1 files changed, 30 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-http-outgoing-internal-headernames-getter.js b/tests/node_compat/test/parallel/test-http-outgoing-internal-headernames-getter.js
new file mode 100644
index 000000000..e9b324892
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-http-outgoing-internal-headernames-getter.js
@@ -0,0 +1,30 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+'use strict';
+const common = require('../common');
+
+const { OutgoingMessage } = require('http');
+const assert = require('assert');
+
+const warn = 'OutgoingMessage.prototype._headerNames is deprecated';
+common.expectWarning('DeprecationWarning', warn, 'DEP0066');
+
+{
+  // Tests for _headerNames get method
+  const outgoingMessage = new OutgoingMessage();
+  outgoingMessage._headerNames; // eslint-disable-line no-unused-expressions
+}
+
+{
+  // Tests _headerNames getter result after setting a header.
+  const outgoingMessage = new OutgoingMessage();
+  outgoingMessage.setHeader('key', 'value');
+  const expect = Object.create(null);
+  expect.key = 'key';
+  assert.deepStrictEqual(outgoingMessage._headerNames, expect);
+}