public void ExplicitLoadOfNavigationPropertyReferenceIsTracked()
{
using (var db = new CustomerDbContext())
{
var invoices = db.Invoices.ToList();
Assert.NotNull(invoices);
Assert.AreEqual(3, invoices.Count);
for (int i = 0; i < invoices.Count; i++)
{
var queriedInvoice = invoices.ElementAt(i);
Assert.AreEqual(1, queriedInvoice.CustomerId);
Assert.AreEqual(i + 1, queriedInvoice.InvoiceId);
Assert.AreEqual($"SomeInvoiceNumber{i + 1}", queriedInvoice.Number);
}
// explicit load before referencing navigation entity reference
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
foreach (var queriedInvoice in invoices)
{
db.Entry(queriedInvoice).Reference(x => x.Customer).Load();
var explicitLoadedCustomer = queriedInvoice.Customer;
Assert.NotNull(explicitLoadedCustomer);
Assert.AreEqual(1, explicitLoadedCustomer.CustomerId);
Assert.AreEqual("SomeCustomerName", explicitLoadedCustomer.Name);
}
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
}
}
public void ExplicitLoadOfNavigationPropertyCollectionIsNotTracked()
{
using (var db = new CustomerDbContext())
{
var customers = db.Customers.ToList();
Assert.NotNull(customers);
Assert.AreEqual(1, customers.Count);
var queriedCustomer = customers[0];
Assert.AreEqual("SomeCustomerName", queriedCustomer.Name);
// explicit load before referencing navigation entity collection
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
db.Entry(queriedCustomer).Collection(x => x.Invoices).Load();
Assert.NotNull(queriedCustomer.Invoices);
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
Assert.AreEqual(3, queriedCustomer.Invoices.Count);
for (int i = 0; i < queriedCustomer.Invoices.Count; i++)
{
var explicitLoadedInvoice = queriedCustomer.Invoices.ElementAt(i);
Assert.AreEqual(1, explicitLoadedInvoice.CustomerId);
Assert.AreEqual(i + 1, explicitLoadedInvoice.InvoiceId);
Assert.AreEqual($"SomeInvoiceNumber{i + 1}", explicitLoadedInvoice.Number);
}
}
}
public void EagerLoadOfNavigationPropertyCollectionIsNotTracked()
{
using (var db = new CustomerDbContext())
{
var customers = db.Customers
.Include(x => x.Invoices)
.ToList();
Assert.NotNull(customers);
Assert.AreEqual(1, customers.Count);
var queriedCustomer = customers[0];
Assert.AreEqual("SomeCustomerName", queriedCustomer.Name);
// navigation entity collection was eager loaded at query time
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
Assert.NotNull(queriedCustomer.Invoices);
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
Assert.AreEqual(3, queriedCustomer.Invoices.Count);
for (int i = 0; i < queriedCustomer.Invoices.Count; i++)
{
var eagerLoadedInvoice = queriedCustomer.Invoices.ElementAt(i);
Assert.AreEqual(1, eagerLoadedInvoice.CustomerId);
Assert.AreEqual(i + 1, eagerLoadedInvoice.InvoiceId);
Assert.AreEqual($"SomeInvoiceNumber{i+1}", eagerLoadedInvoice.Number);
}
}
}
public void LazyLoadOfNavigationPropertyCollectionIsTracked()
{
using (var db = new CustomerDbContext())
{
var customers = db.Customers.ToList();
Assert.NotNull(customers);
Assert.AreEqual(1, customers.Count);
var queriedCustomer = customers[0];
Assert.AreEqual("SomeCustomerName", queriedCustomer.Name);
// lazy load via navigation entity collection
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
Assert.NotNull(queriedCustomer.Invoices);
Assert.AreEqual(1, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
var lazyLoadEntryForInvoicesProperty = this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Single();
StringAssert.Contains("lazy load detected accessing navigation property Invoices from entity Customer", lazyLoadEntryForInvoicesProperty.Key);
Assert.AreEqual(1, lazyLoadEntryForInvoicesProperty.Value.Count);
var lazyLoadRuntimeInMilliseconds = lazyLoadEntryForInvoicesProperty.Value.Single();
Assert.True(lazyLoadRuntimeInMilliseconds >= 0);
Assert.AreEqual(3, queriedCustomer.Invoices.Count);
for (int i = 0; i < queriedCustomer.Invoices.Count; i++)
{
var lazyLoadedInvoice = queriedCustomer.Invoices.ElementAt(i);
Assert.AreEqual(1, lazyLoadedInvoice.CustomerId);
Assert.AreEqual(i + 1, lazyLoadedInvoice.InvoiceId);
Assert.AreEqual($"SomeInvoiceNumber{i + 1}", lazyLoadedInvoice.Number);
}
}
}
public void LazyLoadOfNavigationPropertyReferenceIsTracked()
{
using (var db = new CustomerDbContext())
{
var invoices = db.Invoices.ToList();
Assert.NotNull(invoices);
Assert.AreEqual(3, invoices.Count);
for (int i = 0; i < invoices.Count; i++)
{
var queriedInvoice = invoices.ElementAt(i);
Assert.AreEqual(1, queriedInvoice.CustomerId);
Assert.AreEqual(i + 1, queriedInvoice.InvoiceId);
Assert.AreEqual($"SomeInvoiceNumber{i + 1}", queriedInvoice.Number);
}
// lazy load via navigation entity reference
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
for (int i = 0; i < invoices.Count; i++)
{
var queriedInvoice = invoices.ElementAt(i);
var lazyLoadedCustomer = queriedInvoice.Customer;
Assert.AreEqual(1, lazyLoadedCustomer.CustomerId);
Assert.AreEqual("SomeCustomerName", lazyLoadedCustomer.Name);
}
Assert.AreEqual(1, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
var lazyLoadEntryForCustomerProperty = this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Single();
StringAssert.Contains("lazy load detected accessing navigation property Customer from entity Invoice", lazyLoadEntryForCustomerProperty.Key);
Assert.AreEqual(1, lazyLoadEntryForCustomerProperty.Value.Count);
Assert.True(lazyLoadEntryForCustomerProperty.Value.Single() >= 0); // should be a valid runtime in milliseconds
}
}
public void LazyLoadsOfNPlus1SelectsAreTracked()
{
using (var db = new CustomerDbContext())
{
var customers = db.Customers.ToList();
Assert.NotNull(customers);
Assert.AreEqual(1, customers.Count);
var queriedCustomer = customers[0];
Assert.AreEqual("SomeCustomerName", queriedCustomer.Name);
// lazy load via navigation entity collection
Assert.AreEqual(0, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
Assert.NotNull(queriedCustomer.Invoices);
Assert.AreEqual(1, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
var lazyLoadEntryForInvoicesProperty = this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Single();
StringAssert.Contains("lazy load detected accessing navigation property Invoices from entity Customer", lazyLoadEntryForInvoicesProperty.Key);
Assert.AreEqual(1, lazyLoadEntryForInvoicesProperty.Value.Count);
var lazyLoadRuntimeInMilliseconds = lazyLoadEntryForInvoicesProperty.Value.Single();
Assert.True(lazyLoadRuntimeInMilliseconds >= 0);
// get rid of this lazy-load entry to make the N+1 asserts below simpler
this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Clear();
for (int invoiceIndex = 0; invoiceIndex < queriedCustomer.Invoices.Count; invoiceIndex++)
{
var invoice = queriedCustomer.Invoices.ElementAt(invoiceIndex);
// no lazy load before accessing the InvoiceLineItems under this invoice
for (int lineItemIndex = 0; lineItemIndex < invoice.InvoiceLineItems.Count; lineItemIndex++)
{
var invoiceLineItem = invoice.InvoiceLineItems.ElementAt(lineItemIndex);
Assert.AreEqual($"SomeInvoiceLineItem{lineItemIndex + 1}-{invoice.Number}", invoiceLineItem.Description);
}
// The one lazy load entry should have incremented with the lazy-load of the line items
Assert.AreEqual(1, this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Count);
var lazyLoadEntryForLineItemsProperty = this.LazyLoadLoggingInterceptor.LazyLoadRuntimes.Single();
Assert.AreEqual(invoiceIndex + 1, lazyLoadEntryForLineItemsProperty.Value.Count);
}
}
}
public void BeforeEachTest()
{
using (var dataContext = new CustomerDbContext())
{
if (dataContext.Database.Exists())
{
dataContext.Database.Delete();
}
dataContext.Database.Create();
}
var customer = new Customer()
{
Name = "SomeCustomerName",
Invoices = new List <Invoice>()
{
new Invoice()
{
Number = "SomeInvoiceNumber1",
InvoiceLineItems = new List <InvoiceLineItem>()
{
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem1-SomeInvoiceNumber1"
},
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem2-SomeInvoiceNumber1"
},
}
},
new Invoice()
{
Number = "SomeInvoiceNumber2",
InvoiceLineItems = new List <InvoiceLineItem>()
{
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem1-SomeInvoiceNumber2"
},
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem2-SomeInvoiceNumber2"
},
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem3-SomeInvoiceNumber2"
},
}
},
new Invoice()
{
Number = "SomeInvoiceNumber3",
InvoiceLineItems = new List <InvoiceLineItem>()
{
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem1-SomeInvoiceNumber3"
},
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem2-SomeInvoiceNumber3"
},
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem3-SomeInvoiceNumber3"
},
new InvoiceLineItem()
{
Description = "SomeInvoiceLineItem4-SomeInvoiceNumber3"
},
}
},
},
};
// have the database start out with some test data
using (var db = new CustomerDbContext())
{
db.Customers.Add(customer);
db.SaveChanges();
}
// start each test with a fresh interceptor and register it
this.LazyLoadLoggingInterceptor = new LazyLoadLoggingInterceptor(0, false);
DbInterception.Add(this.LazyLoadLoggingInterceptor);
}
