feat: Add Performance Mark for Rokt Script Appended (SDKE-405) (#50)

Author: guillermot

src/Rokt-Kit.js

@@ -20,6 +20,9 @@ var constructor = function () {
     var self = this;
     var EMAIL_SHA256_IDENTITY = 'emailsha256';
     var OTHER_IDENTITY = 'other';
+    var PerformanceMarks = {
+        RoktScriptAppended: 'mp:RoktScriptAppended',
+    };
 
     self.name = name;
     self.moduleId = moduleId;
@@ -137,6 +140,7 @@ var constructor = function () {
             };
 
             target.appendChild(script);
+            captureTiming(PerformanceMarks.RoktScriptAppended);
         } else {
             console.warn('Unable to find Rokt on the page');
         }
@@ -444,6 +448,17 @@ var constructor = function () {
         var LOCAL_LAUNCHER_TEST_GROUP_THRESHOLD = 0.5;
         return Math.random() > LOCAL_LAUNCHER_TEST_GROUP_THRESHOLD;
     }
+
+    function captureTiming(metricName) {
+        if (
+            window &&
+            window.mParticle &&
+            window.mParticle.captureTiming &&
+            metricName
+        ) {
+            window.mParticle.captureTiming(metricName);
+        }
+    }
 };
 
 function generateIntegrationName(customIntegrationName) {

test/src/tests.js

@@ -541,6 +541,9 @@ describe('Rokt Forwarder', () => {
             window.mParticle.Rokt = window.Rokt;
             window.mParticle.Rokt.attachKitCalled = false;
 
+            // Ensure currentLauncher is undefined to trigger script appending
+            window.Rokt.currentLauncher = undefined;
+
             // Set attachKit as async to allow for await calls in the test
             // This is necessary to simiulate a race condition between the
             // core sdk and the Rokt forwarder
@@ -567,6 +570,24 @@ describe('Rokt Forwarder', () => {
             };
             window.mParticle.config = undefined;
             Math.random = () => 1;
+
+            window.mParticle.captureTiming = function (metricName) {
+                window.mParticle.Rokt.capturedPerformanceMetric = metricName;
+            };
+        });
+
+        it('should add a performance marker when the script is appended', async () => {
+            await window.mParticle.forwarder.init(
+                { accountId: '123456' },
+                reportService.cb,
+                false,
+                null,
+                {}
+            );
+
+            window.mParticle.Rokt.capturedPerformanceMetric.should.equal(
+                'mp:RoktScriptAppended'
+            );
         });
 
         it('should create a remote launcher if the partner is not in the local launcher test group', async () => {