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-rw-r--r--test/parallel/test-util-sleep.js19
1 files changed, 19 insertions, 0 deletions
diff --git a/test/parallel/test-util-sleep.js b/test/parallel/test-util-sleep.js
new file mode 100644
index 0000000000..e4cc62b8e0
--- /dev/null
+++ b/test/parallel/test-util-sleep.js
@@ -0,0 +1,19 @@
+// Flags: --expose-internals
+'use strict';
+require('../common');
+const assert = require('assert');
+const { sleep } = require('internal/util');
+
+[undefined, null, '', {}, true, false].forEach((value) => {
+ assert.throws(
+ () => { sleep(value); },
+ /The "msec" argument must be of type number/
+ );
+});
+
+[-1, 3.14, NaN, 4294967296].forEach((value) => {
+ assert.throws(
+ () => { sleep(value); },
+ /The value of "msec" is out of range/
+ );
+});