public async Task AddAsync__In_resource_exists_the_same_ticket_but_with_different_ticket_id__Should_throw_InvalidOperationException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets.Add(_validTicket);
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
var ticket = _validTicket.Clone() as Ticket;
// Assign existing customer, discount, ticket tariff and sightseeing group to the ticket to be added, based on their Ids.
// Each ticket is a child of mentioned entities and cannot exist without their.
// Moreover, it is impossible to add a new parent by adding a ticket that references a non-existent parent.
// In this case, an exception will be thrown.
ticket.Customer = await context.Customers.SingleAsync(x => x.Id.Equals(_validTicket.Customer.Id));
ticket.Discount = await context.Discounts.SingleAsync(x => x.Id.Equals(_validTicket.Discount.Id));
ticket.Tariff = await context.TicketTariffs.SingleAsync(x => x.Id.Equals(_validTicket.Tariff.Id));
ticket.Group = await context.Groups.SingleAsync(x => x.Id.Equals(_validTicket.Group.Id));
Func <Task> action = async() => await service.AddAsync(ticket);
await action.Should().ThrowExactlyAsync <InvalidOperationException>("Because in resource exists the Ticket with the same id as this one to be added.");
}
}
}
public async Task AddAsync__In_resource_exists_the_same_ticket_but_with_different_ticket_id_and_id__Should_add_this_ticket_successful()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets.Add(_validTicket);
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
var ticket = _validTicket.Clone() as Ticket;
ticket.Id += "_changed_id";
ticket.Customer = await context.Customers.SingleAsync(x => x.Id.Equals(_validTicket.Customer.Id));
ticket.Discount = await context.Discounts.SingleAsync(x => x.Id.Equals(_validTicket.Discount.Id));
ticket.Tariff = await context.TicketTariffs.SingleAsync(x => x.Id.Equals(_validTicket.Tariff.Id));
ticket.Group = await context.Groups.SingleAsync(x => x.Id.Equals(_validTicket.Group.Id));
var result = await service.AddAsync(ticket);
result.Should().BeEquivalentTo(ticket);
}
}
}
public async Task GetWithPaginationAsync__Number_of_elements_on_single_page_is_less_than_page_size__Should_return_all_these_elements()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets.RemoveRange(await context.Tickets.ToArrayAsync());
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
for (int i = 0; i < 10; i++)
{
await context.Tickets.AddAsync(new Ticket { Id = i.ToString() });
}
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
// Page will be first with 6 elements and second with 4 elements. Second page will be return.
var result = await service.GetWithPaginationAsync(2, 6);
// More generic solution is: Count() should be count of elements in resource % pageSize.
result.Count().Should().Be(4);
}
}
}
public async Task GetWithPaginationAsync__Page_size_is_negative__Should_throw_ArgumentOutOfRangeException()
{
var service = new TicketDbService(_dbContextMock.Object, _logger);
Func <Task> action = async() => await service.GetWithPaginationAsync(3, -10);
await action.Should().ThrowExactlyAsync <ArgumentOutOfRangeException>("Because page size cannot be negative number.");
}
public async Task AddAsync__Argument_is_null__Should_throw_ArgumentNullException()
{
var service = new TicketDbService(_dbContextMock.Object, _logger);
Func <Task> result = async() => await service.AddAsync(null as Ticket);
await result.Should().ThrowExactlyAsync <ArgumentNullException>("Because argument 'Ticket' is null.");
}
public async Task GetAsync__Id_is_null_or_empty__Should_throw_ArgumentException([Values(null, "")] string id)
{
var service = new TicketDbService(_dbContextMock.Object, _logger);
Func <Task> action = async() => await service.GetAsync(id);
await action.Should().ThrowExactlyAsync <ArgumentException>("Because id cannot be null or empty string.");
}
public async Task GetWithPaginationAsync__Page_number_is_less_than_1__Should_throw_ArgumentOutOfRangeException()
{
var service = new TicketDbService(_dbContextMock.Object, _logger);
Func <Task> action = async() => await service.GetWithPaginationAsync(0, 10);
await action.Should().ThrowExactlyAsync <ArgumentOutOfRangeException>("Because page number cannot be less than 1.");
}
public async Task AddAsync__Add_successful__Resource_contains_added_ticket_tariff()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
await service.AddAsync(_validTicket);
context.Tickets.Contains(_validTicket).Should().BeTrue();
}
}
}
public async Task GetByAsync__Argument_predicate_is_null__Should_throw_ArgumentNullException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
Func <Task> action = async() => await service.GetByAsync(null);
await action.Should().ThrowExactlyAsync <ArgumentNullException>();
}
}
}
public async Task GetAsync__Found_zero_matching_ticket__Should_throw_InvalidOperationException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
Func <Task> action = async() => await service.GetAsync("a");
await action.Should().ThrowExactlyAsync <InvalidOperationException>("Because Ticket not found.");
}
}
}
public async Task AddAsync__Add_successful__Should_return_added_ticket_tariff()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
var result = await service.AddAsync(_validTicket);
result.Should().BeEquivalentTo(_validTicket);
}
}
}
public async Task GetWithPaginationAsync__Resource_is_null__Should_throw_InternalDbServiceException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets = null as DbSet <Ticket>;
var service = new TicketDbService(context, _logger);
Func <Task> action = async() => await service.GetWithPaginationAsync(1, 1);
await action.Should().ThrowExactlyAsync <InternalDbServiceException>("Because resource reference is set to null");
}
}
}
public async Task AddAsync__Add_successful__Resource_length_should_be_greater_by_1()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
int expectedLength = context.Tickets.Count() + 1;
var service = new TicketDbService(context, _logger);
await service.AddAsync(_validTicket);
context.Tickets.Count().Should().Be(expectedLength);
}
}
}
public async Task GetByAsync__None_ticket_tariffs_satisfy_predicate__Should_return_empty_IEnumerable()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
// This predicate filters tariffs with CreatedAt equals DateTime.MaxValue. It will none tariffs.
var result = await service.GetByAsync(x => x.CreatedAt == DateTime.MaxValue);
result.Count().Should().Be(0);
}
}
}
public async Task GetAllAsync__All_tickets_found__Should_return_IEnumerable_for_all_tickets()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
int expectedLength = context.Tickets.ToArray().Length;
var service = new TicketDbService(context, _logger);
var result = await service.GetAllAsync();
result.Count().Should().Be(expectedLength);
}
}
}
public async Task GetByAsync__At_least_one_ticket_tariffs_found__Should_return_IEnumerable_for_this_tarifs()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
int expectedLength = context.Tickets.ToArray().Length;
var service = new TicketDbService(context, _logger);
// This predicate filters tariffs with CreatedAt after DateTime.MinValue. It will be all of tariffs.
var result = await service.GetByAsync(_predicate);
result.Count().Should().Be(expectedLength);
}
}
}
public async Task GetAsync__Resource_is_empty__Should_throw_InvalidOperationException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets.RemoveRange(await context.Tickets.ToListAsync());
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
Func <Task> action = async() => await service.GetAsync("a");
await action.Should().ThrowExactlyAsync <InvalidOperationException>("Because resource is empty and cannot get single instance of Ticket.");
}
}
}
public async Task GetWithPaginationAsync__Resource_is_empty__Should_return_empty_IEnumerable()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets.RemoveRange(await context.Tickets.ToArrayAsync());
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
var result = await service.GetWithPaginationAsync(4, 5);
result.Count().Should().Be(0);
}
}
}
public async Task GetByAsync__Resource_does_not_exist__Should_throw_InternalDbServiceException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
// Drop Tickets table.
context.Database.ExecuteSqlCommand("DROP TABLE [Tickets]");
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
Func <Task> action = async() => await service.GetByAsync(_predicate);
await action.Should().ThrowExactlyAsync <InternalDbServiceException>("Because resource doesnt exist and cannot get single instance of Ticket. " +
"NOTE Excaption actually is type of 'SqLiteError' only if database provider is SQLite.");
}
}
}
public async Task GetAsync__Ticket_found__Should_return_this_ticket()
{
Ticket expectedTicket;
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
expectedTicket = await context.Tickets.FirstOrDefaultAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
var result = await service.GetAsync(expectedTicket.Id);
result.Should().BeEquivalentTo(expectedTicket);
}
}
}
public async Task AddAsync__In_resource_exists_the_same_ticket_as_this_one_to_be_added__Should_throw_InvalidOperationException()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
context.Tickets.Add(_validTicket);
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
// Testing method
var service = new TicketDbService(context, _logger);
Func <Task> result = async() => await service.AddAsync(_validTicket);
await result.Should().ThrowExactlyAsync <InvalidOperationException>("Because in resource exists the same Ticket as this one to be added.");
}
}
}
public async Task GetWithPaginationAsync__There_are_not_elements_on_single_page__Should_return_empty_IEnumerable()
{
using (var factory = new DbContextFactory())
{
using (var context = await factory.CreateContextAsync())
{
for (int i = 0; i < 10; i++)
{
await context.Tickets.AddAsync(new Ticket { Id = i.ToString() });
}
await context.SaveChangesAsync();
}
using (var context = await factory.CreateContextAsync())
{
var service = new TicketDbService(context, _logger);
// In this case is only 2 pages with any data.
var result = await service.GetWithPaginationAsync(4, 5);
result.Count().Should().Be(0);
}
}
}
