如何模拟DbContext

这是我想要测试的代码

public DocumentDto SaveDocument(DocumentDto documentDto) { Document document = null; using (_documentRepository.DbContext.BeginTransaction()) { try { if (documentDto.IsDirty) { if (documentDto.Id == 0) { document = CreateNewDocument(documentDto); } else if (documentDto.Id > 0) { document = ChangeExistingDocument(documentDto); } document = _documentRepository.SaveOrUpdate(document); _documentRepository.DbContext.CommitChanges(); } } catch { _documentRepository.DbContext.RollbackTransaction(); throw; } } return MapperFactory.GetDocumentDto(document); 

}

这是我的测试代码

 [Test] public void SaveDocumentsWithNewDocumentWillReturnTheSame() { //Arrange IDocumentService documentService = new DocumentService(_ducumentMockRepository, _identityOfSealMockRepository, _customsOfficeOfTransitMockRepository, _accountMockRepository, _documentGuaranteeMockRepository, _guaranteeMockRepository, _goodsPositionMockRepository); var documentDto = new NctsDepartureNoDto(); //Act var retDocumentDto = documentService.SaveDocument(documentDto); //Assert Assert.AreEqual(documentDto, documentDto); } 

一旦我运行测试，我就会在行上获得DbContext的Nullexception

  using (_documentRepository.DbContext.BeginTransaction()) 

我遇到的问题是我无法访问DbContext。 我将如何解决它

Answer 1

据我所知，您通过文档服务的构造函数将存储库注入ducumentMockRepository 。 因此，您可以根据自己的期望设置此模拟。

对于你的情况，你也可以用mock替换DbContext

 // I hope you have an interface to abstract DbContext? var dbContextMock = MockRepository.GenerateMock(); // setup expectations for DbContext mock dbContextMock.Expect(...) // bind mock of the DbContext to property of repository.DbContext ducumentMockRepository.Expect(mock => mock.DbContext) .Return(dbContextMock) .Repeat() .Any();