Delete Account unit tests: added tests related to Google reauthentication

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

@@ -0,0 +1,47 @@
+/* eslint-disable no-underscore-dangle */
+class UserInfo {
+  /**
+   * Creates a new user profile information.
+   *
+   * @param {string|null} displayName Display name.
+   * @param {string|null} email Email.
+   * @param {string} providerId Auth provider ID.
+   * @param {string} uid The user's unique ID.
+   */
+  constructor(displayName, email, providerId, uid) {
+    if (!uid) {
+      throw new Error('uid must be provided.');
+    } else if (typeof uid !== 'string') {
+      throw new Error('uid should be a string.');
+    } else {
+      this._uid = uid;
+    }
+
+    if (typeof providerId !== 'string') {
+      throw new Error('providerId should be a string.');
+    } else {
+      this._providerId = providerId;
+    }
+
+    this._displayName = displayName;
+    this._email = email;
+  }
+
+  get displayName() {
+    return this._displayName;
+  }
+
+  get email() {
+    return this._email;
+  }
+
+  get providerId() {
+    return this._providerId;
+  }
+
+  get uid() {
+    return this._uid;
+  }
+}
+
+export default UserInfo;