Return of the test API and update readme

src/tests/TestAPI.ts

@@ -0,0 +1,27 @@
+import {APIModel} from '../api/APIModel';
+import {MediaTypeModel} from '../models/MediaTypeModel';
+import MediaDbPlugin from '../main';
+
+export class TestAPI extends APIModel {
+	plugin: MediaDbPlugin;
+
+
+	constructor(plugin: MediaDbPlugin) {
+		super();
+
+		this.plugin = plugin;
+		this.apiName = 'TestAPI';
+		this.apiDescription = 'A test API for automated testing.';
+		this.apiUrl = '';
+		this.types = [];
+	}
+
+
+	async getById(item: MediaTypeModel): Promise<MediaTypeModel> {
+		return undefined;
+	}
+
+	async searchByTitle(title: string): Promise<MediaTypeModel[]> {
+		return [] as MediaTypeModel[];
+	}
+}