public void TestISBNWrongLenght()
{
var bookAPI = new BookAPI(null, null);
Assert.IsFalse(bookAPI.ValidateISBN(978015608321));
}
public void TestISBNCorrect()
{
var bookAPI = new BookAPI(null, null);
Assert.IsTrue(bookAPI.ValidateISBN(9780136083221));
}