add jest tests and config (#9)

extension/advanzia-assistant.spec.ts

@@ -0,0 +1,12 @@
+import './advanzia-assistant';
+import { Script } from './advanzia-assistant';
+
+describe('#ContentScript', () => {
+    it('should do something', async () => {
+        await new Promise((resolve) => {
+            new Script()
+                .on('done', () => resolve(void 0))
+                .execute();
+        });
+    });
+});

extension/content-script.ts

@@ -4,5 +4,6 @@ const script = new Script();
 
 script
     .on('done', () => console.log('done'))
+    .on('ready', () => console.log('ready'))
     .on('error', (e) => console.log({ errors: script.errors, status: script.status }))
     .execute();

extension/jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'jsdom',
+};