public function testBarGrouping()
{
$object = new Bar3D();
$this->assertEquals(Bar3D::GROUPING_CLUSTERED, $object->getBarGrouping());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Bar3D', $object->setBarGrouping(Bar3D::GROUPING_CLUSTERED));
$this->assertEquals(Bar3D::GROUPING_CLUSTERED, $object->getBarGrouping());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Bar3D', $object->setBarGrouping(Bar3D::GROUPING_STACKED));
$this->assertEquals(Bar3D::GROUPING_STACKED, $object->getBarGrouping());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Type\\Bar3D', $object->setBarGrouping(Bar3D::GROUPING_PERCENTSTACKED));
$this->assertEquals(Bar3D::GROUPING_PERCENTSTACKED, $object->getBarGrouping());
}