Added test

Author: rcmctaylor

.github/workflows/check-commit-one-file.yml

@@ -0,0 +1,28 @@
+name: Check One File Commit
+
+on: [push]
+
+jobs:
+  verify-files:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Check that b.txt exists
+        run: |
+          if [ ! -f "b.txt" ]; then
+            echo "❌ b.txt is missing."
+            exit 1
+          else
+            echo "✅ b.txt is present."
+          fi
+
+      - name: Check that a.txt does NOT exist
+        run: |
+          if [ -f "a.txt" ]; then
+            echo "❌ a.txt should not be present."
+            exit 1
+          else
+            echo "✅ a.txt is not present."
+          fi