feat: Enhance local launcher logic with user threshold check (#49)

* feat: Enhance local launcher logic with user threshold check

* Rename function

---------

Co-authored-by: Guillermo Tamanaha <v-gtamanaha@mparticle.com>

Author: 2 people

src/Rokt-Kit.js

@@ -435,9 +435,15 @@ var constructor = function () {
     function isPartnerInLocalLauncherTestGroup() {
         return (
             window.mParticle.config &&
-            window.mParticle.config.isLocalLauncherEnabled
+            window.mParticle.config.isLocalLauncherEnabled &&
+            _isAssignedToSampleGroup()
         );
     }
+
+    function _isAssignedToSampleGroup() {
+        var LOCAL_LAUNCHER_TEST_GROUP_THRESHOLD = 0.5;
+        return Math.random() > LOCAL_LAUNCHER_TEST_GROUP_THRESHOLD;
+    }
 };
 
 function generateIntegrationName(customIntegrationName) {

test/src/tests.js

@@ -566,6 +566,7 @@ describe('Rokt Forwarder', () => {
                 },
             };
             window.mParticle.config = undefined;
+            Math.random = () => 1;
         });
 
         it('should create a remote launcher if the partner is not in the local launcher test group', async () => {
@@ -598,6 +599,44 @@ describe('Rokt Forwarder', () => {
             window.mParticle.Rokt.createLocalLauncherCalled.should.equal(true);
         });
 
+        it('should create a remote launcher if the partner is in the local launcher test group but the random number is below the thresholds', async () => {
+            window.mParticle.config = {
+                isLocalLauncherEnabled: true,
+            };
+
+            Math.random = () => 0;
+
+            await window.mParticle.forwarder.init(
+                { accountId: '123456' },
+                reportService.cb,
+                true,
+                null,
+                {}
+            );
+
+            window.mParticle.Rokt.createLauncherCalled.should.equal(true);
+            window.mParticle.Rokt.createLocalLauncherCalled.should.equal(false);
+        });
+
+        it('should create a local launcher if the partner is in the local launcher test group but the random number is above the thresholds', async () => {
+            window.mParticle.config = {
+                isLocalLauncherEnabled: true,
+            };
+
+            Math.random = () => 1;
+
+            await window.mParticle.forwarder.init(
+                { accountId: '123456' },
+                reportService.cb,
+                true,
+                null,
+                {}
+            );
+
+            window.mParticle.Rokt.createLauncherCalled.should.equal(false);
+            window.mParticle.Rokt.createLocalLauncherCalled.should.equal(true);
+        });
+
         it('should call attachKit', async () => {
             await window.mParticle.forwarder.init(
                 { accountId: '123456' },