找不到无参数构造函数
找不到无参数构造函数
提问于 2020-05-28 04:38:21
我是单元测试和Moq的新手。我写了4个抛出相同异常的测试，我想我需要在模拟CharacterRepository时添加这些参数CombatHelperContext，IMapper，但是我该怎么做呢？
我的目标是测试crud功能、视图等。
public class CharacterTests
{
[Fact]
public async Task GetAll_ReturnsAViewResult_WithAListOfCharacters()
{
// Arrange
var mockRepo = new Mock<CharacterRepository>();
mockRepo.Setup(repo => repo.GetAll())
.Returns(GetTestCharacters());
var controller = new CharacterController(mockRepo.Object);
// Act
var result = await controller.Get();
// Assert
var viewResult = Assert.IsType<ViewResult>(result);
var model = Assert.IsAssignableFrom<List<CharacterDto>>(
viewResult.ViewData.Model);
Assert.Equal(4, model.Count());
}
[Fact]
public async Task Delete_Character()
{
// Arrange
var mockRepo = new Mock<CharacterRepository>();
mockRepo.Setup(repo => repo.Delete(1));
var controller = new CharacterController(mockRepo.Object);
var characters = GetTestCharacters();
// Act
var result = await controller.Get();
// Assert
Assert.Null(characters.Where(c => c.Id == 1));
}
[Fact]
public async Task Post_NewCharacter_ReturnsInViewResult()
{
// Arrange
CharacterDto newCharacterDto = new CharacterDto();
newCharacterDto.Id = 5;
var mockRepo = new Mock<CharacterRepository>();
mockRepo.Setup(repo => repo.Add(newCharacterDto));
var controller = new CharacterController(mockRepo.Object);
var characters = GetTestCharacters();
// Act
var result = await controller.Get();
// Assert
var viewResult = Assert.IsType<ViewResult>(result);
var model = Assert.IsAssignableFrom<List<CharacterDto>>(
viewResult.ViewData.Model);
Assert.Equal(5, model.Count());
}
[Fact]
public async Task Update_Character()
{
// Arrange
var mockRepo = new Mock<CharacterRepository>();
var characters = GetTestCharacters();
CharacterDto characterToUpdate = characters.FirstOrDefault(c => c.Name == "Zero Two");
var controller = new CharacterController(mockRepo.Object);
// Act
var result = await controller.Get();
characterToUpdate.Name = "Zero Three";
mockRepo.Setup(repo => repo.Update(characterToUpdate));
// Assert
Assert.NotNull(characters.FirstOrDefault(c => c.Name == "Zero Three"));
}
private IQueryable<CharacterDto> GetTestCharacters()
{
var characters = new List<CharacterDto>();
characters.Add(new CharacterDto()
{
Id = 1,
Name = "Zero Two"
});
characters.Add(
new CharacterDto
{
Id = 2,
Name = "Ander"
});
characters.Add(
new CharacterDto
{
Id = 3,
Name = "Jingles"
});
characters.Add(new CharacterDto
{
Id = 4,
Name = "Arthas Menethil"
});
var queryableCharacters = characters.AsQueryable();
return queryableCharacters;
}
}这是我正在模拟的存储库
public class CharacterRepository : MappingRepository<Character, CharacterDto>
{
public CharacterRepository(CombatHelperContext combatHelperContext, IMapper mapper) : base(combatHelperContext, mapper)
{
}
}回答 1
Stack Overflow用户
发布于 2020-05-28 04:54:10
依赖于抽象而不是实现-创建存储库接口：
public interface ICharacterRepository
{
IEnumerable<Character> GetAll();
void Delete(int id);
void Add(Character character);
}现在，模仿就像一种护身符：
var mockRepo = new Mock<ICharacterRepository>();还可以考虑使用AutoFixture或NBuilder之类的工具来生成测试对象。
[Fact]
public async Task GetAll_Returns_ViewResult_With_List_Of_Characters()
{
// Arrange
var fixture = new Fixture();
var characters = fixture.CreateMany<Character>();
var mockRepo = new Mock<ICharacterRepository>();
mockRepo.Setup(repo => repo.GetAll()).Returns(characters);
var controller = new CharacterController(mockRepo.Object);
// Act
var result = await controller.Get();
// Assert
var viewResult = Assert.IsType<ViewResult>(result);
var model = Assert.IsAssignableFrom<List<CharacterDto>>(viewResult.ViewData.Model);
Assert.Equal(characters.Count(), model.Count());
}如果您不能更改当前实现并依赖于接口，那么您应该将构造函数参数作为参数列表提供给new mock：
var combatHelperContext = new CombatHelperContext();
var mapperMock = new Mock<IMapper>();
var mockRepo = new Mock<CharacterRepository>(combatHelperContext, mapperMock.Object);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/62052476
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