true.md

layout	page-api
title	assert.true()
excerpt	A strict boolean true comparison.
groups	assert
redirect_from	/assert/true/
version_added	2.11.0

true( actual, message = "" )

A strict comparison that passes if the first argument is boolean true.

name	description
actual	Expression being tested
message (string)	Short description of the actual expression

true() requires just one argument. If the argument evaluates to true, the assertion passes; otherwise, it fails.

This method is similar to the assertTrue() method found in xUnit-style frameworks.

assert.false() can be used to explicitly test for a false value.

Examples

QUnit.test('example', assert => {
  // success
  assert.true(true, 'boolean true');

  // failure
  assert.true('foo', 'non-empty string');
  assert.true('', 'empty string');
  assert.true(0, 'number zero');
  assert.true(false, 'boolean false');
  assert.true(NaN, 'NaN value');
  assert.true(null, 'null value');
  assert.true(undefined, 'undefined value');
});