WIP unit tests for instream tracking

karma.conf.maker.js

@@ -170,6 +170,11 @@ module.exports = function(codeCoverage, browserstack, watchMode, file) {
 
     plugins: plugins
   }
+
+  if (file) {
+    config.preprocessors[file] = ['webpack', 'sourcemap'];
+  }
+
   setReporters(config, codeCoverage, browserstack);
   setBrowsers(config, browserstack);
   return config;

src/instreamTracking.js

@@ -38,18 +38,20 @@ const whitelistedResources = /video|fetch|xmlhttprequest|other/;
  *
  * @param {Array<AdUnit>} adUnits
  * @param {Array<Bid>} bidsReceived
+ *
+ * @return {boolean} returns TRUE if tracking started
  */
 export function trackInstreamDeliveredImpressions(adUnits, bidsReceived) {
   const instreamTrackingConfig = config.getConfig('instreamTracking') || {};
   // check if instreamTracking is enabled and performance api is available
   if (!instreamTrackingConfig.enabled || !window.performance || !window.performance.getEntriesByType) {
-    return;
+    return false;
   }
 
   // filter for video bids
   const instreamBids = bidsReceived.filter(bid => bid.mediaType === VIDEO && bid.context !== OUTSTREAM && bid.videoCacheKey);
   if (!instreamBids.length) {
-    return;
+    return false;
   }
 
   // find unique instream ad units
@@ -99,4 +101,6 @@ export function trackInstreamDeliveredImpressions(adUnits, bidsReceived) {
 
   // start polling for network entries
   setTimeout(poll, pollingFreq);
+
+  return true;
 }

test/spec/instreamTracking_spec.js

@@ -0,0 +1,80 @@
+import { expect } from 'chai';
+import { trackInstreamDeliveredImpressions } from 'src/instreamTracking.js';
+import { config } from '../../src/config.js';
+
+const BIDDER_CODE = 'sampleBidder';
+let sandbox;
+
+function mockPerformanceApi() {
+  window.performance = window.performance || {};
+  sandbox.stub(window, 'performance').callsFake(() => {
+    return {
+      'getEntriesByType': () => undefined
+    }
+  });
+}
+
+function enableInstreamTracking() {
+  sandbox.stub(config, 'getConfig').callsFake(() => {
+    return {
+      'instreamTracking': {
+        enabled: true,
+        maxWindow: 1000 * 60,
+        pollingFreq: 500
+      }
+    }
+  });
+}
+
+describe('instream tracking', function () {
+  beforeEach(function () {
+    sandbox = sinon.sandbox.create();
+  })
+
+  afterEach(function () {
+    sandbox.restore();
+  });
+
+  describe('gaurd checks', function () {
+    it('skip if tracking not enable', function () {
+      expect(trackInstreamDeliveredImpressions([], [])).to.be.equal(false);
+    });
+
+    it('run only if instream ad units are present', function () {
+      enableInstreamTracking();
+      mockPerformanceApi();
+      expect(trackInstreamDeliveredImpressions([], [])).to.be.equal(false);
+    });
+
+    it('skip if instream bids not present', function () {
+      enableInstreamTracking();
+      mockPerformanceApi();
+
+      const adUnits = [{
+        code: 'banner',
+        bids: [{
+          bidder: BIDDER_CODE,
+          params: {placementId: 'id'}
+        }]
+      }];
+      const bidRecieved = [{
+        'bidderCode': BIDDER_CODE,
+        'width': 300,
+        'height': 250,
+        'statusMessage': 'Bid available',
+        'adId': '20372a557635064',
+        'requestId': '16ee6b19daeb431',
+        'mediaType': 'banner',
+        'source': 'client',
+        'no_bid': false,
+        'cpm': 1.1495,
+        'ad': "<div id=''></div>",
+        'ttl': 180,
+        'creativeId': '7C19U58N2DL-120340442-30-11',
+        'netRevenue': true,
+        'currency': 'USD',
+      }]
+      expect(trackInstreamDeliveredImpressions(adUnits, bidRecieved)).to.be.equal(false);
+    });
+  });
+});