notStrictEqual.md

layout	page-api
title	assert.notStrictEqual()
excerpt	A strict comparison, checking for inequality.
groups	assert
redirect_from	/assert/notStrictEqual/ /notStrictEqual/
version_added	1.0.0

notStrictEqual( actual, expected, message = "" )

A strict comparison, checking for inequality.

name	description
actual	Expression being tested
expected	Known comparison value
message (string)	Short description

The notStrictEqual assertion uses the strict inverted comparison operator (!==) to compare the actual and expected arguments. When they aren't equal, the assertion passes; otherwise, it fails. When it fails, both actual and expected values are displayed in the test result, in addition to a given message.

assert.equal() can be used to test equality.

assert.strictEqual() can be used to test strict equality.

Examples

QUnit.test('example', assert => {
  const result = '2';

  // succeeds, while the number 2 and string 2 are similar, they are strictly different.
  assert.notStrictEqual(result, 2);
});