public async Task GivenChain_WhenNoneShouldReturn_ThenResponseIsNull()
{
var link = AsyncChainFactory <MyRequest, MyResponse>
.Initialize()
.StartWith(new MyLink1(true))
.FollowedBy(new MyLink2(true))
.FollowedBy(new MyLink3(true))
.Build();
var request = new MyRequest();
var response = await link.HandleAsync(request);
response.Should().BeNull();
}
public async Task GivenChain_WhenTheThirdLinkShouldReturn_ThenResponseIsAsExpected()
{
var link = AsyncChainFactory <MyRequest, MyResponse>
.Initialize()
.StartWith(new MyLink1(true))
.FollowedBy(new MyLink2(true))
.FollowedBy(new MyLink3(false))
.Build();
var request = new MyRequest();
var response = await link.HandleAsync(request);
response.HandledBy.Should().BeOfType(typeof(MyLink3));
}
public async Task GivenChain_WhenOnlyFirstTwoShouldBeCalled_ThenOnlyFirstTwoAreCalled()
{
var link = AsyncChainFactory <MyRequest>
.Initialize()
.StartWith(new MyLink1(true))
.FollowedBy(new MyLink2(false))
.FollowedBy(new MyLink3(false))
.Build();
var request = new MyRequest();
await link.HandleAsync(request);
request.Visited.Should()
.NotBeEmpty()
.And.HaveCount(2)
.And.ContainInOrder(new[] { typeof(MyLink1).Name, typeof(MyLink2).Name });
}
public async Task GivenChain_WhenContainsDuplicateLinks_ThenAllAreCalled()
{
var link = AsyncChainFactory <MyRequest, MyResponse>
.Initialize()
.StartWith(new MyLink1(true))
.FollowedBy(new MyLink2(true))
.FollowedBy(new MyLink1(true))
.Build();
var request = new MyRequest();
await link.HandleAsync(request);
request.Visited.Should()
.NotBeEmpty()
.And.HaveCount(3)
.And.ContainInOrder(new[] { typeof(MyLink1).Name, typeof(MyLink2).Name, typeof(MyLink1).Name });
}
public void GivenChain_ThenSequenceIsCorrect()
{
IAsyncChainLink <MyRequest> myLink1 = new MyLink1(false);
IAsyncChainLink <MyRequest> myLink2 = new MyLink2(false);
IAsyncChainLink <MyRequest> myLink3 = new MyLink3(false);
var link = AsyncChainFactory <MyRequest>
.Initialize()
.StartWith(myLink1)
.FollowedBy(myLink2)
.FollowedBy(myLink3)
.Build();
var links = ChainInspector.UnfoldChain(link);
links.Should()
.NotBeEmpty()
.And.HaveCount(3)
.And.ContainInOrder(new[] { myLink1, myLink2, myLink3 });
}
