public void TestBookCountAuthorsOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var books = context.Books
.Include(r => r.AuthorsLink)
.ThenInclude(r => r.Author)
.ToList();
//VERIFY
books.Count.ShouldEqual(4);
books.SelectMany(x => x.AuthorsLink.Select(y => y.Author)).Distinct().Count().ShouldEqual(3);
}
}
public async Task TestUpdateViaStatedMethodBad()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var utData = context.SetupSingleDtoAndEntities <Tests.Dtos.ChangePubDateDto>();
var service = new CrudServicesAsync(context, utData.ConfigAndMapper, new CreateNewDBContextHelper(() => new EfCoreContext(options)));
//ATTEMPT
var dto = new Tests.Dtos.ChangePubDateDto {
BookId = 4, PublishedOn = new DateTime(2000, 1, 1)
};
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => service.UpdateAndSaveAsync(dto, nameof(Book.AddReview)));
//VERIFY
ex.Message.ShouldStartWith("Could not find a method of name AddReview. The method that fit the properties in the DTO/VM are:");
}
}
public void ExampleIdentityResolutionBad()
{
//SETUP
var options = SqliteInMemory
.CreateOptions <EfCoreContext>();
using var context = new EfCoreContext(options);
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
//ATTEMPT
var book = context.Books.First();
book.Price = 123;
// Should call context.SaveChanges()
//VERIFY
var verifyBook = context.Books.First();
//!!! THIS IS WRONG !!! THIS IS WRONG
verifyBook.Price.ShouldEqual(123);
}
public void TestReadBookWithInclude()
{
//SETUP
int bookId;
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
bookId = context.Books.Single(x => x.Reviews.Any()).BookId;
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var bookWithReviews = context.Books
.Include(x => x.Reviews)
.Single(x => x.BookId == bookId);
//VERIFY
bookWithReviews.Reviews.Count.ShouldEqual(2);
}
}
public void TestReadEachSeparately()
{
//SETUP
int bookId;
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using var context = new EfCoreContext(options);
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
bookId = context.Books.Single(x => x.Reviews.Any()).BookId;
context.ChangeTracker.Clear();
//ATTEMPT
var book = context.Books.ToList();
var reviews = context.Set <Review>().ToList();
var authorsLinks = context.Set <BookAuthor>().ToList();
var authors = context.Authors.ToList();
//VERIFY
book.Last().Reviews.Count.ShouldEqual(2);
book.Last().AuthorsLink.Single().Author.ShouldNotBeNull();
}
public void TestIncludeThenTwoLevelManuallyLoad()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var includeStrings = typeof(AddNewAuthorToBookUsingIncludesDto)
.GetCustomAttributes(typeof(IncludeThenAttribute), true).Cast <IncludeThenAttribute>()
.Select(x => x.IncludeNames).ToList();
//ATTEMPT
var query = ApplyAnyIncludeStringsAtDbSetLevel <AddReviewWithIncludeDto>(context.Books);
var books = query.ToList();
//VERIFY
var names = books.SelectMany(x => x.AuthorsLink.Select(y => y.Author.Name)).ToArray();
names.ShouldEqual(new string[] { "Martin Fowler", "Martin Fowler", "Eric Evans", "Future Person" });
}
}
public void TestReadJustBookTableOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options)
) //dispose first DbContext and create new one. That way the read isn't effected by the setup code
{
//ATTEMPT
var book = context.Books.First();
//VERIFY
book.AuthorsLink.ShouldBeNull();
book.Reviews.ShouldBeNull();
book.Promotion.ShouldBeNull();
}
}
public void TestAddReviewToBookNoIncludeOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var book = context.Books.First();
book.AddReview(5, "comment", "user", context);
context.SaveChanges();
//VERIFY
book.Reviews.Count().ShouldEqual(1);
context.Set <Review>().Count().ShouldEqual(3);
}
}
public void TestRemoveReviewBookOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var book = context.Books.Include(x => x.Reviews).Single(x => x.Reviews.Count() == 2);
book.RemoveReview(book.Reviews.LastOrDefault());
context.SaveChanges();
//VERIFY
book.Reviews.Count().ShouldEqual(1);
context.Set <Review>().Count().ShouldEqual(1);
}
}
public void TestAddPromotionBookOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var book = context.Books.First();
var status = book.AddPromotion(book.OrgPrice / 2, "Half price today");
context.SaveChanges();
//VERIFY
status.HasErrors.ShouldBeFalse();
book.ActualPrice.ShouldEqual(book.OrgPrice / 2);
}
}
public async Task TestProjectBookTitleManyWithConfigOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var utData = context.SetupSingleDtoAndEntities <BookTitleAndCount>();
var service = new CrudServices(context, utData.Wrapped);
//ATTEMPT
var list = await service.ReadManyNoTracked <BookTitleAndCount>().ToListAsync();
//VERIFY
service.IsValid.ShouldBeTrue(service.GetAllErrors());
list.Count.ShouldEqual(4);
list.Select(x => x.Title).ShouldEqual(new[] { "Refactoring", "Patterns of Enterprise Application Architecture", "Domain-Driven Design", "Quantum Networking" });
list.Select(x => x.ReviewsCount).ShouldEqual(new [] { 0, 0, 0, 2 });
}
}
public void TestDirectSelectBookListDtoOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using var context = new EfCoreContext(options);
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
//ATTEMPT
var dtos = context.Books.Select(p => new BookListDto
{
BookId = p.BookId,
Title = p.Title,
Price = p.Price,
PublishedOn = p.PublishedOn,
}).ToList();
//VERIFY
dtos.Last().BookId.ShouldNotEqual(0);
dtos.Last().Title.ShouldNotBeNull();
dtos.Last().Price.ShouldNotEqual(0);
}
public void TestProjectBookTitleManyOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var utData = context.SetupSingleDtoAndEntities <BookTitle>();
var service = new CrudServices(context, utData.ConfigAndMapper);
//ATTEMPT
var list = service.ReadManyWithPreQueryNoTracked <Book, BookTitle>(books =>
books.Where(x => x.AuthorsLink.Select(y => y.Author.Name).Contains("Martin Fowler"))).ToList();
//VERIFY
service.IsValid.ShouldBeTrue(service.GetAllErrors());
list.Count.ShouldEqual(2);
list.Select(x => x.Title).ShouldEqual(new [] { "Refactoring", "Patterns of Enterprise Application Architecture" });
}
}
public void UpdateAuthorBadId()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
//ATTEMPT
var author = new Author
{
AuthorId = 999999,
Name = "Future Person 2"
};
context.Authors.Update(author);
var ex = Assert.Throws <DbUpdateConcurrencyException>(() => context.SaveChanges());
//VERIFY
ex.Message.StartsWith("Database operation expected to affect 1 row(s) but actually affected 0 row(s).").ShouldBeTrue();
}
}
public void TestAddExtraAuthorOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
//ATTEMPT
var book = context.Books
.Include(p => p.AuthorsLink)
.Single(p => p.Title == "Quantum Networking");
var newAuthor = context.Authors
.Single(p => p.Name == "Martin Fowler");
book.AuthorsLink.Add(new BookAuthor
{
Book = book,
Author = newAuthor,
Order = (byte)book.AuthorsLink.Count
});
context.SaveChanges();
//VERIFY
var bookAgain = context.Books
.Include(p => p.AuthorsLink)
.Single(p => p.BookId == book.BookId);
bookAgain.AuthorsLink.ShouldNotBeNull();
bookAgain.AuthorsLink.Count.ShouldEqual(2);
var authorsInOrder = bookAgain.AuthorsLink.OrderBy(p => p.Order).ToList();
authorsInOrder.First().Author.Name.ShouldEqual("Future Person");
authorsInOrder.Last().Author.Name.ShouldEqual("Martin Fowler");
}
}
public void TestConnectedUpdateNoExistingRelationshipOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using var context = new EfCoreContext(options);
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
//ATTEMPT
//NOTE: I know that the first book does not have a review!
var book = context.Books //#A
.Include(p => p.Reviews) //#A
.First(); //#A
book.Reviews.Add(new Review //#B
{ //#B
VoterName = "Unit Test", //#B
NumStars = 5, //#B
Comment = "Great book!" //#B
}); //#B
context.SaveChanges(); //#C
/**********************************************************
#A This finds the first book and loads it with any reviews it might have
#B I add a new review to this book
#C The SaveChanges method calls DetectChanges, which finds that the Reviews property has changed, and from there finds the new Review, which it adds to the Review table
* *******************************************************/
//VERIFY
var bookAgain = context.Books
.Include(p => p.Reviews)
.Single(p => p.BookId == book.BookId);
bookAgain.Reviews.ShouldNotBeNull();
bookAgain.Reviews.Count.ShouldEqual(1);
}
public void TestConnectedUpdateNoExistingRelationshipOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
//ATTEMPT
var book = context.Books //#A
.Include(p => p.Promotion) //#B
.First(p => p.Promotion == null);
book.Promotion = new PriceOffer //#C
{ //#C
NewPrice = book.Price / 2, //#C
PromotionalText = "Half price today!" //#C
}; //#C
context.SaveChanges(); //#D
/**********************************************************
#A Finds a book. In this example it doesn’t have an existing promotion, but it would also work if there was an existing promotion
#B While the include isn't needed because I am loading something without a Promotion it is good practice to include it, as you should load any any relationships if you are going to change a relationship
#C I add a new PriceOffer to this book
#D The SaveChanges method calls DetectChanges, which find that the Promotion property has changed, so it adds that entry to the PricerOffers table
* *******************************************************/
//VERIFY
var bookAgain = context.Books
.Include(p => p.Promotion)
.Single(p => p.BookId == book.BookId);
bookAgain.Promotion.ShouldNotBeNull();
bookAgain.Promotion.PromotionalText.ShouldEqual("Half price today!");
}
}
public void TestDeleteBookInLineItemFails()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using var context = new EfCoreContext(options);
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var userId = Guid.NewGuid();
var order = new Order
{
CustomerId = userId,
LineItems = new List <LineItem>
{
new LineItem
{
ChosenBook = context.Books.First(),
LineNum = 0,
BookPrice = 123,
NumBooks = 1
}
}
};
context.Orders.Add(order);
context.SaveChanges();
context.ChangeTracker.Clear();
//ATTEMPT
context.Books.Remove(context.Books.First());
var ex = Assert.Throws <DbUpdateException>(() => context.SaveChanges());
//VERIFY
ex.InnerException.Message.ShouldEqual("SQLite Error 19: 'FOREIGN KEY constraint failed'.");
}
public void TestLoadOnlyBookAndDelete()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var book = context.Books
.Single(p => p.Title == "Quantum Networking");
context.Remove(book);
context.SaveChanges();
//VERIFY
context.Books.Count().ShouldEqual(3);
context.Set <BookAuthor>().Count().ShouldEqual(3);
context.Set <Review>().Count().ShouldEqual(0);
}
}
public async Task TestProjectSingleWhereBad()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var utData = context.SetupSingleDtoAndEntities <BookTitleAndCount>();
var service = new CrudServicesAsync(context, utData.ConfigAndMapper);
//ATTEMPT
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => service.ReadSingleAsync <BookTitleAndCount>(x => true));
//VERIFY
#if NETCOREAPP2_1
ex.Message.ShouldEqual("Source sequence contains more than one element.");
#elif NETCOREAPP3_0
ex.Message.ShouldEqual("Enumerator failed to MoveNextAsync.");
#endif
}
}
public void TestComplexAutoMapperOk()
{
//SETUP
var showLog = false;
var options = SqliteInMemory.CreateOptionsWithLogging <EfCoreContext>(log =>
{
if (showLog)
{
_output.WriteLine(log.Message);
}
});
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
var lastBook = context.SeedDatabaseFourBooks().Last();
var config = CreateFromProfileConfig();
//ATTEMPT
showLog = true;
var dto = context.Books
.ProjectTo <BookListDto>(config)
.Single(x => x.BookId == lastBook.BookId);
//VERIFY
dto.BookId.ShouldEqual(lastBook.BookId);
dto.Title.ShouldEqual(lastBook.Title);
dto.PublishedOn.ShouldEqual(lastBook.PublishedOn);
dto.Price.ShouldEqual(lastBook.Price);
dto.ActualPrice.ShouldEqual(lastBook.Promotion.NewPrice);
dto.PromotionPromotionalText.ShouldEqual(lastBook.Promotion.PromotionalText);
dto.AuthorsOrdered.ShouldEqual("Future Person");
dto.ReviewsCount.ShouldEqual(2);
dto.ReviewsAverageVotes.ShouldEqual(5.0);
}
}
public void ValidateOk()
{
//SETUP
var userId = Guid.NewGuid();
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options, new FakeUserIdService(userId)))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options, new FakeUserIdService(userId)))
{
//ATTEMPT
var order = new Order
{
CustomerId = userId,
LineItems = new List <LineItem>
{
new LineItem
{
BookId = context.Books.First().BookId,
LineNum = 1,
BookPrice = 123,
NumBooks = 1
}
}
};
context.Orders.Add(order);
var errors = context.SaveChangesWithValidation();
//VERIFY
errors.Any().ShouldBeFalse();
context.Orders.Count().ShouldEqual(1);
}
}
public void TestAddOrderNoAcceptBad()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var service = new PlaceOrderAction(new PlaceOrderDbAccess(context));
var dto = new PlaceOrderInDto
{
AcceptTAndCs = false,
};
//ATTEMPT
var order = service.BizAction(dto);
//VERIFY
service.HasErrors.ShouldBeTrue();
service.Errors.Single().ErrorResult.ErrorMessage.ShouldEqual("You must accept the T&Cs to place an order.");
}
}
public void TestPlaceOrderBad()
{
//SETUP
var options = EfInMemory.CreateNewContextOptions();
using (var context = new EfCoreContext(options))
{
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
var mockCookieRequests = new MockHttpCookieAccess(CheckoutCookie.CheckoutCookieName, $"{Guid.NewGuid()},1,2");
var service = new PlaceOrderService(mockCookieRequests.CookiesIn, mockCookieRequests.CookiesOut, context);
//ATTEMPT
var orderId = service.PlaceOrder(false);
context.SaveChanges();
//VERIFY
orderId.ShouldEqual(0);
service.Errors.Count.ShouldEqual(1);
service.Errors.First().ErrorMessage.ShouldEqual("You must accept the T&Cs to place an order.");
}
}
public void TestReadSingleWhereNullIsError(int bookId, bool shouldBeValid)
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var utData = context.SetupSingleDtoAndEntities <BookTitle>();
var service = new CrudServices(context, utData.ConfigAndMapper);
//ATTEMPT
var book = service.ReadSingle <Book>(x => x.BookId == bookId);
//VERIFY
service.IsValid.ShouldEqual(shouldBeValid);
if (!service.IsValid)
{
service.GetAllErrors().ShouldEqual("Sorry, I could not find the Book you were looking for.");
}
}
}
public void TestPlaceOrderBad()
{
//SETUP
var userId = Guid.NewGuid();
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options, new FakeUserIdService(userId)))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
var mockCookieRequests = new MockHttpCookieAccess(BasketCookie.BasketCookieName, $"{Guid.NewGuid()},1,2");
var service = new PlaceOrderServiceTransact(mockCookieRequests.CookiesIn, mockCookieRequests.CookiesOut, context);
//ATTEMPT
var orderId = service.PlaceOrder(false);
context.SaveChanges();
//VERIFY
orderId.ShouldEqual(0);
service.Errors.Count.ShouldEqual(1);
service.Errors.First().ErrorMessage.ShouldEqual("You must accept the T&Cs to place an order.");
}
}
public void TestEagerLoadBookAllOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using var context = new EfCoreContext(options);
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
context.ChangeTracker.Clear();
//ATTEMPT
var firstBook = context.Books
.Include(book => book.AuthorsLink) //#A
.ThenInclude(bookAuthor => bookAuthor.Author) //#B
.Include(book => book.Reviews) //#C
.Include(book => book.Tags) //#D
.Include(book => book.Promotion) //#E
.First(); //#F
/*********************************************************
#A The first Include() gets a collection of BookAuthor
#B The ThenInclude() gets the next link, in this case the link to the Author
#C The Include() gets a collection of Reviews, which may be an empty collection
#D This loads the Tags. Note that this directly accesses the Tags
#E This loads any optional PriceOffer class, if one is assigned
#F This takes the first book
* *******************************************************/
//VERIFY
firstBook.AuthorsLink.ShouldNotBeNull();
firstBook.AuthorsLink.First()
.Author.ShouldNotBeNull();
firstBook.Reviews.ShouldNotBeNull();
}
public void TestCallUpdateBookWithExistingAuthorWithTwoIncludes()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
var bookSeeded = context.SeedDatabaseFourBooks();
var bookId = bookSeeded.First().BookId;
var authorId = bookSeeded.Last().AuthorsLink.First().AuthorId;
context.ChangeTracker.Clear();
var utData = context.SetupSingleDtoAndEntities <AddNewAuthorToBookUsingIncludesDto>();
var service = new CrudServices(context, utData.ConfigAndMapper);
//ATTEMPT
var dto = new AddNewAuthorToBookUsingIncludesDto
{
BookId = bookId,
AddThisAuthor = context.Authors.SingleOrDefault(x => x.AuthorId == authorId),
Order = 2
};
service.UpdateAndSave(dto);
//VERIFY
service.IsValid.ShouldBeTrue(service.GetAllErrors());
service.Message.ShouldEqual("Successfully updated the Book");
var bookAuthorsName = context.Books
.Where(x => x.BookId == bookId)
.SelectMany(x => x.AuthorsLink.Select(y => y.Author.Name))
.ToArray();
bookAuthorsName.ShouldEqual(new string[] { "Martin Fowler", "Future Person" });
}
}
public void TestEagerLoadBookAllOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//ATTEMPT
var book = context.Books
.Include(r => r.AuthorsLink) //#A
.ThenInclude(r => r.Author) //#B
.Include(r => r.Reviews) //#C
.Include(r => r.Promotion) //#D
.First(); //#E
/*********************************************************
#A The first Include() gets a collection of BookAuthor
#B The ThenInclude() gets the next link, in this case the link to the Author
#C The Include() gets a collection of Reviews, which may be an empty collection
#D This loads any optional PriceOffer class, if one is assigned
#E This takes the first book
* *******************************************************/
//VERIFY
book.AuthorsLink.ShouldNotBeNull();
book.AuthorsLink.First()
.Author.ShouldNotBeNull();
book.Reviews.ShouldNotBeNull();
}
}
public void TestCreateBookWithExistingAuthor_CheckThreeStagesOk()
{
//SETUP
var options = SqliteInMemory.CreateOptions <EfCoreContext>();
using (var context = new EfCoreContext(options))
{
context.Database.EnsureCreated();
context.SeedDatabaseFourBooks();
}
using (var context = new EfCoreContext(options))
{
//STAGE1
var author = context.Authors.First();
var bookAuthor = new BookAuthor {
Author = author
};
var book = new Book
{
Title = "Test Book",
AuthorsLink = new List <BookAuthor> {
bookAuthor
}
};
//Read the states
context.Entry(author).State.ShouldEqual(EntityState.Unchanged);
context.Entry(bookAuthor).State.ShouldEqual(EntityState.Detached);
context.Entry(book).State.ShouldEqual(EntityState.Detached);
//These navigational links have not been set up
book.AuthorsLink.Single().Book.ShouldBeNull();
author.BooksLink.ShouldBeNull();
//tracked PK/FK values not set
context.Entry(book).Property(nameof(Book.BookId)).CurrentValue.ShouldEqual(0);
context.Entry(bookAuthor).Property(nameof(BookAuthor.BookId)).CurrentValue.ShouldEqual(0);
context.Entry(bookAuthor).Property(nameof(BookAuthor.AuthorId)).CurrentValue.ShouldEqual(0);
//STAGE2
context.Add(book);
//Read the states
context.Entry(author).State.ShouldEqual(EntityState.Unchanged);
context.Entry(bookAuthor).State.ShouldEqual(EntityState.Added);
context.Entry(book).State.ShouldEqual(EntityState.Added);
//Extra Navigational links filled in after call to Add
book.AuthorsLink.Single().Book.ShouldEqual(book);
author.BooksLink.Single().ShouldEqual(book.AuthorsLink.Single());
//Real PKs/FKs
book.BookId.ShouldEqual(0);
book.AuthorsLink.Single().BookId.ShouldEqual(0);
book.AuthorsLink.Single().AuthorId.ShouldEqual(author.AuthorId);
//tracked PK/FK values of new entities should be negative for Added classes, or actual PK if read in/Unchanged
var tempBookId = (int)context.Entry(bookAuthor).Property(nameof(BookAuthor.BookId)).CurrentValue;
(tempBookId < 0).ShouldBeTrue();
context.Entry(book).Property(nameof(Book.BookId)).CurrentValue.ShouldEqual(tempBookId);
((int)context.Entry(bookAuthor).Property(nameof(BookAuthor.AuthorId)).CurrentValue).ShouldEqual(author.AuthorId);
//STAGE3
context.SaveChanges();
context.Entry(author).State.ShouldEqual(EntityState.Unchanged);
context.Entry(bookAuthor).State.ShouldEqual(EntityState.Unchanged);
context.Entry(book).State.ShouldEqual(EntityState.Unchanged);
book.BookId.ShouldEqual(5);
book.AuthorsLink.Single().BookId.ShouldEqual(book.BookId);
book.AuthorsLink.Single().AuthorId.ShouldEqual(author.AuthorId);
}
}