public function itShouldCreateANullResourceByDefault()
{
// Arrange...
$resourceFactory = $this->mockResourceFactory(new NullResource());
// Act...
$responseBuilder = $this->app->make('responder.success');
// Assert...
$this->assertInstanceOf(NullResource::class, $responseBuilder->getResource());
$resourceFactory->shouldHaveReceived('make')->withNoArgs()->once();
}