public function testMimeAliases()
 {
     $image_file_obj = new FileObject($this->getTestFileByBaseName('photo.jpg'));
     $text_file_obj = FileObject::createFromBuffer('test and stuff');
     $this->assertTrue($image_file_obj->isImage());
     $this->assertFalse($text_file_obj->isImage());
     $this->assertTrue($text_file_obj->isText());
     $this->assertFalse($image_file_obj->isText());
 }