public function test_setGetShuffle_shouldReturnUnchangedValue()
 {
     // Arrange
     require_once './Modules/TestQuestionPool/classes/class.assClozeGap.php';
     $instance = new assClozeGap(0);
     // 0 - text gap
     $expected = true;
     // Act
     $instance->setShuffle($expected);
     $actual = $instance->getShuffle();
     // Assert
     $this->assertEquals($expected, $actual);
 }