Mocking async http calls with HttpResultsFilter

ServiceStack.Text
1

I have some unit tests that use the very useful HttpResultsFilter for mocking/testing results. However I’m switching some of the calls to be async and I can’t see how to do equivalent. I read the [wiki][1] and looked at the [HttpUtilsMockTests][2] but these are all for sync calls and I can’t see equivalent tests for async - is this something that’s possible?

E.g.

[Fact]
public void SyncTest()
{
    HttpWebRequest webRequest = null;

    using (new HttpResultsFilter
    {
        StringResultFn = (request, s) =>
        {
            webRequest = request;
            return "result";
        }
    })
    {
        const string url = "http://127.0.0.1:8500/v1/kv/testKey";
        url.SendStringToUrl("GET", accept: MimeTypes.Json);

        webRequest.RequestUri.Should().Be(url);
    }
}

works fine but

[Fact]
public async Task AsyncTest()
{
    HttpWebRequest webRequest = null;

    using (new HttpResultsFilter
    {
        StringResultFn = (request, s) =>
        {
            webRequest = request;
            return "result";
        }
    })
    {
        const string url = "http://127.0.0.1:8500/v1/kv/testKey";
        await url.SendStringToUrlAsync("GET", accept: MimeTypes.Json);

        webRequest.RequestUri.Should().Be(url);
    }
}

Tries to make the actual HTTP request and I can’t intercept it at all.
[1]: https://github.com/ServiceStack/ServiceStack/wiki/Http-Utils#user-content-http-utils-are-mockable
[2]: https://github.com/ServiceStack/ServiceStack.Text/blob/master/tests/ServiceStack.Text.Tests/HttpUtilsMockTests.cs

2

It wasn’t supported before, but I’ve just added support for mocking Async API’s in this commit.

This is available from v4.0.57 that’s now available on MyGet.

3

Awesome! Thanks very much, will give it a try.