cargo-mutants 0.2.9 finds poorly-tested code faster

[sourcefrog]

To try it out, just cargo install cargo-mutants and then run cargo mutants in your source tree. If it doesn't work, please file a bug!

• Faster: cargo mutants no longer runs cargo check before building, in cases where the build products are wanted or tests will be run. This saves a significant amount of work in build phases; in some trees cargo mutants is now 30% faster. (In trees where most of the time is spent running tests the effect will be less.)

• Fixed: Open log files in append mode to fix messages from other processes occasionally being partly overwritten.

• Improved: cargo mutants should now give useful results in packages that use #![deny(unused)] or other mechanisms to reject warnings. Mutated functions often ignore some parameters, which would previously be rejected by this configuration without proving anything interesting about test coverage. Now, --cap-lints=allow is passed in RUSTFLAGS while building mutants, so that they're not falsely rejected and the tests can be exercised.

• Improved: The build dir name includes the root package name.

• Improved: The progress bar shows more information.

• Improved: The final message shows how many mutants were tested and how long it took.

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This discussion was created from the release cargo-mutants 0.2.9.