From 6d3385aa8831b26142ad2218fc40303aa843f278 Mon Sep 17 00:00:00 2001
From: Felix Hamann <felix.hamann@campus.lmu.de>
Date: Mon, 27 May 2019 20:11:27 +0200
Subject: [PATCH] add unit test for main frontend application

---
 frontend/src/app.spec.js | 52 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 frontend/src/app.spec.js

diff --git a/frontend/src/app.spec.js b/frontend/src/app.spec.js
new file mode 100644
index 000000000..8ce962b2d
--- /dev/null
+++ b/frontend/src/app.spec.js
@@ -0,0 +1,52 @@
+import { App } from "./app";
+
+const TEST_UTILS = [
+  { name: 'util1' },
+  { name: 'util2' },
+];
+
+describe('App', () => {
+  let app;
+
+  beforeEach(() => {
+    app = new App();
+  });
+
+  it('should create', () => {
+    expect(app).toBeTruthy();
+  });
+
+  describe('provides services', () => {
+    it('HttpClient as httpClient', () => {
+      expect(app.httpClient).toBeTruthy();
+    });
+
+    it('HtmlHelpers as htmlHelpers', () => {
+      expect(app.htmlHelpers).toBeTruthy();
+    });
+
+    it('I18n as i18n', () => {
+      expect(app.i18n).toBeTruthy();
+    });
+
+    it('UtilRegistry as utilRegistry', () => {
+      expect(app.utilRegistry).toBeTruthy();
+    });
+  });
+
+  describe('registerUtilities()', () => {
+    it('should register the given utilities', () => {
+      spyOn(app.utilRegistry, 'register');
+      app.registerUtilities(TEST_UTILS);
+      expect(app.utilRegistry.register.calls.count()).toBe(TEST_UTILS.length);
+      expect(app.utilRegistry.register.calls.argsFor(0)).toEqual([TEST_UTILS[0]]);
+      expect(app.utilRegistry.register.calls.argsFor(1)).toEqual([TEST_UTILS[1]]);
+    });
+
+    it('should throw an error if not passed an array of utilities', () => {
+      expect(() => {
+        app.registerUtilities({});
+      }).toThrow();
+    });
+  });
+});