Firebase Stub refactoring, added eslint-plugin-jest dev dependency

__mocks__/gatsby-plugin-firebase/constants.js

@@ -1 +1,4 @@
-export { Auth as AuthConstants } from './constants/auth';
+import AuthConstants from './constants/auth';
+import DatabaseConstants from './constants/database';
+
+export { AuthConstants, DatabaseConstants };

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

@@ -1,19 +1,27 @@
-class Auth {
-  static anonymousUser1 = {
-    displayName: 'Anonymous User 1',
-    email: 'anonymous1@noemail.com',
-    isAnonymous: true,
-    name: 'Anonymous 1',
-    uid: 'anonym123',
-  };
+const anonymousUser1 = {
+  displayName: 'Anonymous User 1',
+  email: 'anonymous1@noemail.com',
+  isAnonymous: true,
+  name: 'Anonymous 1',
+  uid: 'anonym123',
+};
 
-  static anonymousUser2 = {
-    displayName: 'Anonymous User 2',
-    email: 'anonymous2@noemail.com',
-    isAnonymous: true,
-    name: 'Anonymous 2',
-    uid: 'anonym456',
-  };
+const anonymousUser2 = {
+  displayName: 'Anonymous User 2',
+  email: 'anonymous2@noemail.com',
+  isAnonymous: true,
+  name: 'Anonymous 2',
+  uid: 'anonym456',
+};
+
+class Auth {
+  static get anonymousUser1() {
+    return anonymousUser1;
+  }
+
+  static get anonymousUser2() {
+    return anonymousUser2;
+  }
 }
 
-export { Auth };
+export default Auth;

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

@@ -0,0 +1,19 @@
+const demoStateResume1Id = 'demo_1';
+const demoStateResume2Id = 'demo_2';
+const initialStateResumeId = 'initst';
+
+class Database {
+  static get demoStateResume1Id() {
+    return demoStateResume1Id;
+  }
+
+  static get demoStateResume2Id() {
+    return demoStateResume2Id;
+  }
+
+  static get initialStateResumeId() {
+    return initialStateResumeId;
+  }
+}
+
+export default Database;