有许多基于计时器的运算符,虽然我没有具体的例子,但我认为创建使用计时器的新运算符很常见。那么你将如何编写一个同步运行这些运算符的测试?
作为一个例子,我怎样才能对像BufferWithTime这样的运算符进行单元测试?
答案 0 :(得分:8)
最容易进行测试的方法是使用TestScheduler
:
var source = new Subject<int>();
var scheduler = new TestScheduler();
var outputValues = new List<IList<int>>();
source
.BufferWithTime(TimeSpan.FromTicks(500), scheduler)
.Subscribe(x => outputValues.Add(x));
scheduler.RunTo(1);
source.OnNext(1);
scheduler.RunTo(100);
source.OnNext(2);
scheduler.RunTo(200);
source.OnNext(3);
scheduler.RunTo(501);
source.OnNext(4);
scheduler.RunTo(1001);
Assert.AreEqual(2, outputValues.Count);
Assert.AreEqual(3, outputValues[0].Count);
Assert.AreEqual(1, outputValues[1].Count);
此外,您还可以使用System.Reactive.Testing.dll
中的一组类型,这样可以使事情变得更加轻松,但依赖于Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll
,System.Web.dll
依赖于// using System.Reactive.Testing;
// using System.Reactive.Testing.Mocks;
var scheduler = new TestScheduler();
var source = scheduler.CreateColdObservable(
new Recorded<Notification<int>>(0, new Notification<int>.OnNext(1)),
new Recorded<Notification<int>>(100, new Notification<int>.OnNext(2)),
new Recorded<Notification<int>>(400, new Notification<int>.OnNext(3)),
new Recorded<Notification<int>>(500, new Notification<int>.OnNext(4))
)
.BufferWithTime(TimeSpan.FromTicks(500), scheduler);
var observer = new MockObserver<IList<int>>(scheduler);
source.Subscribe(observer);
scheduler.RunTo(1001);
Assert.AreEqual(2, observer.Count);
Assert.AreEqual(3, observer[0].Value.Value.Count);
Assert.AreEqual(1, observer[1].Value.Value.Count);
(不可用)在客户档案中。)
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