test: increase coverage for timers

Add a test for cancelling timers with null or no arguments.

PR-URL: #10068
Reviewed-By: Myles Borins <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Roman Reiss <[email protected]>

Author: lrlna

test/parallel/test-timers-clear-null-does-not-throw-error.js

@@ -0,0 +1,18 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+
+// This test makes sure clearing timers with
+// 'null' or no input does not throw error
+
+assert.doesNotThrow(() => clearInterval(null));
+
+assert.doesNotThrow(() => clearInterval());
+
+assert.doesNotThrow(() => clearTimeout(null));
+
+assert.doesNotThrow(() => clearTimeout());
+
+assert.doesNotThrow(() => clearImmediate(null));
+
+assert.doesNotThrow(() => clearImmediate());