public async Task Update_Book_Read_Dates()
{
var book = await BookHelpers.CreateValidBookWithAllProperties();
var repository = new BookRepository(_fixture.Context);
(await repository.ExistsAsync(book.Id)).Should().BeTrue();
var sut = await repository.LoadAsync(book.Id);
var bookId = sut.Id;
sut.Should().NotBeNull();
sut.ReadDates.Count.Should().Be(2);
var readDate1 = new BookReadDate(DateTime.Now);
var readDate2 = new BookReadDate(DateTime.Now);
var readDates = new List <BookReadDate> {
readDate1, readDate2
};
await BookHelpers.UpdateReadDates(sut.Id, readDates);
sut = await repository.LoadAsync(book.Id);
await _fixture.Context.Entry(sut).ReloadAsync();
sut.ReadDates.Count.Should().Be(4);
sut.Id.Should().Be(bookId);
}