Delete Account unit tests: added tests related to Google reauthentication

__mocks__/gatsby-plugin-firebase/constants/auth.js

@@ -1,20 +1,36 @@
+const googleAuthProviderId = 'google.com';
+
 const anonymousUser1 = {
   displayName: 'Anonymous User 1',
   email: 'anonymous1@noemail.com',
   isAnonymous: true,
-  uid: 'anonym123',
+  providerId: '',
+  uid: 'anonym1',
 };
 
 const anonymousUser2 = {
   displayName: 'Anonymous User 2',
   email: 'anonymous2@noemail.com',
   isAnonymous: true,
-  uid: 'anonym456',
+  providerId: '',
+  uid: 'anonym2',
+};
+
+const googleUser3 = {
+  displayName: 'Google User 3',
+  email: 'google3@noemail.com',
+  isAnonymous: false,
+  providerId: googleAuthProviderId,
+  uid: 'google3',
 };
 
 const defaultDelayInMilliseconds = 100;
 
 class Auth {
+  static get googleAuthProviderId() {
+    return googleAuthProviderId;
+  }
+
   static get anonymousUser1() {
     return anonymousUser1;
   }
@@ -23,6 +39,10 @@ class Auth {
     return anonymousUser2;
   }
 
+  static get googleUser3() {
+    return googleUser3;
+  }
+
   static get defaultDelayInMilliseconds() {
     return defaultDelayInMilliseconds;
   }