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