/**
  * Test can read
  */
 public function testConstruct()
 {
     $object = new MemoryDrawing();
     $this->assertEquals('imagepng', $object->getRenderingFunction());
     $this->assertEquals(MemoryDrawing::MIMETYPE_DEFAULT, $object->getMimeType());
     $this->assertNull($object->getImageResource());
     $this->assertInternalType('string', $object->getIndexedFilename());
     $this->assertInternalType('string', $object->getExtension());
     $this->assertInternalType('string', $object->getHashCode());
 }