- "epub": "https://example.com/media/epub/parent.epub",
- "cover_thumb": "https://example.com/media/cover/parent.jpg-139x193",
- "mobi": "https://example.com/media/mobi/parent.mobi",
- "url": "https://example.com/katalog/lektura/parent/",
- "cover": "https://example.com/media/cover/parent.jpg",
- "pdf": "https://example.com/media/pdf/parent.pdf",
- "simple_thumb": "https://example.com/media/cover_api_thumb/parent.jpg"
+ "epub": "http://testserver/media/epub/parent.epub",
+ "cover_thumb": "http://testserver/media/cover/parent.jpg-139x193",
+ "mobi": "http://testserver/media/mobi/parent.mobi",
+ "url": "http://testserver/katalog/lektura/parent/",
+ "cover": "http://testserver/media/cover/parent.jpg",
+ "pdf": "http://testserver/media/pdf/parent.pdf",
+ "simple_thumb": "http://testserver/media/cover_api_thumb/parent.jpg",
+ "isbn_epub": null,
+ "isbn_mobi": null,
+ "isbn_pdf": null