public void ReturnAllArticles()
{
// Arrange
var dbContextMock = new Mock <ApplicationDbContext>();
var article = new Article();
var articles = new List <Article>()
{
article
};
var articlesSetMock = new Mock <DbSet <Article> >();
articlesSetMock.SetupData(articles);
dbContextMock.Setup(m => m.Articles).Returns(articlesSetMock.Object);
var service = new ArticleServices(dbContextMock.Object);
// Act
var result = service.ListAllArticles().ToList();
// Assert
CollectionAssert.AreEqual(articles, result);
}