Run tests with Miri

[hkBst]

Currently I do not see an option to run "cargo miri test" to run the tests through miri. Perhaps I missed it, but otherwise it would be a useful addition.

[Imberflur]

I encountered a case where this would have been useful.

[kpreid]

Specific use case that has come up a few times: someone has shared code that has tests, and includes unsafe (or they are asking what unsafe to put in), and I want to see if Miri detects UB when those tests are run. I can rewrite the tests to be a fn main() but this is tedious and means the result doesn’t match the original.

[shepmaster]

In a day or two, once it's deployed, code that is automatically detected as tests will run those tests when selecting Miri from the tools menu: