public function testVisible() { $object = new Slide(); $this->assertTrue($object->isVisible()); $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Slide', $object->setIsVisible(false)); $this->assertFalse($object->isVisible()); $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Slide', $object->setIsVisible()); $this->assertTrue($object->isVisible()); }