test: check allowed port argument values

Existing test only covered ports pass as options, add tests for
argument behaviour to avoid regressions.

Ref: #14205

test/parallel/test-net-listen-port-option.js

@@ -26,3 +26,33 @@ net.Server().listen({ port: '0' }, close);
     net.Server().listen({ port: port }, common.fail);
   }, /invalid listen argument/i);
 });
+
+// Repeat the tests, passing port as an argument, which validates somewhat
+// differently.
+
+net.Server().listen(undefined, close);
+net.Server().listen('0', close);
+
+// 'nan', skip, treated as a path, not a port
+//'+Infinity', skip, treated as a path, not a port
+//'-Infinity' skip, treated as a path, not a port
+
+// The numbers that are out of range are treated as 0
+net.Server().listen(-1, close);
+// Use a float larger than 1024, because EACCESS happens for low ports
+net.Server().listen(1234.56, close);
+net.Server().listen(0x10000, close);
+net.Server().listen(1 / 0, close);
+net.Server().listen(-1 / 0, close);
+
+// null is treated as 0
+net.Server().listen(null, close);
+
+// false/true are converted to 0/1, arguably a bug, but fixing would be
+// semver-major. Note that true fails because ports that low can't be listened
+// on by unprivileged processes.
+net.Server().listen(false, close);
+
+net.Server().listen(true).on('error', common.mustCall(function(err) {
+  assert.strictEqual(err.code, 'EACCES');
+}));