Req.Test.stub/1,2 can be used to stub anything so you could stub Req options:
defmodule MyApp.MyClient do
def new(options) do
Req.new(...)
|> merge_test_options()
end
if Mix.env() == :test do
defp merge_test_options(req) do
Req.merge(req, plug: Req.Test.stub(__MODULE__))
end
else
defp merge_test_options(req) do
req
end
end
end
# test with stub:
Req.Test.stub(MyApp.MyClient, fn conn -> ... end)
# integration test:
Req.Test.stub(MyApp.MyClient, nil)
When you set plug: nil it is as if you never set the option in the first place.
It’s a little bit ugly to change production code to accomodate tests like but I believe it is the most straighforward option. There could be more indirect ways I did not consider yet.
