Test Explorer integration doesn't work in monorepo

[sazzer]

I've just discovered that the VSCode rust-analyzer extension now has support for the Test Explorer, which is awesome. :)

However, it doesn't seem to work for monorepos. That is, cases where the Rust project is not at the root of the repository but rather inside a child directory.

It successfully discovers all of the tests, but running them instead returns:

error: could not find `Cargo.toml` in `/Users/sazzer/source/project` or any parent directory

(Where the Rust project is actually in /Users/sazzer/source/project/service)

So it appears to be trying to run the tests from the repository root instead of the Rust project root.

rust-analyzer version: rust-analyzer version: 0.3.1906-standalone (e4a405f 2024-03-31)

rustc version: rustc 1.77.1 (7cf61ebde 2024-03-27)

editor or extension: VSCode - Extension version v0.3.1906

Cheers

[sazzer]

In addition to this:

• The "Go to Test" button takes me to the correct line of the correct file, so it does know exactly where the tests are located.
• The "Debug Test" button actually works correctly! However, this always gives me a warning of "You can debug only one test at a time" regardless of what I pressed to debug.

So it's only the "Run Test" button - at all levels of the hierarchy - that gets this wrong.

Cheers