Add linting

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

.eslintrc

@@ -0,0 +1,13 @@
+{
+  "extends": ["@upstatement", "plugin:jest/recommended"],
+  "plugins": ["jest"],
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "env": {
+    "browser": true,
+    "node": true,
+    "es6": true,
+    "jest": true
+  }
+}

index.js

@@ -5,5 +5,5 @@ const { mockFirebase } = require('./mocks/firebase');
 module.exports = {
   mockFirebase,
   FakeFirestore,
-  FakeAuth
-};
+  FakeAuth,
+};

mocks/auth.js

@@ -39,7 +39,7 @@ class FakeAuth {
     const { uid, ...data } = this.currentUser;
     return { uid, data };
   }
-};
+}
 
 module.exports = {
   FakeAuth,
@@ -49,4 +49,4 @@ module.exports = {
   mockSendVerificationEmail,
   mockSignInWithEmailAndPassword,
   mockVerifyIdToken,
-};
+};

mocks/firebase.js

@@ -1,32 +1,33 @@
 const mockInitializeApp = jest.fn();
 const mockCert = jest.fn();
 
-const firebaseStub = (overrides) => {
+const firebaseStub = overrides => {
   const { FakeFirestore, FakeAuth } = require('firestore-jest-mock');
   return {
     initializeApp: mockInitializeApp,
-  
+
     credential: {
       cert: mockCert,
     },
-  
+
     auth() {
       return new FakeAuth(overrides.currentUser);
     },
-  
+
     firestore() {
       return new FakeFirestore(overrides.database);
-    }
-  }
+    },
+  };
 };
 
-const mockFirebase = (overrides= {}) => {
-  jest.mock('firebase', () => firebaseStub(overrides)) && jest.mock('firebase-admin', () => firebaseStub(overrides));
+const mockFirebase = (overrides = {}) => {
+  jest.mock('firebase', () => firebaseStub(overrides)) &&
+    jest.mock('firebase-admin', () => firebaseStub(overrides));
 };
 
 module.exports = {
   firebaseStub,
   mockFirebase,
   mockInitializeApp,
-  mockCert
-};
+  mockCert,
+};

mocks/firestore.js

@@ -38,7 +38,7 @@ function buildQuerySnapShot(requestedRecords) {
     docs,
     forEach(callback) {
       return docs.forEach(callback);
-    }
+    },
   };
 }
 
@@ -161,7 +161,7 @@ class FakeFirestore {
     mockLimit(...arguments);
     return this;
   }
-};
+}
 
 module.exports = {
   FakeFirestore,
@@ -180,5 +180,5 @@ module.exports = {
   mockBatchDelete,
   mockBatchCommit,
   mockBatchUpdate,
-  mockBatchSet
+  mockBatchSet,
 };