public static async Task FirstOrNotFoundAsync_EntityDoesNotExist_ThrowNotFoundException(TestDbContext dbContext)
{
try
{
var order = await dbContext.SettlementOrders
.Include(o => o.IndividualConsumers)
.Include(o => o.OrganisationalConsumers)
.FirstOrNotFoundAsync(o => o.Id == 999999, nameof(SettlementOrder), 999999, CancellationToken.None);
}
catch (NotFoundException)
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrNotFoundAsync_EntityDoesNotExist_ThrowNotFoundException), true);
}
catch (Exception)
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrNotFoundAsync_EntityDoesNotExist_ThrowNotFoundException), false);
}
}
public static async Task FirstOrDefaultAsync_EntityDoesNotExist_ReturnDefault(TestDbContext dbContext)
{
try
{
var order = await dbContext.SettlementOrders
.Include(o => o.IndividualConsumers)
.Include(o => o.OrganisationalConsumers)
.FirstOrDefaultAsync(o => o.Id == 999999);
if (order == default)
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrDefaultAsync_EntityDoesNotExist_ReturnDefault), true);
}
}
catch (Exception)
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrNotFoundAsync_EntityDoesNotExist_ThrowNotFoundException), false);
}
}
public static async Task NavigationProperty_EntityNotIncluded_ThrowException(TestDbContext dbContext)
{
try
{
var order = await dbContext.SettlementOrders
.FirstOrNotFoundAsync(o => o.Id == 1, nameof(SettlementOrder), 1, CancellationToken.None);
var consumersCount = order.IndividualConsumers.Count;
if (consumersCount >= 0)
{
ConsoleLoggingHelper.WriteTestResult(nameof(NavigationProperty_EntityNotIncluded_ThrowException), false);
}
}
catch (Exception)
{
ConsoleLoggingHelper.WriteTestResult(nameof(NavigationProperty_EntityNotIncluded_ThrowException), true);
}
}
public static async Task FirstOrNotFoundAsync_EntityExists_ReturnEntity(TestDbContext dbContext)
{
try
{
var order = await dbContext.SettlementOrders
.Include(o => o.IndividualConsumers)
.Include(o => o.OrganisationalConsumers)
.FirstOrNotFoundAsync(o => o.Id == 1, nameof(SettlementOrder), 1, CancellationToken.None);
if (order != null)
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrNotFoundAsync_EntityExists_ReturnEntity), true);
}
else
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrNotFoundAsync_EntityExists_ReturnEntity), false);
}
}
catch (Exception)
{
ConsoleLoggingHelper.WriteTestResult(nameof(FirstOrNotFoundAsync_EntityExists_ReturnEntity), false);
}
}
public static async Task OwnedEntity_OwningEntityExists_NoExceptionThrown(TestDbContext dbContext)
{
try
{
var order = await dbContext.SettlementOrders
.FirstOrNotFoundAsync(o => o.Id == 1, nameof(SettlementOrder), 1, CancellationToken.None);
var address = order.ForwardingAddress;
if (address.State == null)
{
ConsoleLoggingHelper.WriteTestResult(nameof(OwnedEntity_OwningEntityExists_NoExceptionThrown), false);
}
else
{
ConsoleLoggingHelper.WriteTestResult(nameof(OwnedEntity_OwningEntityExists_NoExceptionThrown), true);
}
}
catch (Exception)
{
ConsoleLoggingHelper.WriteTestResult(nameof(OwnedEntity_OwningEntityExists_NoExceptionThrown), false);
}
}
private static async Task EfCoreDemo_RestrictedClientEvaluation(ITestDbContext dbContext)
{
var expectedExceptionThrown = false;
var unexpectedExceptionThrown = false;
try
{
// This will fail because EF can't translate 'HasCorrectIdentifierForDemo(o.Identifier)' into SQL.
var result = await dbContext.SettlementOrders.AsNoTracking()
.Where(o => o.Identifier.Contains("EF") && HasCorrectIdentifierForDemo(o.Identifier))
.Select(o => o.Id)
.ToListAsync();
}
catch (InvalidOperationException translationFailedException)
{
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("----------------------------------------");
Console.WriteLine("-- EfCoreDemo_RestrictedClientEvaluation");
Console.WriteLine();
Console.WriteLine(translationFailedException.Message);
Console.WriteLine();
expectedExceptionThrown = true;
}
// If we really need to get this to evaluate on the Client side, then we need to instruct EF to bring
// the records into memory for further processing, like so:
// ----------------------------------------
// -- Synchronously
try
{
var results = dbContext.SettlementOrders.AsNoTracking()
.Where(o => o.Identifier.Contains("Ef")) // <-- Processed on the Server (SQL) - i.e. Translates to SQL
.AsEnumerable() // <-- This will force the records to load into memory after the SQL component is finished.
.Where(o => HasCorrectIdentifierForDemo(o.Identifier)) // <-- Processed Client Side (C#)
.Select(o => o.Id)
.ToList(); // Yes, this is NOT Async. And that's by design.
if (results.Count != 1)
{
throw new Exception("Invalid Data - EfCoreDemo_RestrictedClientEvaluation");
}
}
catch (Exception)
{
unexpectedExceptionThrown = true;
}
// ----------------------------------------
// -- Asynchronously
try
{
var results = new List <int>();
var ordersQuery = dbContext.SettlementOrders.AsNoTracking()
.Where(o => o.Identifier.Contains("Ef")); // <-- Processed on the Server (SQL) - i.e. Translates to SQL
await foreach (var order in ordersQuery.AsAsyncEnumerable())
{
if (HasCorrectIdentifierForDemo(order.Identifier))
{
results.Add(order.Id);
}
}
if (results.Count != 1)
{
throw new Exception("Invalid Data - EfCoreDemo_RestrictedClientEvaluation");
}
}
catch (Exception)
{
unexpectedExceptionThrown = true;
}
if (unexpectedExceptionThrown || !expectedExceptionThrown)
{
ConsoleLoggingHelper.WriteTestResult(nameof(EfCoreDemo_RestrictedClientEvaluation), passed: false);
}
else
{
ConsoleLoggingHelper.WriteTestResult(nameof(EfCoreDemo_RestrictedClientEvaluation), passed: true);
}
}
private static async Task EfCoreDemo_ReferenceStitchingChanges(IServiceProvider serviceProvider)
{
var expectedExceptionThrown = false;
var unexpectedExceptionThrown = false;
// ----------------------------------------
// -- Incorrect Method
try
{
using var scope = serviceProvider.CreateScope();
using var dbContext = scope.ServiceProvider.GetRequiredService <ITestDbContext>();
var order = new SettlementOrder();
var document = new Document
{
OrderId = order.Id,
FilePath = "EfCoreDemo_ReferenceStitchingChanges_Incorrect"
};
dbContext.Documents.Add(document);
dbContext.SettlementOrders.Add(order);
await dbContext.SaveChangesAsync(CancellationToken.None);
}
catch (Exception)
{
expectedExceptionThrown = true;
}
// ----------------------------------------
// -- Correct Method
try
{
using var scope = serviceProvider.CreateScope();
using var dbContext = scope.ServiceProvider.GetRequiredService <ITestDbContext>();
var order = new SettlementOrder();
var document = new Document
{
Order = order,
FilePath = "EfCoreDemo_ReferenceStitchingChanges_Success"
};
dbContext.Documents.Add(document);
dbContext.SettlementOrders.Add(order);
await dbContext.SaveChangesAsync(CancellationToken.None);
}
catch (Exception)
{
unexpectedExceptionThrown = true;
}
if (unexpectedExceptionThrown || !expectedExceptionThrown)
{
ConsoleLoggingHelper.WriteTestResult(nameof(EfCoreDemo_ReferenceStitchingChanges), passed: false);
}
else
{
ConsoleLoggingHelper.WriteTestResult(nameof(EfCoreDemo_ReferenceStitchingChanges), passed: true);
}
}
