From 0c710daae29dd319b3cc6534d4577694443d114a Mon Sep 17 00:00:00 2001
From: Jithil P Ponnan <MrJithil@users.noreply.github.com>
Date: Thu, 19 Oct 2023 17:37:09 +1100
Subject: [PATCH] test: improve code coverage of diagnostics_channel
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test: improve code coverage of diagnostics_channel
PR-URL: https://github.com/nodejs/node/pull/50053
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
---
 ...tics-channel-tracing-channel-args-types.js | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 test/parallel/test-diagnostics-channel-tracing-channel-args-types.js

diff --git a/test/parallel/test-diagnostics-channel-tracing-channel-args-types.js b/test/parallel/test-diagnostics-channel-tracing-channel-args-types.js
new file mode 100644
index 00000000000000..5ae55badc4ac8e
--- /dev/null
+++ b/test/parallel/test-diagnostics-channel-tracing-channel-args-types.js
@@ -0,0 +1,39 @@
+'use strict';
+
+require('../common');
+const dc = require('diagnostics_channel');
+const assert = require('assert');
+
+let channel;
+
+// tracingChannel creating with name
+channel = dc.tracingChannel('test');
+assert.strictEqual(channel.start.name, 'tracing:test:start');
+
+// tracingChannel creating with channels
+channel = dc.tracingChannel({
+  start: dc.channel('tracing:test:start'),
+  end: dc.channel('tracing:test:end'),
+  asyncStart: dc.channel('tracing:test:asyncStart'),
+  asyncEnd: dc.channel('tracing:test:asyncEnd'),
+  error: dc.channel('tracing:test:error'),
+});
+
+// tracingChannel creating without nameOrChannels must throw TypeError
+assert.throws(() => (channel = dc.tracingChannel(0)), {
+  code: 'ERR_INVALID_ARG_TYPE',
+  name: 'TypeError',
+  message:
+    /The "nameOrChannels" argument must be of type string or an instance of Channel or Object/,
+});
+
+// tracingChannel creating without instance of Channel must throw error
+assert.throws(() => (channel = dc.tracingChannel({ start: '' })), {
+  code: 'ERR_INVALID_ARG_TYPE',
+  message: /The "nameOrChannels\.start" property must be an instance of Channel/,
+});
+
+// tracingChannel creating with empty nameOrChannels must throw error
+assert.throws(() => (channel = dc.tracingChannel({})), {
+  message: /Cannot convert undefined or null to object/,
+});