How to write a unit test for a conditional macro?

[ffevotte]

@rssdev10

But I can’t force Julia to recompile the macro

I’d advise you to use the same trick as ToggleableAsserts.jl, which I think originates from this discourse thread:

@assert alternatives?

You can also look at taking advantage of constant propogation to get the behavior you want. asserting() = false #making this a function results in code being invalidated and recompiled when this gets changed macro mayassert(test) esc(:(if $(@__MODULE__).asserting() @assert($test) end)) end f(x) = @mayassert x < 2 If we use that in a function we can see it gets compile out julia> @code_llvm f(2) ; @ REPL[3]:1 within `f' define void @julia_f_12238(i64) { top: ret void } we can …

With this technique you explicitly toggle the behavior of your macro by redefining a function, which invalidates all code using the macro and forces a recompilation.

ToggleableAsserts show how easily such macros can be tested:

MasonProtter/ToggleableAsserts.jl/blob/master/test/runtests.jl