public async Task ReturnsABook()
{
var isbn = "0765326353";
var bookId = 7235533;
var book = await BooksClient.GetByIsbn(isbn);
Assert.NotNull(book);
Assert.Equal(book.Isbn, isbn);
Assert.Equal(book.Id, bookId);
}
public async Task ReturnsNullIfNotFound()
{
var book = await BooksClient.GetByIsbn("test");
Assert.Null(book);
}