refactor(tests): rename e2e tests

tests/utils.js

@@ -0,0 +1,26 @@
+import electron from "electron";
+import { Application } from "spectron";
+
+const beforeEach = function() {
+  this.timeout(15000);
+  this.app = new Application({
+    path: electron,
+    args: ["."],
+    startTimeout: 15000,
+    waitTimeout: 15000
+  });
+  return this.app.start();
+};
+
+const afterEach = function() {
+  this.timeout(15000);
+  if (this.app && this.app.isRunning()) {
+    return this.app.stop();
+  }
+  return undefined;
+};
+
+export default {
+  beforeEach,
+  afterEach
+};