Automated code reviews via mutation testing - semantic code coverage.
An automated code review tool, with a side effect of producing semantic code coverage metrics.
Think of mutant as an expert developer that simplifies your code while making sure that all tests pass.
That developer never has a bad day and is always ready to jump on your PR.
Each reported simplification signifies either:
A) A piece of code that does more than the tests ask for. You can probably use the simplified version of the code. OR:
B) If you have a reason to not take the simplified version as it violates a requirement: There was no test that proves the extra requirement. Likely you are missing an important test for that requirement.
On extensive mutant use A) happens more often than B), which leads to overall less code enter your repository at higher confidence for both the author and the reviewer.
BTW: Mutant is a mutation testing tool, which is a form of code coverage. But each reported uncovered mutation is actually a call to action, just like a flag in a code review would be.
Mutant is supported and tested under Linux and Mac OS X.
Mutant supports multiple ruby versions at different levels:
Supported indicates if a specific Ruby version / Implementation is actively supported. Which means:
Implementation | Version | Runtime | Syntax | Mutations | Supported |
---|---|---|---|---|---|
cRUBY/MRI | 3.0 | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
cRUBY/MRI | 3.1 | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
cRUBY/MRI | 3.2 | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
cRUBY/MRI | 3.3 | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
jruby | TBD | :email: | :email: | :email: | :email: |
mruby | TBD | :email: | :email: | :email: | :email: |
cRUBY/MRI | < 3.0 | :no_entry: | :no_entry: | :no_entry: | :no_entry: |
Labels:
Mutant is commercial software, with a free usage plan for opensource projects.
Commercial projects have to acquire a license per developer, with unlimited repositories per developer. CI usage for licensed developers is included.
Opensource projects have to acquire their free license per repository. That license will work for any contributor implicitly. Typically the project maintainer gets the license.
The license distribution happens through the mutant-license
gem. Mutant installs without
that dependency, but will not be very cooperative unless mutant-license
is also available.
The license gem is dynamically generated per licensee and comes with a unique license gem source URL.
After signup for a license the following has to be added to your Gemfile
replacing ${key}
with the license key and ${plan}
with com
for commercial or oss
for opensource usage.
source 'https://${plan}:${key}@gem.mutant.dev' do
gem 'mutant-license'
end
The mutant license gem contains metadata that allows mutant to verify licensed use.
For commercial licenses mutant checks the git commit author or the configured git email to be in the set of licensed developers.
For opensource licenses mutant checks the git remotes against the licensed git repositories. This allows the project maintainer to sign up and not bother collaborators with the details.
There are, apart from initial license gem installation, no remote interaction for license validation.
As stated above: Opensource projects of any kind are free to use mutant.
Just mail me: Please include:
I do not need any more details.
Mutant is free for opensource use!
For commercial use mutants pricing is subscription based.
Currency | Duration | Cost | Payment Methods |
---|---|---|---|
USD | 1 month | 90$ | Credit Card |
USD | 1 year | 900$ | Credit Card, ACH transfer |
EUR | 1 month | 90€ | Credit Card, SEPA Direct Debit |
EUR | 1 year | 900€ | Credit Card, SEPA Direct Debit, SEPA Transfer |
Costs are per developer using mutant on any number of repositories.
Volume licenses with custom plans are available on request.
Should you want to procure a commercial mutant subscription please mail me.
Please include the following information:
git config user.email
Also feel free to ask any other question I forgot to proactively answer here.
Also checkout the commercial FAQ.
Try the following:
@mbj
.Mutant, as published in the opensource version, would not exist without the help of contributors spending lots of their private time.
Additionally, the following features where sponsored by organizations:
mutant-minitest
integration was sponsored by Arkency
Contents of this repository are maintained by:
Schirp DSO LTD
Director: Markus Schirp
Email: [email protected]
Vat-ID: MT24186727
Registration: C80467
Office address:
2, Carob Lane,
Sir Harry Luke Street
Naxxar NXR 2209,
Malta
Registred Address
Phoenix Business Centre,
The Penthouse,
Old Railway Track,
Santa Venera SVR9022,
Malta