[tests][iid] more coverage including change: getToken & deleteToken now have option args with defaults that use app.options.messagingSenderId as authorizedEntity and '*' as scope

bridge/e2e/iid/iid.e2e.js

@@ -1,4 +1,4 @@
-describe('iid()', () => {
+describe.only('iid()', () => {
   describe('get()', () => {
     it('returns instance id string', async () => {
       const iid = await firebase.iid().get();
@@ -10,13 +10,56 @@ describe('iid()', () => {
     it('deletes the current instance id', async () => {
       const iidBefore = await firebase.iid().get();
       iidBefore.should.be.a.String();
-
       await firebase.iid().delete();
 
       const iidAfter = await firebase.iid().get();
       iidAfter.should.be.a.String();
-
       iidBefore.should.not.equal(iidAfter);
     });
   });
+
+  describe('getToken()', () => {
+    it('should return an FCM token from getToken with arguments', async () => {
+      const authorizedEntity = firebase.iid().app.options.messagingSenderId;
+
+      await firebase.iid().delete();
+      const token = await firebase.iid().getToken(authorizedEntity, '*');
+      token.should.be.a.String();
+    });
+
+    it('should return an FCM token from getToken without arguments', async () => {
+      await firebase.iid().delete();
+      const token = await firebase.iid().getToken();
+      token.should.be.a.String();
+    });
+
+    it('should return an FCM token from getToken with 1 argument', async () => {
+      const authorizedEntity = firebase.iid().app.options.messagingSenderId;
+
+      await firebase.iid().delete();
+      const token = await firebase.iid().getToken(authorizedEntity);
+      token.should.be.a.String();
+    });
+  });
+
+  describe('deleteToken()', () => {
+    it('should return nil from deleteToken with arguments', async () => {
+      const authorizedEntity = firebase.iid().app.options.messagingSenderId;
+
+      const token = await firebase.iid().deleteToken(authorizedEntity, '*');
+      should.not.exist(token);
+    });
+
+    it('should return nil from deleteToken without arguments', async () => {
+      const token = await firebase.iid().deleteToken();
+      should.not.exist(token);
+    });
+
+    it('should return nil from deleteToken with 1 argument', async () => {
+      const authorizedEntity = firebase.iid().app.options.messagingSenderId;
+
+      const token = await firebase.iid().deleteToken(authorizedEntity);
+      should.not.exist(token);
+    });
+  });
 });