问题描述
我创建了一个抽象类，该类实现了我想为其编写单元测试的Polly。
在我的测试之一中，我想测试我的方法如何处理{
$and: [ // grouping two conditions that Now time needs to be between the start and the end of the shift.
{
$or: [ // compare the start time hour of the shift first
{
'Monday.startTime.hour': {
$lt: parseInt(Now.format('HH'),10),},{
$and: [ // if the upper condition didn't work will need to compare hours and minutes
{
'Monday.startTime.hour': {
$lte: parseInt(Now.format('HH'),{
'Monday.startTime.minute': {
$lte: parseInt(Now.format('mm'),],{
$or: [ // compare the end time hour of the shift first
{
'Monday.endTime.hour': {
$gt: parseInt(Now.format('HH'),{
$and: [ // if the upper condition didn't work will need to compare hours and minutes
{
'Monday.endTime.hour': {
$gte: parseInt(Now.format('HH'),{
'Monday.endTime.minute': {
$gte: parseInt(Now.format('mm'),];
}
的某些值。
由于返回的PolicyResult.FinalException为空，因此我在评估PolicyResult时得到一个NullReferenceException
如何模拟返回的结果？
到目前为止我所拥有的：
result.FinalException------------------编辑1 --------------------------- -----
使用Nkosi的评论，我可以进一步了解，但是public class AbstractRestClientTest
{
private AbstractRestClient _sut;
private Mock<IRestRequestFactory> _requestFactoryMock;
private Mock<IRestClientFactory> _restClientfactoryMock;
private Mock<IPollyPolicyFactory> _policyFactoryMock;
private Mock<IAsyncPolicy> _policyMock;
private const string DUMMY_URL = "http://dosomething.com/getmesomething";
[SetUp]
public void SetUp()
{
_requestFactoryMock = new Mock<IRestRequestFactory>();
_restClientfactoryMock = new Mock<IRestClientFactory>();
_policyFactoryMock = new Mock<IPollyPolicyFactory>();
var settings = new MockSettings();
_policyMock = new Mock<IAsyncPolicy>();
_policyFactoryMock.Setup(mock =>
mock.CreateAsyncResiliencePolicy(settings))
.Returns(_policyMock.Object);
_sut = new MockRestClient(settings,_restClientfactoryMock.Object,_policyFactoryMock.Object,_requestFactoryMock.Object);
}
}
public class MockRestClient : AbstractRestClient
{
public MockRestClient(RestSettings settings,IRestClientFactory restClientFactory,IPollyPolicyFactory pollyPolicyFactory,IRestRequestFactory requestFactory) : base(settings,restClientFactory,pollyPolicyFactory,requestFactory) {
}
}
public class MockSettings : RestSettings
{
public override string Naam => "TestSettings";
}
返回的PolicyResult仍然是_policy.ExecuteAndCaptureAsync。这使我相信，我模拟该方法的方式存在问题。
我将测试更改为以下内容，但仍返回“ null”：
null我评估了[Test]
public async Task HandleRequest_IfFinalExceptionNotNull_ThenThrowsException()
{
var mockResult = new Mock<IRestResponse<int>>();
PolicyResult<IRestResponse<int>> result = PolicyResult<IRestResponse<int>>.Failure(mockResult.Object,new Context());
//Is the following mock correctly setup?
_policyMock.Setup(mock => mock.ExecuteAndCaptureAsync(It.IsAny<Func<Task<IRestResponse<int>>>>()))
.ReturnsAsync(result);
var url = new Url(DUMMY_URL);
Assert.ThrowsAsync<Exception>(() => _sut.GetResult<int>(url));
}
所需的参数，并相应地更改了此方法的设置，我在做什么错了？
解决方法
基于GitHub上公开可用的source code，确实不需要模拟该类。尽管它确实具有内部构造函数，但存在静态工厂方法，该方法应允许创建所需的实例
例如
Context context = //...created as needed
PolicyResult<TestResponse> result = PolicyResult<TestResponse>.Failure(...,context);
选择正确的组合来满足测试中的预期结果。
,问题是我在模拟错误的ExecuteAndCaptureAsync版本，我需要使用以下签名模拟方法：
`Task<PolicyResult> ExecuteAndCaptureAsync(Func<CancellationToken,Task> action,CancellationToken cancellationToken);`
因此，我相应地更改了SetUp后，测试成功了：
[Test]
public async Task HandleRequest_IfFinalExceptionNotNull_ThenThrowsException()
{
var mockResult = new Mock<IRestResponse<int>>();
PolicyResult<IRestResponse<int>> result = PolicyResult<IRestResponse<int>>.Failure(mockResult.Object,new Context());
_policyMock.Setup(mock => mock.ExecuteAndCaptureAsync(
It.IsAny<Func<CancellationToken,Task<IRestResponse<int>>>>(),It.IsAny<CancellationToken>()))
.ReturnsAsync(result);
var url = new Url(DUMMY_URL);
Assert.ThrowsAsync<Exception>(() => _sut.GetResultaat(url,new CancellationToken()));
}