How to use a mocked data with react-apollo for tests

I'm using react-apollo to build a client that consumes a GraphQL API, however, I'm very stuck on testing. What I want is to mock the server so I can easily test the application without needing to make network calls.

I've found some pointers on how to mock the server:

• https://dev-blog.apollodata.com/mocking-your-server-with-just-one-line-of-code-692feda6e9cd
• http://dev.apollodata.com/tools/graphql-tools/mocking.html#addMockFunctionsToSchema

But there isn't really an example on how to use this mocked server in my app tests to avoid hitting the server.

My goal is to setup integration tests to assert that the app is actually working:

describe('Profile feature', () => {
  beforeAll(() => {
    store = setupStore();
    app = mount(
      <ApolloProvider store={store} client={apolloClient}>
        <ConnectedRouter history={history}>
          <App />
        </ConnectedRouter>
      </ApolloProvider>
    );
  });
});

The store is using Redux and the client is being created like this:

const networkInterface = createNetworkInterface({
  uri: process.env.REACT_APP_API_URL
});

export const apolloClient = new ApolloClient({
  networkInterface
});

How can I use a mocked server with graphql-tools here instead of the actual API?