我是一个新手,正在努力理解单元测试,并尝试提高我写的代码质量。
我创建了一个WebAPI2项目,返回像下面这样的客户:
public async Task<IHttpActionResult> GetCustomer([FromUri]int id)
{
var customer = await _repository.FindCustomerAsync(id);
return Ok(customer);
}
我的代码仓库
public async Task<Customer> FindCustomerAsync(int id)
{
using (var context = new MyContext())
{
var result = await context.Customers.FindAsync(id);
return result;
}
}
之前我没有返回异步任务,这样很容易测试。将操作迁移到异步任务后,测试变得有点困难。
我正在使用Moq和Xunit,我的单元测试尝试如下:
[Fact()]
public async void GetCustomer()
{
var id = 2;
_customerMock.Setup(x => x.FindCustomerAsync(id))
.Returns(Task.FromResult(FakeCustomers()
.SingleOrDefault(cust => cust.customerID == id)));
var controller = new CustomersController(_customerMock.Object).GetCustomer(id);
var result = await controller as Customer;
Assert.NotNull(result);
//Assert.IsType<OkNegotiatedContentResult<Customer>>(negotiatedResult);
//Assert.Equal(negotiatedResult.Content.customerID, id);
}
我的虚假客户
private IQueryable<Customer> FakeCustomers()
{
return new List<Customer>()
{
new Customer()
{
customerID = 1,
firstName = "Brian",
lastName = "Smith"
},
new Customer()
{
customerID = 2,
firstName = "Tom",
}
}.AsQueryable();
}
尝试强制转换为客户时,测试始终失败 {"对象引用未设置为对象实例。"}
我的测试有什么问题吗?