Attempt to test Builder, using Firebase mock

__mocks__/gatsby-plugin-firebase.js

@@ -0,0 +1,14 @@
+import demoResume from '../src/data/demoState.json';
+
+module.exports = {
+  database: jest.fn().mockReturnValue({
+    ref: jest.fn().mockReturnValue({
+      once: jest.fn().mockResolvedValue({
+        val: jest.fn().mockReturnValue(demoResume),
+      }),
+    }),
+  }),
+  auth: jest.fn().mockReturnValue({
+    onAuthStateChanged: jest.fn(),
+  }),
+};