Trouble using with inline_test_ppx

[evelant]

I'm trying to use rescript-test with inline_test_ppx and am running into some difficulty. inline_test_ppx outputs files as lib/bs/__inline_test.*.mjs. This seems to cause two problems, first it trips up the path logic in rescript-test resulting in

npx retest lib/bs/__inline_test.*.mjs
Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/Users/myuser/dev/myproject/rescript/node_modules/rescript-test/lib/bs/src/Test.mjs' imported from /Users/myuser/dev/myproject/rescript/node_modules/rescript-test/bin/retest.mjs

This can be worked around by changing the path provided to retest

npx retest ../rescript/lib/bs/__inline_test.*.mjs
//it runs 

Unfortunately there is another issue, rescript-test always reports 0 tests even though it's picking up the correct files. This appears to be due to inline_test_ppx using an async require of the target file. For example, the lib/bs/__inline_test.mymodule.mjs will contain something like

import("../../src/mymodule.mjs").catch((e) => {
    if (e.code !== "ERR_MODULE_NOT_FOUND") reject(e)
})

This causes rescript-test to always find 0 tests to run. If I manually change it to a synchronous import like so

import "../../src/mymodule.mjs"

then the tests are found and everything works correctly. I'm not quite sure why rescript-test isn't working with that async import style.

[bloodyowl]

Hi!

Can you create a small repro for the path issue?

For the second point, ReScript Test waits to modules to be imported, computes the tests to execute then runs them in sequence. This is by design to avoid having missed tests. The way the code is generated here seems to indicate there's no way to indicate to the runner that all the tests are ready, so even by adapting the binary, I'm not sure there's much we can do here.