Tests/parser: use test source

[auduchinok]

An experiment with in-memory setting a test source that is used for parsing.

The current approach seems to rely on writing a file into temp directory and then trying to read it. It have never worked for me during debug. We could try to fix that, but not writing it to disk seems a better thing to do.

[0101]

It wasn't writing it to disk before either: https://github.com/dotnet/fsharp/blob/ddbaafd3533d7c2bc1fe8265938450fef4c6ad93/tests/service/Common.fs#L197

Which is probably the reason it didn't work for you during debug, because Range.DebugCode relies on reading it from disk.

I don't like that this seems to be adding another obstacle to eventually being able to run tests in parallel.

[T-Gro]

It wasn't writing it to disk before either:

https://github.com/dotnet/fsharp/blob/ddbaafd3533d7c2bc1fe8265938450fef4c6ad93/tests/service/Common.fs#L197

Which is probably the reason it didn't work for you during debug, because Range.DebugCode relies on reading it from disk.

I don't like that this seems to be adding another obstacle to eventually being able to run tests in parallel.

If/Once we are ready for parallelism, the storage could be turned into an (WeakMap option), keyed by randomly generated filename per test case. ?

[psfinaki]

Hey @auduchinok, is this still something of your interest?

[github-actions[bot]]

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[github-actions[bot]]

[!CAUTION] Repository is on lockdown for maintenance, all merges are on hold.

[abonie]

Doing clean up in PRs - please reopen if you deem appropriate