http2: remember sent headers

Add sentHeaders, sentTrailers, and sentInfoHeaders properties
on `Http2Stream`.

PR-URL: https://github.com/nodejs/node/pull/18045
Fixes: https://github.com/nodejs/node/issues/16619
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/test/parallel/test-http2-sent-headers.js b/test/parallel/test-http2-sent-headers.js
new file mode 100644
index 0000000000..bffa4d71c6
--- /dev/null
+++ b/test/parallel/test-http2-sent-headers.js
@@ -0,0 +1,47 @@
+'use strict';
+
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+const assert = require('assert');
+const h2 = require('http2');
+
+const server = h2.createServer();
+
+server.on('stream', common.mustCall((stream) => {
+  stream.additionalHeaders({ ':status': 102 });
+  assert.strictEqual(stream.sentInfoHeaders[0][':status'], 102);
+
+  stream.respond({ abc: 'xyz' }, {
+    getTrailers(headers) {
+      headers.xyz = 'abc';
+    }
+  });
+  assert.strictEqual(stream.sentHeaders.abc, 'xyz');
+  assert.strictEqual(stream.sentHeaders[':status'], 200);
+  assert.notStrictEqual(stream.sentHeaders.date, undefined);
+  stream.end();
+  stream.on('close', () => {
+    assert.strictEqual(stream.sentTrailers.xyz, 'abc');
+  });
+}));
+
+server.listen(0, common.mustCall(() => {
+  const client = h2.connect(`http://localhost:${server.address().port}`);
+  const req = client.request();
+
+  req.on('headers', common.mustCall((headers) => {
+    assert.strictEqual(headers[':status'], 102);
+  }));
+
+  assert.strictEqual(req.sentHeaders[':method'], 'GET');
+  assert.strictEqual(req.sentHeaders[':authority'],
+                     `localhost:${server.address().port}`);
+  assert.strictEqual(req.sentHeaders[':scheme'], 'http');
+  assert.strictEqual(req.sentHeaders[':path'], '/');
+  req.resume();
+  req.on('close', () => {
+    server.close();
+    client.close();
+  });
+}));