test(@embark/communication): add test for embark communication module (#1908)

packages/stack/communication/test/communication.spec.js

@@ -0,0 +1,51 @@
+import sinon from 'sinon';
+import assert from 'assert';
+import { fakeEmbark, Plugins } from 'embark-testing';
+import Communication from '../src/';
+
+describe('stack/communication', () => {
+
+  let communication, communicationNodeLaunchFn, doneCb;
+
+  const { embark } = fakeEmbark();
+
+  beforeEach(() => {
+    communication = new Communication(embark);
+
+    communicationNodeLaunchFn = sinon.spy(done => {
+      embark.events.request('processes:register', 'communication', {
+        launchFn: cb => cb(),
+        stopFn: cb => cb(),
+      });
+
+      embark.events.request('processes:launch', 'communication', err => {
+        done();
+      });
+    });
+
+    doneCb = sinon.fake();
+  });
+
+  afterEach(() => {
+    embark.teardown();
+    sinon.restore();
+  });
+
+  test('it should register and start communication node', () => {
+    const communicationConfig = {
+      provider: 'whisper'
+    };
+
+    const processRegisterHandler = sinon.spy((name, fns) => {});
+    const processLaunchHandler = sinon.spy((name, fn) => fn());
+
+    embark.events.setCommandHandler('processes:register', processRegisterHandler);
+    embark.events.setCommandHandler('processes:launch', processLaunchHandler);
+
+    embark.events.request('communication:node:register', 'whisper', communicationNodeLaunchFn);
+    embark.events.request('communication:node:start', communicationConfig, doneCb);
+
+    assert(communicationNodeLaunchFn.calledOnce);
+    assert(doneCb.calledOnce);
+  });
+});