test: add test for Http2ServerResponse#[writableCorked,cork,uncork]

PR-URL: #33956
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-http2-res-corked.js

@@ -0,0 +1,54 @@
+'use strict';
+const common = require('../common');
+if (!common.hasCrypto) { common.skip('missing crypto'); }
+
+// Test for Http2ServerResponse#[writableCorked,cork,uncork]
+
+const { strictEqual } = require('assert');
+const http2 = require('http2');
+
+{
+  let corksLeft = 0;
+  const server = http2.createServer(common.mustCall((req, res) => {
+    strictEqual(res.writableCorked, corksLeft);
+    res.write(Buffer.from('1'.repeat(1024)));
+    res.cork();
+    corksLeft++;
+    strictEqual(res.writableCorked, corksLeft);
+    res.write(Buffer.from('1'.repeat(1024)));
+    res.cork();
+    corksLeft++;
+    strictEqual(res.writableCorked, corksLeft);
+    res.write(Buffer.from('1'.repeat(1024)));
+    res.cork();
+    corksLeft++;
+    strictEqual(res.writableCorked, corksLeft);
+    res.write(Buffer.from('1'.repeat(1024)));
+    res.cork();
+    corksLeft++;
+    strictEqual(res.writableCorked, corksLeft);
+    res.uncork();
+    corksLeft--;
+    strictEqual(res.writableCorked, corksLeft);
+    res.uncork();
+    corksLeft--;
+    strictEqual(res.writableCorked, corksLeft);
+    res.uncork();
+    corksLeft--;
+    strictEqual(res.writableCorked, corksLeft);
+    res.uncork();
+    corksLeft--;
+    strictEqual(res.writableCorked, corksLeft);
+    res.end();
+  }));
+  server.listen(0, common.mustCall(() => {
+    const URL = `http://localhost:${server.address().port}`;
+    const client = http2.connect(URL);
+    const req = client.request();
+    req.on('data', common.mustCall(2));
+    req.on('end', common.mustCall(() => {
+      server.close();
+      client.close();
+    }));
+  }));
+}