A convenient way to check something about the request body of a pending HTTP request.

...
    |> ProgramTest.expectHttpRequest "POST"
        "https://example.com/ok"
        (Test.Http.expectJsonBody
            (Json.Decode.field "version" Json.Decode.string)
            (Expect.equal "3.1.5")
        )

Assert that the given HTTP request has the specified header.

...
    |> ProgramTest.expectHttpRequest "POST"
        "https://example.com/ok"
        (Test.Http.hasHeader "Content-Type" "application/json")

This is the same as Http.Timeout_, but is exposed here so that your test doesn't need to import both Http and Test.Http.

This is the same as Http.NetworkError_, but is exposed here so that your test doesn't need to import both Http and Test.Http.

This is a more convenient way to create Http.BadStatus_ and Http.GoodStatus_ values.

Following the logic in elm/http, this will produce Http.GoodStatus_ if the given status code is in the 200 series, otherwise it will produce Http.BadStatus_.