/**
  * @covers phpDocumentor\Descriptor\FileDescriptor::setSource
  * @covers phpDocumentor\Descriptor\FileDescriptor::getSource
  */
 public function testSetAndGetSource()
 {
     $this->assertSame(null, $this->fixture->getSource());
     $this->fixture->setSource(self::EXAMPLE_SOURCE);
     $this->assertSame(self::EXAMPLE_SOURCE, $this->fixture->getSource());
 }