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muttest 0.3.0

• ✨ New JSONMutationReporter writes a report conforming to the mutation-testing-elements schema, a cross-language standard shared by StrykerJS/.NET/Scala — so muttest output can be fed to any schema-compatible tooling.
• ✨ New report() renders a self-contained, source-annotated HTML report (overall score, per-file breakdown, per-line mutant diffs, status filtering, keyboard navigation) from a JSONMutationReporter file.
• ✨ New MultiReporter fans reporter events out to several reporters at once, e.g. a live ProgressMutationReporter alongside a JSONMutationReporter.
• ❗️ A mutant that makes tests error (rather than fail an expectation) is now scored as killed, matching PIT/Stryker/mutmut. Previously it was counted as survived.
• ❗️ Mutants with no test coverage (no matching test file under FileTestStrategy) are now reported as a separate no coverage category and excluded from the score, so untested code no longer looks like escaped mutants.
• ✨ PackageCopyStrategy gained a symlink argument. When TRUE, only the mutated file’s top-level directory is copied and everything else is symlinked to the original, avoiding a full project copy per mutant (helpful for packages with large inst//data/). Defaults to FALSE; unsafe if the test suite writes into the package’s own directories.
• 🐛 FileTestStrategy now matches test files by exact name instead of an unanchored regex, so a source file like mod.R no longer runs test-model.R and filenames with regex metacharacters are handled correctly.
• 🐛 Added missing digest and tools to Imports.

muttest 0.2.1

• Update treesitter queries to work with treesitter >= 1.3.0.

muttest 0.2.0

• ❗️ Renamed plan() to muttest_plan().
• ✨ Add new mutators:
  • boolean_literal(), na_literal() — literal replacement mutators.
  • negate_condition(), remove_condition_negation() — condition mutators.
  • numeric_increment(), numeric_decrement(), index_increment(), index_decrement() — increment/decrement mutators.
  • string_empty(), string_fill() — string mutators.
  • call_name() — call name mutator.
  • remove_negation() — unary negation mutator.
  • replace_return_value() — return value mutator.
  • delete_statement() — removes assignments and standalone calls one at a time to catch untested side effects and dead assignments.
• ✨ Add preset collections for all major mutator groups:
  • boolean_literals() — flips TRUE/FALSE and T/F.
  • na_literals() — swaps NA, NULL, and typed NA variants.
  • numeric_literals() — increments and decrements numeric constants.
  • index_mutations() — shifts subscript indices up and down by one.
  • string_literals() — empties non-empty strings and fills empty ones.
  • condition_mutations() — negates conditions and removes existing negations.
  • arithmetic_operators() — mutates arithmetic operators (+, -, *, /, ^, %%, %/%).
  • comparison_operators() — mutates comparison operators (<, >, <=, >=, ==, !=).
  • logical_operators() — mutates logical operators (&, |, &&, ||).
• ✨ Mutators are now parametrized and accept configuration arguments.
• ✨ ProgressMutationReporter now reports survived mutants.
• ✨ Expose Mutator base class for building custom mutators.
• ✨ muttest() supports parallel execution of mutants.
• ✨ muttest() supports per-mutant timeouts to avoid hanging test runs.
• 🥅 Improved error handling when test execution fails.

muttest 0.1.0

• ✨ Create a testing plan with plan.
• ✨ Run mutation testing with muttest.
• ✨ Support mutating operators with operator.
• ✨ Control copying project to temporary directory with CopyStrategy:
  • PackageCopyStrategy implemented for copying package files.
• ✨ Control test execution for each mutant with TestStrategy:
  • FullTestStrategy for running all tests for each mutant.
  • FileTestStrategy for running only test files matching mutant files.
• ✨ See test results with MutationReporter.
  • ProgressMutationReporter for printing progress to the console.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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