Add workflows for mutant, standard, and yardstick

.github/workflows/mutant.yml

@@ -0,0 +1,23 @@
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  mutant:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Ruby
+    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+    # change this to (see https://github.com/ruby/setup-ruby#versioning):
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: "3.1"
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake mutant

.github/workflows/specs.yml

@@ -1,5 +1,3 @@
-name: specs
-
 on:
   push:
     branches: [ "master" ]
@@ -10,13 +8,11 @@ permissions:
   contents: read
 
 jobs:
-  test:
-
+  specs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
         ruby-version: ['3.1', '3.2', '3.3']
-
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby

.github/workflows/standard.yml

@@ -0,0 +1,23 @@
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  standard:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Ruby
+    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+    # change this to (see https://github.com/ruby/setup-ruby#versioning):
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: "3.1"
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake standard

.github/workflows/yardstick.yml

@@ -0,0 +1,23 @@
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  yardstick:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Ruby
+    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+    # change this to (see https://github.com/ruby/setup-ruby#versioning):
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: "3.1"
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake yardstick

README.md

@@ -5,9 +5,15 @@ Module to define equality, equivalence and inspection methods
 
 [![Gem Version](http://img.shields.io/gem/v/equalizer.svg)][gem]
 [![Build Status](https://github.com/dkubb/equalizer/actions/workflows/specs.yml/badge.svg)][specs]
+[![Mutant](https://github.com/dkubb/equalizer/actions/workflows/mutant.yml/badge.svg)][mutant]
+[![Standard](https://github.com/dkubb/equalizer/actions/workflows/standard.yml/badge.svg)][standard]
+[![Yardstick](https://github.com/dkubb/equalizer/actions/workflows/yardstick.yml/badge.svg)][yardstick]
 
 [gem]: https://rubygems.org/gems/equalizer
 [specs]: https://github.com/dkubb/equalizer/actions/workflows/specs.yml
+[mutant]: https://github.com/dkubb/equalizer/actions/workflows/mutant.yml
+[standard]: https://github.com/dkubb/equalizer/actions/workflows/standard.yml
+[yardstick]: https://github.com/dkubb/equalizer/actions/workflows/yardstick.yml
 
 Examples
 --------