added bats test for ldcache

Author: fcruzcscs

tests/test_ldcache_hook.bats

@@ -0,0 +1,51 @@
+setup() {
+  RUNTIME="${RUNTIME:-crun}"
+  TEST_IMAGE="${TEST_IMAGE:-ubuntu:20.04}"
+
+  TMP_HOOKS_DIR="$(mktemp -d)"
+  TMP_HOOK_LOG_DIR="$(mktemp -d)"
+  HOOK_OUT="${TMP_HOOK_LOG_DIR}/out.log"
+  HOOK_ERR="${TMP_HOOK_LOG_DIR}/err.log"
+
+  cat > "${TMP_HOOKS_DIR}/02-ldcache.json" <<'EOF'
+{
+  "version": "1.0.0",
+  "hook": {
+    "path": "/opt/sarus/bin/ldcache_hook",
+    "env": ["LDCONFIG_PATH=/sbin/ldconfig"]
+  },
+  "stages": ["createContainer"]
+}
+EOF
+}
+
+teardown() {
+  rm -rf "${TMP_HOOKS_DIR}" "${TMP_HOOK_LOG_DIR}"
+}
+
+helper_run_hooked_podman() {
+  # cleanup hook output
+  : > "${HOOK_OUT}"
+  : > "${HOOK_ERR}"
+
+  # run hook with debug output
+  podman --runtime="${RUNTIME}" \
+    --hooks-dir "${TMP_HOOKS_DIR}" \
+    run --rm \
+      --annotation com.hooks.logging.level=0 \
+      --annotation run.oci.hooks.stdout="${HOOK_OUT}" \
+      --annotation run.oci.hooks.stderr="${HOOK_ERR}" \
+      "${TEST_IMAGE}" bash -lc "$1"
+}
+
+@test "hook runs and generates debug logs" {
+  run helper_run_hooked_podman 'true'
+  [ "$status" -eq 0 ]
+  [ -s "$HOOK_OUT" ]
+}
+
+#@test "/etc/ld.so.cache exists after hook" {
+#  # TODO: can we validate that ld.so.cache was recently updated? idea: inject a lib and then see it in hook log
+#  run helper_run_hooked_podman 'true'
+#  [ "$status" -eq 0 ]
+#}