mirror of https://github.com/rust-lang/rust.git
17 lines
767 B
Markdown
17 lines
767 B
Markdown
The tests in this directory are shared by two different test modes, and can be
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run in multiple different ways:
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- `./x.py test coverage-map` (compiles to LLVM IR and checks coverage mappings)
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- `./x.py test coverage-run` (runs a test binary and checks its coverage report)
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- `./x.py test coverage` (runs both `coverage-map` and `coverage-run`)
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## Maintenance note
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These tests can be sensitive to small changes in MIR spans or MIR control flow,
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especially in HIR-to-MIR lowering or MIR optimizations.
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If you haven't touched the coverage code directly, and the tests still pass in
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`coverage-run` mode, then it should usually be OK to just re-bless the mappings
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as necessary with `./x.py test coverage-map --bless`, without worrying too much
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about the exact changes.
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