How To Mock HttpClient in C# Unit Tests

How to mock the c# http client when for your unit tests.
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#aspnetcore #httpclient #csharp

[@BrentDowdy-k4n]

Crushed it, I give this to anyone that asks about HttpClient. Thanks!

[@MayronWoW]

I would say your HttpMessageHandlerMock class is more of a Stub than a Mock. A stub is a simple fake object with the data you need to pass a test, whereas mock's are usually smarter, such as allowing you to verify calls against them. I'd rename it to HttpMessageHandlerStub.

[@RawCoding]

Yea I avoid that type of terminology, fake,stub,mock etc.. are all mocks to me

[@sajagjain7169]

This is Epic. I just got a notification for this. I have meaning to get to know this for quite sometime now

[@stefanbogdanovic590]

Exactly what I was looking for! Thanks man :D

[@carstenvoss6169]

I am asking myself, what the test tests. In the second example, you test that the HttpClient returns a response that you provided

[@RawCoding]

I am showing how to mock an httpclient for testing, I am not testing anything so you shouldn’t be asking yourself that because the video is not about writing a test.

[@ivanvincent7534]

I heard on another video that it’s best to use the Http factory to create clients.. supposedly it handles potential memory leaks better... With that in mind would you say it’s possible to mock a factory to create clients for testing?

[@RawCoding]

You’d make the factory return an instance as described in the video.

[@burakb8708]

I don't get why we need to delve into the specifics of http client for our tests.

[@lewispil3529]

great video, l learned a lot!

[@JoelStrait-j9m]

Wondering how to copy the source code from this video? I am trying to understand mocking, confusing.

[@Micosek98]

Thanks for help, you are great :D

[@SuperTenja]

Hey, can we get the code repo for the above (it is not there in the description). Thanks!

[@bo44arov]

Why don't we just wrap httpClient into some httpService and then mock it?

[@RawCoding]

Even if you wrap infinitely down below there will still be an httpclient you’ll need to test.

[@arkkism]

Have you considered using Moq?

[@MayronWoW]

Moq only allows you to mock interfaces, not concrete types, and HttpClient is an old artifact of .net which has no interface.

[@mteeum]

var handlerMock = new Mock(MockBehavior.Strict);
handlerMock
.Protected()
.Setup(
"SendAsync",
ItExpr.IsAny(),
ItExpr.IsAny()
)
.ReturnsAsync(new HttpResponseMessage()
{
StatusCode = HttpStatusCode.NoContent
});
This works :)

[@ShwetaRaut-z3u]

what to do for recursive api call

[@Kevinob]

Hi, thanks, where is the repo in your github?

[@RawCoding]

Check description

[@assafkerenak]

Font too small, hard to see what you write

[@RawCoding]

🔎

[@assafkerenak]

@@RawCoding on smartphone it's very inconvenient,I would appreciate if you try bigger font