public function testConstruct()
{
$object = new Group();
$this->assertEquals(0, $object->getOffsetX());
$this->assertEquals(0, $object->getOffsetY());
$this->assertEquals(0, $object->getExtentX());
$this->assertEquals(0, $object->getExtentY());
$this->assertEquals(0, $object->getShapeCollection()->count());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Group', $object->setWidth(rand(1, 100)));
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Group', $object->setHeight(rand(1, 100)));
}