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 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 GetAsync__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.GetAsync("a");
await action.Should().ThrowExactlyAsync <InternalDbServiceException>("Because resource reference is set to null");
}
}
}
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 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 GetAsync__Resource_does_not_exit__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.GetAsync("a");
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.");
}
}
}