private async Task <IEnumerable <T> > CanDeleteBillingBase <T>(EntityManager em, String typeName, String expandPropName = null) where T : IEntity
{
// // Registering resource names for each derived type
// // because these resource names are not in metadata
// // because there are no corresponding DbSets in the DbContext
// // and that's how Breeze generates resource names
MetadataStore.Instance.SetResourceName(typeName + "s", typeof(T));
var q0 = new EntityQuery <T>(typeName + "s").With(em).Take(1);
if (expandPropName != null)
{
q0 = q0.Expand(expandPropName);
}
var r0 = await q0.Execute();
if (r0.Count() == 0)
{
Assert.Inconclusive("Please restart the server - inheritance data was deleted by prior tests");
}
var targetEntity = r0.First();
var targetKey = targetEntity.EntityAspect.EntityKey;
List <IEntity> dependentEntities = null;
if (expandPropName != null)
{
var expandVal = (IEnumerable)targetEntity.EntityAspect.GetValue(expandPropName);
dependentEntities = expandVal.Cast <IEntity>().ToList();
dependentEntities.ForEach(de => de.EntityAspect.Delete());
}
targetEntity.EntityAspect.Delete();
var sr0 = await em.SaveChanges();
var deletedEntities = sr0.Entities;
Assert.IsTrue(deletedEntities.Contains(targetEntity), "should contain target");
if (expandPropName != null)
{
Assert.IsTrue(deletedEntities.Count == dependentEntities.Count + 1);
}
Assert.IsTrue(deletedEntities.All(de => de.EntityAspect.EntityState.IsDetached()), "should all be detached");
// try to refetch deleted
var r1 = await em.ExecuteQuery(targetKey.ToQuery <T>());
Assert.IsTrue(r1.Count() == 0, "should not be able to find entity after delete");
return(r1);
}
