Using Moq and IFlurlClientFactory and IFlurlClient

Question

I have a question on how to test / mock out the IFlurlClientFactory and IFlurlClient. I'm registering my service (as a singleton eventually via DI), which uses the IFlurlClientFactory in a following way:

public ImageRetrievalServiceClientV1(
    IFlurlClientFactory flurlClientFactory        
)
{
    _flurlClient = flurlClientFactory.Get(someUrl);       
}

A method is defined in the ImageRetrievalServiceClientV1 where I use the _flurlClient as instantiated above, as follows:

await _flurlClient.Request("some", "path", "segements")
                .WithOAuthBearerToken(token)
                .PostJsonAsync(someObject);

Question: Is there a nice way that can I mock out the IFlurlClientFactory and IFlurlClient using the Moq testing framework? Thanks in advance for the answers.

Regards, Tom

Answer 1

[UPDATE]: I misunderstood the whole point of the HttpTest. Fortunately the docs are clarifying things which I apparently missed in the first instance... -_-'

What I just needed to do was to instantiate HttpTest in my unittest. For example if I want my sut to throw a FlurlHttpException I just need to tell the httpTest instance to respond with, for example, a server error:

using var httpTest = new HttpTest();
//httpTest.RespondWith("some response body");
httpTest.RespondWith("server error", 500);

Instantiate a new PerBaseUrlFlurlClientFactory:

var sut = new ImageRetrievalServiceClientV1(new PerBaseUrlFlurlClientFactory(),....);

Subsequent calls on the sut which trigger the calls are mocked out because of the setup of the HttpTest. This works like a charm!