test: harden test-dgram-bind-shared-ports

* add `mustCall` and `mustNotCall` to all callbacks
* added `known_issue` for port binding

PR-URL: https://github.com/nodejs/node/pull/13100
Refs: https://github.com/nodejs/node/issues/13055
Refs: https://github.com/nodejs/node/pull/12999
Refs: https://github.com/nodejs/node/issues/13526
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/test/known_issues/test-dgram-bind-shared-ports-after-port-0.js b/test/known_issues/test-dgram-bind-shared-ports-after-port-0.js
new file mode 100644
index 0000000000..7b750c765b
--- /dev/null
+++ b/test/known_issues/test-dgram-bind-shared-ports-after-port-0.js
@@ -0,0 +1,56 @@
+'use strict';
+const common = require('../common');
+
+// This test should fail because at present `cluster` does not know how to share
+// a socket when `worker1` binds with `port: 0`, and others try to bind to the
+// assigned port number from `worker1`
+//
+// *Note*: since this is a `known_issue` we try to swallow all errors except
+// the one we are interested in
+
+const assert = require('assert');
+const cluster = require('cluster');
+const dgram = require('dgram');
+const BYE = 'bye';
+
+if (cluster.isMaster) {
+  const worker1 = cluster.fork();
+
+  // verify that Windows doesn't support this scenario
+  worker1.on('error', (err) => {
+    if (err.code === 'ENOTSUP') throw err;
+  });
+
+  worker1.on('message', (msg) => {
+    if (typeof msg !== 'object') process.exit(0);
+    if (msg.message !== 'success') process.exit(0);
+    if (typeof msg.port1 !== 'number') process.exit(0);
+
+    const worker2 = cluster.fork({ PRT1: msg.port1 });
+    worker2.on('message', () => process.exit(0));
+    worker2.on('exit', (code, signal) => {
+      // this is the droid we are looking for
+      assert.strictEqual(code, 0);
+      assert.strictEqual(signal, null);
+    });
+
+    // cleanup anyway
+    process.on('exit', () => {
+      worker1.send(BYE);
+      worker2.send(BYE);
+    });
+  });
+  // end master code
+} else {
+  // worker code
+  process.on('message', (msg) => msg === BYE && process.exit(0));
+
+  // first worker will bind to '0', second will try the assigned port and fail
+  const PRT1 = process.env.PRT1 || 0;
+  const socket1 = dgram.createSocket('udp4', () => {});
+  socket1.on('error', PRT1 === 0 ? () => {} : assert.fail);
+  socket1.bind(
+    { address: common.localhostIPv4, port: PRT1, exclusive: false },
+    () => process.send({ message: 'success', port1: socket1.address().port })
+  );
+}