Implement test-http2-client-port-80.js (#19267)

src/js/node/http2.ts

@@ -3230,13 +3230,13 @@ class ClientHttp2Session extends Http2Session {
         options
           ? {
               host: url.hostname,
-              port,
+              port: String(port),
               ALPNProtocols: ["h2"],
               ...options,
             }
           : {
               host: url.hostname,
-              port,
+              port: String(port),
               ALPNProtocols: ["h2"],
             },
         onConnect.bind(this),

test/js/node/test/parallel/test-http2-client-port-80.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+const assert = require('assert');
+const http2 = require('http2');
+const net = require('net');
+
+// Verifies that port 80 gets set as expected
+
+const connect = net.connect;
+net.connect = common.mustCall((...args) => {
+  assert.strictEqual(args[0].port, '80');
+  return connect(...args);
+});
+
+const client = http2.connect('http://localhost:80');
+
+// A socket error may or may not occur depending on whether there is something
+// currently listening on port 80. Keep this as a non-op and not a mustCall or
+// mustNotCall.
+client.on('error', () => {});
+
+client.close();