stubbing rails request object, mocking remote requests, and with mocha

stub_requests.rb

  test 'should create account' do
    user = User.find_by(provider: mock_user['provider'], uid: mock_user['uid'])
    assert_nil user
    
    # mock model remote updates
    stub_request(:post, "#{fixtures(:some1).api_url}/destinations")
      .to_return(status: 200, body: {}.to_json, headers: {})
    stub_request(:put, %r{#{fixtures(:some1).api_url}/destinations/\d+})
      .to_return(status: 204, body: {}.to_json, headers: {})

    target = session_create_url(provider: 'identity_api')
    mock_request = ActionController::TestRequest.create()
    mock_request.env['omniauth.auth'] = mock_user # eg : { 'uid' => 'prov|1234', 'provider' => 'auth0', 'info' => { 'email' => 'foo@bar.com', ... } }
    ApplicationController.any_instance.expects(:request).returns(mock_request).at_least_once
    get target
    assert_response :redirect
    assert_equal 'http://some/location', @response.headers['location']
    user = User.find_by(provider: mock_user['provider'], uid: mock_user['uid'])
    assert_not_nil user
  end