fix: add missing tests

src/OnspringClient.ts

@@ -9,7 +9,7 @@ export class OnspringClient {
   /**
    * @readonly {AxiosInstance} client - The axios instance that will be used to make requests to the Onspring API.
    */
-  protected readonly client: AxiosInstance;
+  private readonly _client: AxiosInstance;
 
   /**
    * @constructor - Creates a new instance of the OnspringClient class.
@@ -31,7 +31,7 @@ export class OnspringClient {
       throw new Error('apiKey cannot be null/empty/whitespace.');
     }
 
-    this.client = axios.create({
+    this._client = axios.create({
       baseURL: baseUrl,
       headers: {
         'x-apikey': apiKey,

src/models/App.ts

@@ -1,7 +1,7 @@
 /**
  * @class App - Model for the App object
  */
-class App {
+export class App {
   /**
    * @property {string} href - The URL to the app
    */
@@ -16,4 +16,17 @@ class App {
    * @property {string} name - The name of the app
    */
   name: string;
+
+  /**
+   * @constructor - Creates a new instance of the App class.
+   * @param {string} href - The URL to the app
+   * @param {number} id - The id of the app
+   * @param {string} name - The name of the app
+   * @returns {App} - A new instance of the App class.
+   */
+  constructor(href: string, id: number, name: string) {
+    this.href = href;
+    this.id = id;
+    this.name = name;
+  }
 }