public async ValueTask WorkWithCachedSpecification()
{
const string dbName = "FakeDatabase";
using (TrainingDb dbContext = this.testFixture.CreateInMemoryDbContext(dbName))
{
dbContext.Database.EnsureCreated();
IOptions <MemoryCacheOptions> memCacheOptions =
Options.Create <MemoryCacheOptions>(new MemoryCacheOptions());
var memoryCache = new MemoryCache(memCacheOptions);
IReadonlyRepository <Login> repo =
new CachedRepository <Login, TrainingDb>(dbContext, memoryCache);
ISpecification <Login> spec =
this.specificationFactories.For <Login>()
.Where(l => l.Id == 1)
.Include(l => l.Student)
.Not()
.AsCached(TimeSpan.FromHours(12), 1);
System.Collections.Generic.IEnumerable <Login> logins = await repo.ListAsync(spec);
logins.Should().HaveCount(2);
logins.Select(l => l.Student).Should().NotBeNull();
// Let's create a new repository instance with the same cache
// I would expect in this case that the repository returns the same instances
// if they have been retrieved from the cache.
repo =
new CachedRepository <Login, TrainingDb>(dbContext, memoryCache);
System.Collections.Generic.IEnumerable <Login> cachedLogins = await repo.ListAsync(spec);
cachedLogins.Should().HaveCount(2);
cachedLogins.Should().BeSameAs(logins);
}
}