Add GitHub Action to Require Tests in Pull Requests

Signed-off-by: Nathanael Esayeas <[email protected]>

Author: ghostwriter

.github/workflows/require-tests.yml

@@ -0,0 +1,17 @@
+name: 'Require Tests'
+
+on:
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: infection/[email protected]
+        with:
+            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+            comment: Could you please add tests to make sure this change works as expected?
+            fileExtensions: '.php'
+            testDir: 'tests'
+            testPattern: '*Test.php'