Fix example code to actually run 🤦‍♂️

docs/MockFunctions.md

@@ -150,10 +150,9 @@ Now, in order to test this method without actually hitting the API (and thus
 creating slow and fragile tests), we can use the `jest.mock(...)` function to
 automatically mock the axios module.
 
-Once we mock the module we can spy on the `.get` method and provide a
-`mockImplementation` that returns the data we want our test to assert against.
-In effect, we are saying that we want axios.get('/users.json') to return a fake
-response.
+Once we mock the module we can provide a `mockReturnValue` for `.get` that
+returns the data we want our test to assert against. In effect, we are saying
+that we want axios.get('/users.json') to return a fake response.
 
 ```js
 // users.test.js
@@ -163,11 +162,11 @@ import Users from './users';
 jest.mock('axios');
 
 test('should fetch users', () => {
-  const resp = Promise.resolve({data: [{name: 'Bob'}]});
-  axios.get.mockReturnValue(resp);
+  const resp = { data: [{ name: 'Bob' }] }
+  axios.get.mockReturnValue(Promise.resolve(resp)
 
   // or you could use the follwing depending on your use case:
-  // axios.get.mockImpementation(() => resp)
+  // axios.get.mockImpementation(() => Promise.resolve(resp))
 
   return Users.all().then(users => expect(users).toEqual(resp.data));
 });