public async Task GetAllAsync_ReturnsAActionResultWithAListOfArticles()
{
_articleServiceMock.Setup(services => services.GetAllAsync()).ReturnsAsync(GetFaceArticles());
var controller = new ArticlesController(_articleServiceMock.Object);
var result = await controller.GetAllAsync();
var actionResult = Assert.IsType <ActionResult <List <Article> > >(result);
var returnValue = Assert.IsType <List <Article> >(actionResult.Value);
Assert.Equal(GetFaceArticles().Count, returnValue.Count());
}