Mutmut

~~~~~

* `mutmut run 7` will always rerun the mutant `7`

* `mutmut show <filename>` to show all mutants for that file

* `mutmut run <filename>` to run mutation testing on that file

* New experimental plugin system: create a file `mutmut_config.py` in your base directory. In it you can have an `init()` function, and a `pre_mutation(context)` function. You can set `context.skip = True` to skip a mutant, and you can modify `context.config.runner`, this is useful to limit the tests. Check out the `Context` class for what information you get.

* Better display of `mutmut show`/`mutmut result`

* Fixed a spurious mutant on assigning a local variable with type annotations

~~~~~

* mutmut now will rerun tests without mutation when tests have changed. This avoids a common pitfall of introducing a failing test and then having all mutants killed incorrectly

~~~~~~~~~~~~~~~~~~

* Added `mutmut html` report generation.

~~~~~~~~~~~~~~~~~~

* Bugfix for multiple assignment. Mutmut used to not handle `foo = bar = baz` correctly (Thanks Roxane Bellot!)

* Bugfix for incorrect mutation of "in" operator (Thanks Roxane Bellot!)

* Fixed bug where a mutant survived in the internal AST too long. This could cause mutmut to apply more than one mutant at a time.

* Vastly improved startup performance when resuming a mutation run.

* Added new experimental feature for advanced config at runtime of mutations

~~~~~~~~~~~~~~~~~~

* Add `mutmut show [path to file]` command that shows all mutants for a given file

* Better error messages if .coverage file isn't usable

* Added support for windows paths in tests

* Use the same python executable as mutmut is started as if possible

* Dropped python 2 support

* Added more assignment operator mutations

* Bugfixes

~~~~~~~~~~~~~~~~~~

* New mutation: None -> ''

* Display all diffs for surviving mutants for a specific file with `mutmut show all path/to/file.py`

* Display all diffs for surviving mutants with `mutmut show all`

* Fixed a bug with grouping of the results for `mutmut results`

* Fixed bug where `mutmut show X` sometimes showed no diff

* Fixed bug where `mutmut apply X` sometimes didn't apply a mutation

* Improved error message when trying to find the code

* Fixed incorrect help message