fix: Update new mParticleInstance instantiation (#974)

Author: alexs-mparticle

src/mparticle-instance-manager.js

@@ -67,7 +67,7 @@ function mParticle() {
         ).toLowerCase();
         var client = self._instances[instanceName];
         if (client === undefined) {
-            client = new mParticleInstance(apiKey, config, instanceName);
+            client = new mParticleInstance(instanceName);
             self._instances[instanceName] = client;
         }
 

src/sdkRuntimeModels.ts

@@ -163,6 +163,7 @@ export interface SDKProduct {
 
 export interface MParticleWebSDK {
     addForwarder(mockForwarder: MPForwarder): void;
+    _instanceName: string;
     _IntegrationCapture: IntegrationCapture;
     IdentityType: valueof<typeof IdentityType>;
     CommerceEventType: valueof<typeof CommerceEventType>;

test/src/tests-mparticle-instance-manager.ts

@@ -291,6 +291,18 @@ describe('mParticle instance manager', () => {
             fetchMock.restore();
         });
 
+        it('uses the correct instance name to identify an instance', async () => {
+            await waitForCondition(() => (
+                mParticle.getInstance('default_instance')._Store.configurationLoaded === true &&
+                mParticle.getInstance('instance2')._Store.configurationLoaded === true &&
+                mParticle.getInstance('instance3')._Store.configurationLoaded === true
+            ));
+
+            expect(mParticle.getInstance('default_instance')._instanceName).to.equal('default_instance');
+            expect(mParticle.getInstance('instance2')._instanceName).to.equal('instance2');
+            expect(mParticle.getInstance('instance3')._instanceName).to.equal('instance3');
+        });
+
         it('creates multiple instances with their own cookies', done => {
             // setTimeout to allow config to come back from the beforeEach initialization
             setTimeout(() => {