我是单元测试的新手,但是试着试着改善我编写的代码质量。
我创建了一个webapi2项目,它返回了一个像
这样的客户 public async Task<IHttpActionResult> GetCustomer([FromUri]int id)
{
var customer = await _repository.FindCustomerAsync(id);
return Ok(customer);
}
我的存储库
public async Task<Customer> FindCustomerAsync(int id)
{
using (var context = new MyContext())
{
var result = await context.Customers.FindAsync(id);
return result;
}
}
以前我没有返回异步任务,因为它非常容易测试。将操作迁移到异步任务使我有点难以测试。
我正在使用Moq和Xunit,我在单元测试中的尝试看起来像
[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FakeCustomers
private IQueryable<Customer> FakeCustomers()
{
return new List<Customer>()
{
new Customer()
{
customerID = 1,
firstName = "Brian",
lastName = "Smith"
},
new Customer()
{
customerID = 2,
firstName = "Tom",
}
}.AsQueryable();
}
尝试转换为Customer {“对象引用未设置为对象的实例时”测试总是失败。}}
我的测试错误了吗?
答案 0 :(得分:2)
你能这样试试吗?:
[Fact()]
public async void GetCustomer()
{
var id = 2;
_customerMock.Setup(x => x.FindCustomerAsync(id))
.Returns(Task.FromResult(new Customer()
{
customerID = 2,
firstName = "Tom",
}));
var controller = new CustomersController(_customerMock.Object).GetCustomer(id);
var result = await controller as Customer;
Assert.NotNull(result);
}