test: add known_test request with Unicode in the URL

This test currently fails. It illustrates that Unicode in the URL does
not arrive intact to the server, there is silent data corruption along
the way at some point.

This test is for the issue #13296.

PR-URL: #13297
Reviewed-By: James M Snell <jasnell@gmail.com>

test/known_issues/test-http-path-contains-unicode.js

@@ -0,0 +1,41 @@
+'use strict';
+const common = require('../common');
+
+// This test ensures that Unicode characters in the URL get handled correctly
+// by `http`
+// Refs: https://github.com/nodejs/node/issues/13296
+
+const assert = require('assert');
+const http = require('http');
+
+const expected = '/café🐶';
+
+assert.strictEqual(
+ expected,
+ '/caf\u{e9}\u{1f436}',
+ 'Sanity check that string literal produced the expected string'
+);
+
+const server = http.createServer(common.mustCall(function(req, res) {
+  assert.strictEqual(req.url, expected);
+  req.on('data', common.mustCall(function() {
+  })).on('end', common.mustCall(function() {
+    server.close();
+    res.writeHead(200);
+    res.end('hello world\n');
+  }));
+
+}));
+
+server.listen(0, function() {
+  http.request({
+    port: this.address().port,
+    path: expected,
+    method: 'GET'
+  }, common.mustCall(function(res) {
+    res.resume();
+  })).on('error', function(e) {
+    console.log(e.message);
+    process.exit(1);
+  }).end();
+});