1;
+    default: return state;
+  }
+}
+
+describe('Redux enhancer', () => {
+  it('should create the store', async () => {
+    const message = await listenMessage(() => {
+      window.store = createStore(counter, window.devToolsExtension());
+      expect(window.store).toBeA('object');
+    });
+    expect(message.type).toBe('INIT_INSTANCE');
+  });
+
+  it('should perform actions', () => {
+    expect(window.store.getState()).toBe(0);
+    window.store.dispatch({ type: 'INCREMENT' });
+    expect(window.store.getState()).toBe(1);
+    window.store.dispatch({ type: 'INCREMENT' });
+    expect(window.store.getState()).toBe(2);
+  });
+
+  it('should create the store with config parameters', async () => {
+    const name = 'Some title';
+    const message = await listenMessage(() => {
+      window.store = createStore(counter, window.devToolsExtension({
+        name,
+        actionsBlacklist: ['SOME_ACTION'],
+        statesFilter: state => state,
+        serializeState: (key, value) => value
+      }));
+      expect(window.store).toBeA('object');
+    });
+    expect(message.type).toBe('INIT_INSTANCE');
+    expect(message.name).toBe(name);
+  });
+
+  it('should create the store using old Redux api', async () => {
+    const message = await listenMessage(() => {
+      window.store = window.devToolsExtension()(createStore)(counter);
+      expect(window.store).toBeA('object');
+    });
+    expect(message.type).toBe('INIT_INSTANCE');
+  });
+
+  it('should create the store with several enhancers', async () => {
+    const testEnhancer = next =>
+      (reducer, initialState, enhancer) => next(reducer, initialState, enhancer);
+    const message = await listenMessage(() => {
+      window.store = createStore(counter, compose(
+        testEnhancer,
+        window.devToolsExtension())
+      );
+      expect(window.store).toBeA('object');
+    });
+    expect(message.type).toBe('INIT_INSTANCE');
+  });
+});