1 files changed, 64 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-writableState-uncorked-bufferedRequestCount.js b/tests/node_compat/test/parallel/test-stream-writableState-uncorked-bufferedRequestCount.js
new file mode 100644
index 000000000..0320d1a5d
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-stream-writableState-uncorked-bufferedRequestCount.js
@@ -0,0 +1,64 @@
+// 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 assert = require('assert');
+const stream = require('stream');
+
+const writable = new stream.Writable();
+
+writable._writev = common.mustCall((chunks, cb) => {
+  assert.strictEqual(chunks.length, 2);
+  cb();
+}, 1);
+
+writable._write = common.mustCall((chunk, encoding, cb) => {
+  cb();
+}, 1);
+
+// first cork
+writable.cork();
+assert.strictEqual(writable._writableState.corked, 1);
+assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
+
+// cork again
+writable.cork();
+assert.strictEqual(writable._writableState.corked, 2);
+
+// The first chunk is buffered
+writable.write('first chunk');
+assert.strictEqual(writable._writableState.bufferedRequestCount, 1);
+
+// First uncork does nothing
+writable.uncork();
+assert.strictEqual(writable._writableState.corked, 1);
+assert.strictEqual(writable._writableState.bufferedRequestCount, 1);
+
+process.nextTick(uncork);
+
+// The second chunk is buffered, because we uncork at the end of tick
+writable.write('second chunk');
+assert.strictEqual(writable._writableState.corked, 1);
+assert.strictEqual(writable._writableState.bufferedRequestCount, 2);
+
+function uncork() {
+  // Second uncork flushes the buffer
+  writable.uncork();
+  assert.strictEqual(writable._writableState.corked, 0);
+  assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
+
+  // Verify that end() uncorks correctly
+  writable.cork();
+  writable.write('third chunk');
+  writable.end();
+
+  // End causes an uncork() as well
+  assert.strictEqual(writable._writableState.corked, 0);
+  assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
+}