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.


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');