1 files changed, 91 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-buffer-list.js b/tests/node_compat/test/parallel/test-stream-buffer-list.js
new file mode 100644
index 000000000..7b16f5d83
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-stream-buffer-list.js
@@ -0,0 +1,91 @@
+// 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';
+require('../common');
+const assert = require('assert');
+const BufferList = require('internal/streams/buffer_list');
+
+// Test empty buffer list.
+const emptyList = new BufferList();
+
+emptyList.shift();
+assert.deepStrictEqual(emptyList, new BufferList());
+
+assert.strictEqual(emptyList.join(','), '');
+
+assert.deepStrictEqual(emptyList.concat(0), Buffer.alloc(0));
+
+const buf = Buffer.from('foo');
+
+function testIterator(list, count) {
+  // test iterator
+  let len = 0;
+  // eslint-disable-next-line no-unused-vars
+  for (const x of list) {
+    len++;
+  }
+  assert.strictEqual(len, count);
+}
+
+// Test buffer list with one element.
+const list = new BufferList();
+testIterator(list, 0);
+
+list.push(buf);
+testIterator(list, 1);
+for (const x of list) {
+  assert.strictEqual(x, buf);
+}
+
+const copy = list.concat(3);
+testIterator(copy, 3);
+
+assert.notStrictEqual(copy, buf);
+assert.deepStrictEqual(copy, buf);
+
+assert.strictEqual(list.join(','), 'foo');
+
+const shifted = list.shift();
+testIterator(list, 0);
+assert.strictEqual(shifted, buf);
+assert.deepStrictEqual(list, new BufferList());
+
+{
+  const list = new BufferList();
+  list.push('foo');
+  list.push('bar');
+  list.push('foo');
+  list.push('bar');
+  assert.strictEqual(list.consume(6, true), 'foobar');
+  assert.strictEqual(list.consume(6, true), 'foobar');
+}
+
+{
+  const list = new BufferList();
+  list.push('foo');
+  list.push('bar');
+  assert.strictEqual(list.consume(5, true), 'fooba');
+}
+
+{
+  const list = new BufferList();
+  list.push(buf);
+  list.push(buf);
+  list.push(buf);
+  list.push(buf);
+  assert.strictEqual(list.consume(6).toString(), 'foofoo');
+  assert.strictEqual(list.consume(6).toString(), 'foofoo');
+}
+
+{
+  const list = new BufferList();
+  list.push(buf);
+  list.push(buf);
+  assert.strictEqual(list.consume(5).toString(), 'foofo');
+}