public void GetTextDocument() { var textDocument = new TextDocument { Id = "1", Text = "Test1", Name = "Test2", Owner = new ApplicationUser { Id = "1" } }; var documentService = new Mock <IDocumentService>(); documentService .Setup(service => service.GetDocument("1")) .Returns(textDocument); var controller = new DocumentsController(documentService.Object); var result = controller.GetTextDocument("1"); Assert.Equal(textDocument, result); }