node: fix test-http2-client-promisify-connect-error.js (#22355)

Author: nektro

test/js/node/test/parallel/test-http2-client-promisify-connect-error.js

@@ -0,0 +1,22 @@
+'use strict';
+
+const common = require('../common');
+
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+const assert = require('assert');
+const http2 = require('http2');
+const util = require('util');
+
+const connect = util.promisify(http2.connect);
+
+const error = new Error('Unable to resolve hostname');
+
+function lookup(hostname, options, callback) {
+  callback(error);
+}
+
+assert.rejects(
+  connect('http://hostname', { lookup }),
+  error,
+).then(common.mustCall());