public async Task CanLoanBook()
{
var options = new DbContextOptionsBuilder <ApplicationDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString())
.EnableSensitiveDataLogging()
.Options;
await using var context = new ApplicationDbContext(options);
var userId = Guid.NewGuid().ToString();
const int bookId = -1;
context.Books.Add(new Book("foo", "bar", "test book")
{
ID = bookId
});
context.Users.Add(new User {
UserName = "******", ID = userId
});
await context.SaveChangesAsync();
var service = new BookShelfService(context);
var user = await service.FindUserAsync(userId);
var book = await service.FindBookAsync(bookId);
await service.RegisterLoanAsync(book, user);
var exists = await context.Loans.AnyAsync(l => l.Book == book && l.User == user);
Assert.True(exists);
}
public async Task Loan([FromRoute] int bookId)
{
var currentUserName = User.FindFirst(ClaimTypes.Name).Value;
if (currentUserName == null)
{
throw new InvalidOperationException("User does not have a Name/ID");
}
var user = await _bookShelfService.FindUserAsync(currentUserName);
var book = await _bookShelfService.FindBookAsync(bookId);
if (book.Loan != null)
{
throw new InvalidOperationException($"Book is already loaned by {book.Loan.User.Name}.");
}
await _bookShelfService.RegisterLoanAsync(book, user);
}