1 files changed, 51 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-http-outgoing-internal-headers.js b/tests/node_compat/test/parallel/test-http-outgoing-internal-headers.js
new file mode 100644
index 000000000..0e4783a6d
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-http-outgoing-internal-headers.js
@@ -0,0 +1,51 @@
+// 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.
+
+// Flags: --expose-internals
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+
+const { kOutHeaders } = require('internal/http');
+const { OutgoingMessage } = require('http');
+
+const warn = 'OutgoingMessage.prototype._headers is deprecated';
+common.expectWarning('DeprecationWarning', warn, 'DEP0066');
+
+{
+  // Tests for _headers get method
+  const outgoingMessage = new OutgoingMessage();
+  outgoingMessage.getHeaders = common.mustCall();
+  outgoingMessage._headers; // eslint-disable-line no-unused-expressions
+}
+
+{
+  // Tests for _headers set method
+  const outgoingMessage = new OutgoingMessage();
+  outgoingMessage._headers = {
+    host: 'risingstack.com',
+    Origin: 'localhost'
+  };
+
+  assert.deepStrictEqual(
+    Object.entries(outgoingMessage[kOutHeaders]),
+    Object.entries({
+      host: ['host', 'risingstack.com'],
+      origin: ['Origin', 'localhost']
+    }));
+}
+
+{
+  // Tests for _headers set method `null`
+  const outgoingMessage = new OutgoingMessage();
+  outgoingMessage._headers = null;
+
+  assert.strictEqual(
+    outgoingMessage[kOutHeaders],
+    null
+  );
+}