chore: Spectron for e2e tests

e2e/common-setup.ts

@@ -0,0 +1,41 @@
+const Application = require('spectron').Application;
+const electronPath = require('electron'); // Require Electron from the binaries included in node_modules.
+const path = require('path');
+
+export default function setup() {
+  beforeEach(async function () {
+    this.app = new Application({
+      // Your electron path can be any binary
+      // i.e for OSX an example path could be '/Applications/MyApp.app/Contents/MacOS/MyApp'
+      // But for the sake of the example we fetch it from our node_modules.
+      path: electronPath,
+
+      // Assuming you have the following directory structure
+
+      //  |__ my project
+      //     |__ ...
+      //     |__ main.js
+      //     |__ package.json
+      //     |__ index.html
+      //     |__ ...
+      //     |__ test
+      //        |__ spec.js  <- You are here! ~ Well you should be.
+
+      // The following line tells spectron to look and use the main.js file
+      // and the package.json located 1 level above.
+      args: [path.join(__dirname, '..')],
+      webdriverOptions: {}
+    });
+    await this.app.start();
+    const browser = this.app.client;
+    await browser.waitUntilWindowLoaded();
+
+    browser.timeouts('script', 15000);
+  });
+
+  afterEach(function () {
+    if (this.app && this.app.isRunning()) {
+      return this.app.stop();
+    }
+  });
+}