Add spectron, mocha and setup basic application test

Author: yamalight

index.js

@@ -29,7 +29,7 @@ function createWindow() {
   );
 
   // Open the DevTools.
-  mainWindow.webContents.openDevTools();
+  // mainWindow.webContents.openDevTools();
 
   // Emitted when the window is closed.
   mainWindow.on('closed', function() {

package.json

@@ -9,7 +9,8 @@
   "scripts": {
     "start": "electron .",
     "lint": "eslint **/*.js",
-    "inspect-main": "electron-inspector"
+    "inspect-main": "electron-inspector",
+    "test": "mocha"
   },
   "devDependencies": {
     "babel-core": "^6.24.0",
@@ -24,7 +25,9 @@
     "eslint-plugin-jsx-a11y": "^4.0.0",
     "eslint-plugin-prettier": "^2.0.1",
     "eslint-plugin-react": "^6.10.3",
-    "prettier": "^0.22.0"
+    "mocha": "^3.4.2",
+    "prettier": "^0.22.0",
+    "spectron": "^3.7.2"
   },
   "dependencies": {
     "axios": "^0.16.1",

test/index.js

@@ -0,0 +1,26 @@
+/* eslint-env node, mocha */
+const assert = require('assert');
+const path = require('path');
+const {Application} = require('spectron');
+
+// construct paths
+const baseDir = path.join(__dirname, '..');
+const electronBinary = path.join(baseDir, 'node_modules', '.bin', 'electron');
+
+describe('Application launch', function() {
+  this.timeout(10000);
+
+  const app = new Application({
+    path: electronBinary,
+    args: [baseDir],
+  });
+
+  beforeEach(() => app.start());
+
+  afterEach(() => app.stop());
+
+  it('Shows an initial window', async () => {
+    const count = await app.client.getWindowCount();
+    assert.equal(count, 1);
+  });
+});