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The output of these tests is too complicated to comfortably verify by hand, but we can still use them to observe changes to the underlying mappings produced by codegen/LLVM. If these tests fail due to non-coverage changes (e.g. in HIR-to-MIR lowering or MIR optimizations), it should usually be OK to just `--bless` them, as long as the `run-coverage` test suite still works. |
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|---|---|---|
| .. | ||
| status-quo | ||
| if.cov-map | ||
| if.rs | ||
| long_and_wide.cov-map | ||
| long_and_wide.rs | ||
| README.md | ||
| trivial.cov-map | ||
| trivial.rs | ||
The tests in ./status-quo were copied from tests/run-coverage in order to
capture the current behavior of the instrumentor on non-trivial programs.
The actual mappings have not been closely inspected.
Maintenance note
These tests can be sensitive to small changes in MIR spans or MIR control flow, especially in HIR-to-MIR lowering or MIR optimizations.
If you haven't touched the coverage code directly, and the run-coverage test
suite still works, then it should usually be OK to just --bless these
coverage mapping tests as necessary, without worrying too much about the exact
changes.