I can’t remember where I saw it now, but I’m sure I saw a post about using the :erlang.trace function to set up tracing on the SUT from the test. i.e. setup tracing for YourModule.handle_continue function and when it’s called tear down the tracing and continue with the assertions.
I can’t remember any more details than that, and I haven’t tried it myself but it seems possible to know the function has been called without having to add an extra message just for testing.
