From 9970d562c65af98fee5bae28a5f956ed6238187c Mon Sep 17 00:00:00 2001
From: Petar Dodev <petar.dodev@gmail.com>
Date: Tue, 6 Nov 2018 18:36:17 +0300
Subject: [PATCH] test: test add and remove for lib/domain

Testing some of the more specific cases of using domain.add and
domain.remove. For example, calling domain.add twice with same event
emmiter and actually removing an event emitter from the domain.

PR-URL: https://github.com/nodejs/node/pull/24163
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
---
 test/parallel/test-domain-add-remove.js | 26 +++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 test/parallel/test-domain-add-remove.js

diff --git a/test/parallel/test-domain-add-remove.js b/test/parallel/test-domain-add-remove.js
new file mode 100644
index 00000000000000..8e1d082125cb0b
--- /dev/null
+++ b/test/parallel/test-domain-add-remove.js
@@ -0,0 +1,26 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+const domain = require('domain');
+const EventEmitter = require('events');
+
+const d = new domain.Domain();
+const e = new EventEmitter();
+const e2 = new EventEmitter();
+
+d.add(e);
+assert.strictEqual(e.domain, d);
+
+// Adding the same event to a domain should not change the member count
+let previousMemberCount = d.members.length;
+d.add(e);
+assert.strictEqual(previousMemberCount, d.members.length);
+
+d.add(e2);
+assert.strictEqual(e2.domain, d);
+
+previousMemberCount = d.members.length;
+d.remove(e2);
+assert.notStrictEqual(e2.domain, d);
+assert.strictEqual(previousMemberCount - 1, d.members.length);