public function testAdd()
{
$object = new Group();
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\Chart', $object->createChartShape());
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\Drawing', $object->createDrawingShape());
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\Line', $object->createLineShape(10, 10, 10, 10));
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\RichText', $object->createRichTextShape());
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\Table', $object->createTableShape());
$this->assertEquals(5, $object->getShapeCollection()->count());
}
