public void CustomerServiceViaVirtualMethod_should_get_current_UTC_date()
{
// Given
var service = new CustomerServiceViaVirtualMethod();
// When
var now = service.GetUtcNow();
// Then
Assert.That(now, Is.EqualTo(DateTime.UtcNow).Within(50).Milliseconds);
}
public void CustomerServiceViaVirtualMethod_should_generate_unique_IDs()
{
// Given
var service = new CustomerServiceViaVirtualMethod();
// When
var ids = Enumerable.Range(0, 100).Select(_ => service.NewId()).ToList();
// Then
Assert.That(ids, Is.Unique);
}