test(add): add the test case for cargo add X@latest
#16406
Draft
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What does this PR try to resolve?
ref #10741
For now, I have added the test case for
cargo add X@latest. I am working on a better error message for it, as proposed in #10741 (comment).This PR is not yet ready for review.
r?@ghost
How to test and review this PR?
Check unit tests.