Merge 6c3cefb into 266860f

.github/workflows/code_checks.yaml

@@ -4,6 +4,22 @@ on:
     - pull_request
 
 jobs:
+    tests:
+        runs-on: ubuntu-latest
+
+        steps:
+            -   uses: actions/checkout@v2
+            -   run: git fetch --depth=100000 origin
+
+            # see https://github.com/shivammathur/setup-php
+            -   uses: shivammathur/setup-php@v1
+                with:
+                    php-version: 7.2
+                    coverage: none
+
+            -   run: composer install --no-progress
+            -   run: vendor/bin/phpunit
+
     ecs:
         runs-on: ubuntu-latest