Fix unit test discovery

tests/checks/test_unit_workflows.sh

@@ -7,4 +7,23 @@ set -euo pipefail
 ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
 cd "$ROOT_DIR"
 
-node --test tests/unit/
+if [[ ! -d "tests/unit" ]]; then
+  echo "No tests/unit directory found, skipping unit tests."
+  exit 0
+fi
+
+mapfile -t unit_tests < <(find tests/unit -type f \( \
+  -name "*.test.js" -o \
+  -name "*.spec.js" -o \
+  -name "*.test.mjs" -o \
+  -name "*.spec.mjs" -o \
+  -name "*.test.cjs" -o \
+  -name "*.spec.cjs" \
+\) | sort)
+
+if [[ "${#unit_tests[@]}" -eq 0 ]]; then
+  echo "No unit test files found under tests/unit, skipping unit tests."
+  exit 0
+fi
+
+node --test "${unit_tests[@]}"