private void ChangeNameAndCheck(TemporaryFolder newFolder, BookStorage storage)
{
var newBookName = Path.GetFileName(newFolder.Path);
storage.SetBookName(newBookName);
var newPath = newFolder.Combine(newBookName + ".htm");
Assert.IsTrue(Directory.Exists(newFolder.Path), "Expected folder:" + newFolder.Path);
Assert.IsTrue(File.Exists(newPath), "Expected file:" + newPath);
}