Integration tests - PHPUnit

.github/workflows/build.yml

@@ -201,3 +201,43 @@ jobs:
 
       - name: "Tests"
         run: "${{ matrix.script }}"
+
+  integration-tests:
+    name: "Integration Tests"
+
+    runs-on: "ubuntu-latest"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        script:
+          - |
+            git clone https://github.com/sebastianbergmann/phpunit.git e2e/integration/repo
+            cd e2e/integration/repo
+            git checkout 9.2.3
+            export COMPOSER_ROOT_VERSION=9.2.3
+            composer install
+            ../../../phpstan.phar analyse -l 8 -c ../phpunit.neon src tests
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2.3.1"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@2.3.0"
+        with:
+          coverage: "none"
+          php-version: "7.4"
+
+      - name: "Cache dependencies"
+        uses: "actions/cache@v2"
+        with:
+          path: "~/.composer/cache"
+          key: "php-7.4-composer-${{ hashFiles('**/composer.json') }}"
+          restore-keys: "php-7.4-composer-"
+
+      - name: "Install dependencies"
+        run: "composer update --no-interaction --no-progress --no-suggest"
+
+      - name: "Tests"
+        run: "${{ matrix.script }}"

e2e/integration/.gitignore

@@ -0,0 +1 @@
+/repo