refactor tests for readability + linting fixes

src/background/init.ts

@@ -0,0 +1,49 @@
+"use strict";
+
+import { app } from "electron";
+import { main } from './run';
+import { backgroundMitt } from './emitter';
+
+let winActive: boolean;
+
+backgroundMitt.on('window-active', (state: boolean) => {
+    winActive =  state;
+});
+
+export function initApp(dev: boolean): void {
+
+    app.on("ready", () => {
+      main();
+    });
+
+    // Quit when all windows are closed.
+    app.on("window-all-closed", () => {
+      if (process.platform !== "darwin") {
+        app.quit();
+      }
+    });
+
+    // TODO: Debug activate functionaity: currently not working.
+    // Might have to de-reference window object
+    app.on("activate", () => {
+      if (winActive === false) {
+        main();
+      }
+    });
+
+    // Exit cleanly on request from parent process in development mode.
+    if (dev) {
+      if (process.platform === "win32") {
+        process.on("message", data => {
+          if (data === "graceful-exit") {
+            app.quit();
+          }
+        });
+      } else {
+        process.on("SIGTERM", () => {
+          app.quit();
+        });
+      }
+    }
+}
+