Get more granular info on snapshot pass/fail when using globs

[JohnnyMorganz]

First of all, thank you for the amazing snapshot library. It is incredibly useful!

I am using insta to test a code formatting tool, and I have now got quite a few snapshots (https://github.com/JohnnyMorganz/StyLua/tree/main/tests/snapshots). My snapshot inputs are currently loaded in using a glob pattern - https://github.com/JohnnyMorganz/StyLua/blob/main/tests/tests.rs

I am looking to perform a complete rewrite of the internals of the tool, but the input and output of the tool should remain the same, so snapshots shouldn't change. Since I have a large library of existing snapshots, this helps me a lot in testing.

Whilst working on this, I want to gauge the progress I am making. I am doing this using cargo test, but unfortunately it halts on the first snapshot failure.
What I want to see is, out of all the snapshots, which are currently passing or failing, similar to how vanilla cargo test works for each #[test]. Is there a way to do this?

cargo test will produce something like this:

but I want more granular pass/fail information for each snapshot input in test_standard etc.

cargo insta test will go through and regenerate new snapshots, which is not what I am looking for

[mitsuhiko]

Today that's indeed a bit annoying. Unfortunately there is no way for me to generate a test function for each glob expansion and rusttest does not provide an API to "generate" tests at runtime.

Potentially it might be possible to "defer" the panics when using glob! to the end of the macro. It's something that might be possible to explore.

[mitsuhiko]

I added experimental support for this on a PR. Do you mind giving it a try? #284