update tests

.github/workflows/shell-quality-checks.yml

@@ -0,0 +1,23 @@
+name: Shell Script Quality Checks
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  shell-quality-checks:
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Install shell linting and testing tools
+        run: brew install bats-core shfmt shellcheck
+
+      - name: Auto-format shell scripts with shfmt
+        run: ./scripts/format.sh
+
+      - name: Run shellcheck linter and bats tests
+        run: ./scripts/check.sh