true.md

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