补充部署脚本netstat端口检测

bin/prod/deploy_from_package_test.sh

@@ -182,10 +182,33 @@ test_multiple_release_zip_should_fail() {
     cleanup_release_dir "$release_dir"
 }
 
+test_netstat_fallback_should_work() {
+    release_dir=$(mktemp -d)
+    backend_port=$(find_free_port)
+    trap 'cleanup_release_dir "$release_dir"' EXIT INT TERM
+
+    prepare_release_dir "$release_dir" "$backend_port"
+    mkdir -p "$release_dir/fake-port-bin"
+    ln -sf /usr/sbin/netstat "$release_dir/fake-port-bin/netstat"
+
+    (
+        cd "$release_dir"
+        PATH="$release_dir/fake-port-bin:/usr/bin:/bin" ./deploy_from_package.sh
+    )
+
+    assert_file_exists "$release_dir/frontend/dist/index.html"
+    backend_pid=$(cat "$release_dir/backend/backend.pid")
+    kill -0 "$backend_pid" 2>/dev/null || fail "expected backend pid to be running with netstat fallback"
+
+    trap - EXIT INT TERM
+    cleanup_release_dir "$release_dir"
+}
+
 main() {
     [ -f "$SCRIPT_UNDER_TEST" ] || fail "script under test not found: $SCRIPT_UNDER_TEST"
     test_deploy_success
     test_multiple_release_zip_should_fail
+    test_netstat_fallback_should_work
     printf 'PASS: deploy_from_package tests\n'
 }