public function testRotation()
{
$object = new RichText();
$value = rand(1, 100);
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\AbstractShape', $object->setRotation());
$this->assertEquals(0, $object->getRotation());
$this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\AbstractShape', $object->setRotation($value));
$this->assertEquals($value, $object->getRotation());
}