Mutation tests (#207)

* Added infection mutation tests

* Moved min MSI setting to infection.json file

Author: norberttech

.github/workflows/mutation.yml

@@ -0,0 +1,59 @@
+name: "Mutation Tests"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - "1.x"
+  schedule:
+    - cron:  '* 8 * * *'
+
+jobs:
+  compatibility:
+    name: "Mutation Tests"
+
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        dependencies:
+          - "locked"
+        php-version:
+          - "7.4"
+        operating-system:
+          - "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "pcov"
+          php-version: "${{ matrix.php-version }}"
+          ini-values: memory_limit=-1
+
+      - name: "Cache dependencies"
+        uses: "actions/cache@v2"
+        with:
+          path: |
+            ~/.composer/cache
+            vendor
+          key: "php-${{ matrix.php-version }}-${{ matrix.dependencies }}"
+          restore-keys: "php-${{ matrix.php-version }}-${{ matrix.dependencies }}"
+
+      - name: "Install lowest dependencies"
+        if: ${{ matrix.dependencies == 'lowest' }}
+        run: "composer update --prefer-lowest --no-interaction --no-progress --no-suggest"
+
+      - name: "Install highest dependencies"
+        if: ${{ matrix.dependencies == 'highest' }}
+        run: "composer update --no-interaction --no-progress --no-suggest"
+
+      - name: "Install locked dependencies"
+        if: ${{ matrix.dependencies == 'locked' }}
+        run: "composer install --no-interaction --no-progress --no-suggest"
+
+      - name: "Mutation Tests"
+        run: "composer test:mutation"

.phive/phars.xml

@@ -4,4 +4,5 @@
   <phar name="phpstan" version="^0.12.32" installed="0.12.32" location="./tools/phpstan" copy="true"/>
   <phar name="roave/backwardcompatibilitycheck" version="^5.0.0" installed="5.0.0" location="./tools/roave-backward-compatibility-check" copy="true"/>
   <phar name="psalm" version="^3.12.2" installed="3.12.2" location="./tools/psalm" copy="true"/>
+  <phar name="infection" version="^0.16.4" installed="0.16.4" location="./tools/infection" copy="true"/>
 </phive>

composer.json

@@ -51,6 +51,9 @@
         "test" : [
             "phpunit"
         ],
+        "test:mutation": [
+            "tools/infection"
+        ],
         "static:analyze": [
             "tools/psalm --shepherd --stats",
             "tools/phpstan analyze -c phpstan.neon",

infection.json

@@ -0,0 +1,20 @@
+{
+  "timeout": 5,
+  "source": {
+    "directories": [
+      "src"
+    ]
+  },
+  "logs": {
+    "text": "var/logs/infection.log",
+    "summary": "var/logs/infection_summary.log",
+    "debug": "var/logs/infection_summary.log"
+  },
+  "minMsi": 65,
+  "minCoveredMsi": 70,
+  "mutators": {
+    "@default": true
+  },
+  "testFramework": "phpunit",
+  "bootstrap": "./vendor/autoload.php"
+}

phpunit.xml.dist

@@ -10,7 +10,7 @@
         <log type="coverage-html" target="var/phpunit/coverage/html" lowUpperBound="80" highLowerBound="100"/>
     </logging>
     <testsuites>
-        <testsuite name="PHP Matcher Test Suite">
+        <testsuite name="unit">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>