TRAC-2152: Extension tests

extensions/brandstory/brandstory_scrolldepth.js

@@ -82,3 +82,14 @@ window.addEventListener('scroll', function () {
         //sendLinkEvent(scrollDepth, window.utag.data.page_platform, window.utag.data.adobe_pageName, tagNumber);
     }
 });
+
+const exportedFunctions = {
+    getCookie,
+    getDomainTagValue,
+};
+
+// Evaluate runtime environment (Browser or Node.js)
+if (typeof exports === 'object') {
+    // Expose reference to members for unit testing.
+    module.exports = exportedFunctions;
+}

tests/brandstory/brandstory_scrolldepth.test.js

@@ -0,0 +1,102 @@
+const { getCookie, getDomainTagValue } = require('../../extensions/brandstory/brandstory_scrolldepth');
+
+beforeEach(() => {
+  // reset document.cookie before each test
+  Object.defineProperty(document, 'cookie', {
+    writable: true,
+    value: '',
+  });
+});
+
+describe('getCookie', () => {
+  it('should return the correct value when the cookie exists', () => {
+    document.cookie = 's_ppv=xyz,50';
+    expect(getCookie('s_ppv')).toBe('50');
+  });
+
+  it('should return an empty string if the cookie does not exist', () => {
+    document.cookie = 'another_cookie=abc,123';
+    expect(getCookie('s_ppv')).toBe('');
+  });
+
+  it('should decode the cookie value correctly', () => {
+    document.cookie = 's_ppv=abc%20def,75';
+    expect(getCookie('s_ppv')).toBe('75');
+  });
+});
+
+describe('getDomainTagValue', () => {
+  it('should return [206] for "welt.de" domain', () => {
+    expect(getDomainTagValue('www.welt.de')).toEqual([206]);
+  });
+
+  it('should return [10] for "bild.de" domain', () => {
+    expect(getDomainTagValue('www.bild.de')).toEqual([10]);
+  });
+
+  it('should return [31] for "fitbook.de" domain', () => {
+    expect(getDomainTagValue('www.fitbook.de')).toEqual([31]);
+  });
+
+  it('should return [31] for "magazine-fitbook.com" domain', () => {
+    expect(getDomainTagValue('www.magazine-fitbook.com')).toEqual([31]);
+  });
+
+  it('should return [79] for "petbook.de" domain', () => {
+    expect(getDomainTagValue('www.petbook.de')).toEqual([79]);
+  });
+
+  it('should return an empty array for an unknown domain', () => {
+    expect(getDomainTagValue('unknown.com')).toEqual([]);
+  });
+});
+
+describe('Scroll event listener', () => {
+  let addEventListenerSpy;
+  let mockUtag;
+
+  beforeEach(() => {
+    // window.utag mock
+    mockUtag = {
+      link: jest.fn(),
+      data: {
+        page_platform: 'desktop',
+        adobe_pageName: 'home',
+      },
+    };
+    global.window.utag = mockUtag;
+
+    // window.location.hostname mock
+    Object.defineProperty(window, 'location', {
+      value: {
+        hostname: 'www.welt.de',
+      },
+      writable: true,
+    });
+
+    // addEventListener mock
+    addEventListenerSpy = jest.spyOn(window, 'addEventListener');
+
+    // cookie values mock
+    document.cookie = 's_ppv=xyz,50';
+
+    // trigger scroll event
+    const scrollEvent = new Event('scroll');
+    window.dispatchEvent(scrollEvent);
+  });
+
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('should trigger the "scroll depth" event at 50% scroll depth', () => {
+    expect(mockUtag.link).toHaveBeenCalledWith(
+      expect.objectContaining({
+        event_name: 'scroll depth',
+        event_action: 'view50',
+      }),
+      null,
+      [206]
+    );
+  });
+});