public void PerformanceTest_EntityDiffer_GetChanges_ForwardChangesOnly_SingleChange(int entityCount)
{
CreateEntitiesWithMockComponentData(SrcEntityManager, entityCount, typeof(EcsTestData), typeof(EcsTestData2), typeof(EcsTestSharedComp));
var entity = default(Entity);
using (var entities = SrcEntityManager.GetAllEntities(Allocator.Temp))
{
entity = entities[0];
}
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
// Fast forward the shadow world
using (differ.GetChanges(EntityManagerDifferOptions.FastForwardShadowWorld, Allocator.TempJob))
{
}
var startValue = 99;
Measure.Method(() =>
{
SrcEntityManager.SetComponentData(entity, new EcsTestData(startValue++));
// Get changes with all options selected
using (differ.GetChanges(EntityManagerDifferOptions.IncludeForwardChangeSet, Allocator.TempJob))
{
}
})
.Definition("EntityDiffer")
.WarmupCount(1)
.MeasurementCount(100)
.Run();
}
}
public void EntityDiffer_GetChanges_IgnoresSystemState()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entityGuid = CreateEntityGuid();
var entity = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity, entityGuid);
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp)) {}
SrcEntityManager.AddComponentData(entity, new EcsState1 {
Value = 9
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsFalse(changes.AnyChanges);
}
SrcEntityManager.SetComponentData(entity, new EcsState1 {
Value = 10
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsFalse(changes.AnyChanges);
}
// NOTE: the system state component being copied to shadow world is not required by the public API.
// This is simply defining the expected internal behaviour.
Assert.AreEqual(10, differ.ShadowEntityManager.GetComponentData <EcsState1>(entity).Value);
}
}
public void EntityDiffer_GetChanges_CreateEntityAndSetComponentData_IncrementalChanges()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entityGuid = CreateEntityGuid();
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestData));
SrcEntityManager.SetComponentData(entity, entityGuid);
SrcEntityManager.SetComponentData(entity, new EcsTestData {
value = 9
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.AnyChanges);
}
// Mutate some component data.
SrcEntityManager.SetComponentData(entity, entityGuid);
SrcEntityManager.SetComponentData(entity, new EcsTestData {
value = 10
});
// The entityGuid value is the same so it should not be picked up during change tracking.
// We should only see the one data change.
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
// The ForwardChangeSet will contain a set value 10
Assert.IsTrue(changes.HasForwardChangeSet);
Assert.AreEqual(0, changes.ForwardChangeSet.DestroyedEntityCount);
Assert.AreEqual(0, changes.ForwardChangeSet.CreatedEntityCount);
Assert.AreEqual(1, changes.ForwardChangeSet.SetComponents.Length);
Assert.AreEqual(0, changes.ForwardChangeSet.AddComponents.Length);
// The ReverseChangeSet will contain a set value 9
Assert.IsTrue(changes.HasReverseChangeSet);
Assert.AreEqual(0, changes.ReverseChangeSet.DestroyedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.CreatedEntityCount);
Assert.AreEqual(1, changes.ReverseChangeSet.SetComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.AddComponents.Length);
}
SrcEntityManager.DestroyEntity(entity);
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
Assert.AreEqual(1, changes.ForwardChangeSet.DestroyedEntityCount);
Assert.AreEqual(0, changes.ForwardChangeSet.CreatedEntityCount);
Assert.AreEqual(0, changes.ForwardChangeSet.SetComponents.Length);
Assert.AreEqual(0, changes.ForwardChangeSet.RemoveComponents.Length);
// In this case the ReverseChangeSet should describe how to get this entity back in it's entirety
Assert.IsTrue(changes.HasReverseChangeSet);
Assert.AreEqual(0, changes.ReverseChangeSet.DestroyedEntityCount);
Assert.AreEqual(1, changes.ReverseChangeSet.CreatedEntityCount);
Assert.AreEqual(2, changes.ReverseChangeSet.AddComponents.Length);
Assert.AreEqual(2, changes.ReverseChangeSet.SetComponents.Length);
}
}
}
public unsafe void EntityDiffer_GetChanges_BlobAssets_SetComponent_SameContentHash()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var blobAssetReference0 = BlobAssetReference <int> .Create(10);
var blobAssetReference1 = BlobAssetReference <int> .Create(10);
var entity0 = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestDataBlobAssetRef));
SrcEntityManager.SetComponentData(entity0, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity0, new EcsTestDataBlobAssetRef
{
value = blobAssetReference0
});
var entity1 = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestDataBlobAssetRef));
SrcEntityManager.SetComponentData(entity1, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity1, new EcsTestDataBlobAssetRef
{
value = blobAssetReference1
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
// Only one blob asset is created
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(1));
Assert.That(forward.DestroyedBlobAssets.Length, Is.EqualTo(0));
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(2));
Assert.That(forward.BlobAssetReferenceChanges[0].Value, Is.EqualTo(forward.CreatedBlobAssets[0].Hash));
Assert.That(forward.BlobAssetReferenceChanges[1].Value, Is.EqualTo(forward.CreatedBlobAssets[0].Hash));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(sizeof(int)));
Assert.That(*(int *)forward.BlobAssetData.GetUnsafePtr(), Is.EqualTo(10));
}
SrcEntityManager.DestroyEntity(entity1);
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.That(changes.ForwardChangeSet.DestroyedBlobAssets.Length, Is.EqualTo(0));
}
SrcEntityManager.DestroyEntity(entity0);
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.That(changes.ForwardChangeSet.DestroyedBlobAssets.Length, Is.EqualTo(1));
}
blobAssetReference0.Dispose();
blobAssetReference1.Dispose();
}
}
public void EntityDiffer_GetChanges_CreateEntityAndSetComponentData_WithoutFastForward_ManagedComponents()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestData), typeof(EcsTestManagedComponent));
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity, new EcsTestData {
value = 9
});
SrcEntityManager.SetComponentData(entity, new EcsTestManagedComponent {
value = "SomeString"
});
const EntityManagerDifferOptions options = EntityManagerDifferOptions.IncludeForwardChangeSet |
EntityManagerDifferOptions.IncludeReverseChangeSet;
using (var changes = differ.GetChanges(options, Allocator.Temp))
{
// ForwardChanges defines all operations needed to go from the shadow state to the current state.
Assert.IsTrue(changes.HasForwardChangeSet);
Assert.AreEqual(0, changes.ForwardChangeSet.DestroyedEntityCount);
Assert.AreEqual(1, changes.ForwardChangeSet.CreatedEntityCount);
Assert.AreEqual(3, changes.ForwardChangeSet.AddComponents.Length);
Assert.AreEqual(2, changes.ForwardChangeSet.SetComponents.Length);
Assert.AreEqual(1, changes.ForwardChangeSet.SetManagedComponents.Length);
// ReverseChanges defines all operations needed to go from the current state back to the last shadow state. (i.e. Undo)
Assert.IsTrue(changes.HasReverseChangeSet);
Assert.AreEqual(1, changes.ReverseChangeSet.DestroyedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.CreatedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.AddComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.SetComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.SetManagedComponents.Length);
}
// Since we did not fast forward the inner shadow world. We should be able to generate the exact same changes again.
using (var changes = differ.GetChanges(options, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
Assert.AreEqual(0, changes.ForwardChangeSet.DestroyedEntityCount);
Assert.AreEqual(1, changes.ForwardChangeSet.CreatedEntityCount);
Assert.AreEqual(3, changes.ForwardChangeSet.AddComponents.Length);
Assert.AreEqual(2, changes.ForwardChangeSet.SetComponents.Length);
Assert.AreEqual(1, changes.ForwardChangeSet.SetManagedComponents.Length);
Assert.IsTrue(changes.HasReverseChangeSet);
Assert.AreEqual(1, changes.ReverseChangeSet.DestroyedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.CreatedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.AddComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.SetComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.SetManagedComponents.Length);
}
}
}
public void DeserializeWithDifferentDataLayoutThrows()
{
using (var differ = new EntityManagerDiffer(SrcWorld.EntityManager, Allocator.TempJob))
{
var entity = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity, CreateEntityGuid());
SrcEntityManager.AddComponentData(entity, new EcsTestData(5));
var options = EntityManagerDifferOptions.IncludeForwardChangeSet | EntityManagerDifferOptions.FastForwardShadowWorld;
using (var changes = differ.GetChanges(options, Allocator.TempJob))
{
var typeHashes = changes.ForwardChangeSet.TypeHashes;
var modifiedTypeHash = typeHashes[0];
modifiedTypeHash.StableTypeHash += 1;
typeHashes[0] = modifiedTypeHash;
var srcChange = new LiveLinkChangeSet
{
Changes = changes.ForwardChangeSet
};
Assert.Throws <ArgumentException>(() => SerializeAndDeserialize(srcChange));
}
}
}
public unsafe void EntityDiffer_GetChanges_BlobAssets_SetComponent_SharedAsset()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var blobAssetReference = BlobAssetReference <int> .Create(10);
try
{
for (var i = 0; i < 100; i++)
{
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestDataBlobAssetRef));
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity, new EcsTestDataBlobAssetRef {
value = blobAssetReference
});
}
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(1));
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(100));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(sizeof(int)));
Assert.That(*(int *)forward.BlobAssetData.GetUnsafePtr(), Is.EqualTo(10));
}
}
finally
{
blobAssetReference.Dispose();
}
}
}
public void EntityDiffer_GetChanges_CreateEntityAndSetSharedComponentData_IncrementalChanges_ManagedComponents()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestSharedComp), typeof(EcsTestManagedComponent));
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity, new EcsTestManagedComponent {
value = "SomeString"
});
SrcEntityManager.SetSharedComponentData(entity, new EcsTestSharedComp {
value = 2
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
Assert.AreEqual(1, changes.ForwardChangeSet.CreatedEntityCount);
Assert.AreEqual(3, changes.ForwardChangeSet.AddComponents.Length);
Assert.AreEqual(1, changes.ForwardChangeSet.SetComponents.Length);
Assert.AreEqual(1, changes.ForwardChangeSet.SetSharedComponents.Length);
Assert.AreEqual(1, changes.ForwardChangeSet.SetManagedComponents.Length);
}
}
}
public void EntityPatcher_ApplyChanges_EntityPatchWithAmbiguousTargetDoesNotThrow()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entityGuid0 = CreateEntityGuid();
var entity0 = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity0, entityGuid0);
var entityGuid1 = CreateEntityGuid();
var entity1 = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity1, entityGuid1);
PushChanges(differ, DstEntityManager);
// Create a patch
SrcEntityManager.AddComponentData(entity1, new EcsTestDataEntity {
value1 = entity0
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.IncludeForwardChangeSet, Allocator.TempJob))
{
var forward = changes.ForwardChangeSet;
Assert.That(forward.EntityReferenceChanges.Length, Is.EqualTo(1));
// Create a new entity in the dst world with the same ID the patch target.
var dstEntity0 = DstEntityManager.CreateEntity();
DstEntityManager.AddComponentData(dstEntity0, entityGuid1);
Assert.DoesNotThrow(() => { EntityPatcher.ApplyChangeSet(DstEntityManager, forward); });
}
}
}
public void EntityPatcher_ApplyChanges_EntityPatchWithMissingValueDoesNotThrow()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entityGuid0 = CreateEntityGuid();
var entity0 = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity0, entityGuid0);
var entityGuid1 = CreateEntityGuid();
var entity1 = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity1, entityGuid1);
PushChanges(differ, DstEntityManager);
// Create a component with an entity reference
SrcEntityManager.AddComponentData(entity1, new EcsTestDataEntity {
value1 = entity0
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.IncludeForwardChangeSet, Allocator.TempJob))
{
var forward = changes.ForwardChangeSet;
Assert.That(forward.EntityReferenceChanges.Length, Is.EqualTo(1));
// Destroy the entity the patch references
SrcEntityManager.DestroyEntity(entity0);
Assert.DoesNotThrow(() => { EntityPatcher.ApplyChangeSet(DstEntityManager, forward); });
}
}
}
public void EntityDiffer_GetChanges_CreateEntityAndSetComponentData_WithFastForward_ManagedComponents()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestData), typeof(EcsTestManagedComponent));
var entityGuid = CreateEntityGuid();
SrcEntityManager.SetComponentData(entity, entityGuid);
SrcEntityManager.SetComponentData(entity, new EcsTestData {
value = 9
});
SrcEntityManager.SetComponentData(entity, new EcsTestManagedComponent {
value = "SomeString"
});
const EntityManagerDifferOptions options = EntityManagerDifferOptions.IncludeForwardChangeSet |
EntityManagerDifferOptions.IncludeReverseChangeSet |
EntityManagerDifferOptions.FastForwardShadowWorld;
using (var changes = differ.GetChanges(options, Allocator.Temp))
{
// Forward changes is all changes needed to go from the shadow state to the current state.
Assert.IsTrue(changes.HasForwardChangeSet);
Assert.AreEqual(0, changes.ForwardChangeSet.DestroyedEntityCount);
Assert.AreEqual(1, changes.ForwardChangeSet.CreatedEntityCount);
Assert.AreEqual(3, changes.ForwardChangeSet.AddComponents.Length);
Assert.AreEqual(2, changes.ForwardChangeSet.SetComponents.Length);
Assert.AreEqual(1, changes.ForwardChangeSet.SetManagedComponents.Length);
// Reverse changes is all changes needed to go from the current state back to the last shadow state. (i.e. Undo)
Assert.IsTrue(changes.HasReverseChangeSet);
Assert.AreEqual(1, changes.ReverseChangeSet.DestroyedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.CreatedEntityCount);
Assert.AreEqual(0, changes.ReverseChangeSet.AddComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.SetComponents.Length);
Assert.AreEqual(0, changes.ReverseChangeSet.SetManagedComponents.Length);
}
// The inner shadow world was updated during the last call which means no new changes should be found.
using (var changes = differ.GetChanges(options, Allocator.Temp))
{
Assert.IsFalse(changes.AnyChanges);
}
}
}
public void EntityPatcher_ApplyChanges_WithChunkData_ManagedComponents()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var guid = CreateEntityGuid();
var entity = SrcEntityManager.CreateEntity();
Entity dstRootEntity;
// Chunk component is added but no values are copied
// Because chunks are generally caches and thus must be rebuildable automatically.
// They are also likely a totally different set of chunks.
// Diff & Patch is generally working against entities not on chunk level
{
SrcEntityManager.AddComponentData(entity, guid);
SrcEntityManager.AddComponentData(entity, new EcsTestData(1));
SrcEntityManager.AddChunkComponentData <EcsTestData2>(entity);
SrcEntityManager.SetChunkComponentData(SrcEntityManager.GetChunk(entity), new EcsTestData2(3));
SrcEntityManager.AddChunkComponentData <EcsTestManagedComponent>(entity);
SrcEntityManager.SetChunkComponentData(SrcEntityManager.GetChunk(entity), new EcsTestManagedComponent()
{
value = "SomeString"
});
PushChanges(differ, DstEntityManager);
dstRootEntity = GetEntity(DstEntityManager, guid);
Assert.AreEqual(1, DstEntityManager.GetComponentData <EcsTestData>(dstRootEntity).value);
Assert.IsTrue(DstEntityManager.HasChunkComponent <EcsTestData2>(dstRootEntity));
Assert.IsTrue(DstEntityManager.HasChunkComponent <EcsTestManagedComponent>(dstRootEntity));
Assert.AreEqual(0, DstEntityManager.GetChunkComponentData <EcsTestData2>(dstRootEntity).value0);
Assert.AreEqual(null, DstEntityManager.GetChunkComponentData <EcsTestManagedComponent>(dstRootEntity));
Assert.AreEqual(1, DstEntityManager.CreateEntityQuery(typeof(ChunkHeader)).CalculateEntityCount());
}
// Changing Chunk component creates no diff
{
SrcEntityManager.SetChunkComponentData(SrcEntityManager.GetChunk(entity), new EcsTestData2(7));
SrcEntityManager.SetChunkComponentData(SrcEntityManager.GetChunk(entity), new EcsTestManagedComponent()
{
value = "SomeOtherString"
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsFalse(changes.AnyChanges);
}
}
// Removing chunk component, removes chunk component again
{
SrcEntityManager.RemoveChunkComponent <EcsTestData2>(entity);
SrcEntityManager.RemoveChunkComponent <EcsTestManagedComponent>(entity);
PushChanges(differ, DstEntityManager);
Assert.IsFalse(DstEntityManager.HasChunkComponent <EcsTestData2>(dstRootEntity));
Assert.IsFalse(DstEntityManager.HasChunkComponent <EcsTestManagedComponent>(dstRootEntity));
Assert.AreEqual(0, DstEntityManager.CreateEntityQuery(typeof(ChunkHeader)).CalculateEntityCount());
}
}
}
public void CanSerializeAndDeserializeManagedComponents()
{
using (var differ = new EntityManagerDiffer(SrcWorld.EntityManager, Allocator.TempJob))
{
var entityGuid = CreateEntityGuid();
var entity = SrcEntityManager.CreateEntity();
var srcManagedComponent = new EcsTestManagedDataEntity
{
value0 = "Hello",
value2 = 42,
nullField = new ClassWithClassFields
{
ClassWithString = new ClassWithString
{
String = "World"
}
}
};
SrcEntityManager.AddComponentData(entity, entityGuid);
SrcEntityManager.AddComponentData(entity, srcManagedComponent);
SrcEntityManager.AddComponentData(entity, (EcsTestManagedComponent2)null);
var options = EntityManagerDifferOptions.IncludeForwardChangeSet | EntityManagerDifferOptions.FastForwardShadowWorld;
using (var changes = differ.GetChanges(options, Allocator.TempJob))
{
var srcChange = new LiveLinkChangeSet
{
Changes = changes.ForwardChangeSet,
SceneName = "Boing",
UnloadAllPreviousEntities = true,
SceneGUID = new Unity.Entities.Hash128(),
FramesToRetainBlobAssets = 1
};
var changeSet = SerializeAndDeserialize(srcChange);
AssertChangeSetsAreEqual(srcChange, changeSet);
EntityPatcher.ApplyChangeSet(DstEntityManager, changeSet.Changes);
changeSet.Dispose();
}
var dstManagedComponent = GetManagedComponentData <EcsTestManagedDataEntity>(DstEntityManager, entityGuid);
Assert.That(dstManagedComponent, Is.Not.Null);
Assert.That(dstManagedComponent, Is.Not.SameAs(srcManagedComponent));
Assert.That(dstManagedComponent.value0, Is.EqualTo(srcManagedComponent.value0));
Assert.That(dstManagedComponent.value1, Is.EqualTo(srcManagedComponent.value1));
Assert.That(dstManagedComponent.value2, Is.EqualTo(srcManagedComponent.value2));
Assert.That(dstManagedComponent.nullField, Is.Not.SameAs(srcManagedComponent.nullField));
Assert.That(dstManagedComponent.nullField.ClassWithString, Is.Not.SameAs(srcManagedComponent.nullField.ClassWithString));
Assert.That(dstManagedComponent.nullField.ClassWithString.String, Is.EqualTo(srcManagedComponent.nullField.ClassWithString.String));
Assert.That(GetManagedComponentData <EcsTestManagedComponent2>(DstEntityManager, entityGuid), Is.Null);
}
}
public unsafe void EntityDiffer_GetChanges_BlobAssets_SetComponent_TypeMemoryOrdering()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var blobAssetReferences = new NativeArray <BlobAssetReference <int> >(100, Allocator.Temp);
for (var i = 0; i < blobAssetReferences.Length; i++)
{
// Construct the archetype in an order which will NOT match the memory order.
var archetype = SrcEntityManager.CreateArchetype(
typeof(EntityGuid),
typeof(EcsTestDataBlobAssetRef),
typeof(EcsTestData4));
// Validate the assumption that the archetype is created in this way.
Assert.That(archetype.Archetype->TypeMemoryOrder[0], Is.EqualTo(0));
Assert.That(archetype.Archetype->TypeMemoryOrder[1], Is.EqualTo(2));
Assert.That(archetype.Archetype->TypeMemoryOrder[2], Is.EqualTo(1));
// Validate the component sizes are different
Assert.That(UnsafeUtility.SizeOf <EcsTestDataBlobAssetRef>(), Is.Not.EqualTo(UnsafeUtility.SizeOf <EcsTestData4>()));
var entity = SrcEntityManager.CreateEntity(archetype);
blobAssetReferences[i] = BlobAssetReference <int> .Create(i);
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity, new EcsTestData4());
SrcEntityManager.SetComponentData(entity, new EcsTestDataBlobAssetRef
{
value = blobAssetReferences[i]
});
}
try
{
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(100));
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(100));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(sizeof(int) * 100));
}
}
finally
{
for (var i = 0; i < blobAssetReferences.Length; i++)
{
blobAssetReferences[i].Dispose();
}
blobAssetReferences.Dispose();
}
}
}
public void EntityDiffer_GetChanges_NoChanges()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsFalse(changes.AnyChanges);
}
}
}
public void EntityDiffer_GetChanges_BlobAssets_SetBuffer_MultipleEntities()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var blobAssetReferences = new NativeArray <BlobAssetReference <int> >(100, Allocator.Temp);
for (var i = 0; i < blobAssetReferences.Length; i++)
{
blobAssetReferences[i] = BlobAssetReference <int> .Create(i);
}
for (var i = 0; i < blobAssetReferences.Length; i += 4)
{
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid));
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
var buffer = SrcEntityManager.AddBuffer <EcsTestDataBlobAssetElement>(entity);
buffer.Add(new EcsTestDataBlobAssetElement {
blobElement = blobAssetReferences[i + 0]
});
buffer.Add(new EcsTestDataBlobAssetElement {
blobElement = blobAssetReferences[i + 1]
});
buffer.Add(new EcsTestDataBlobAssetElement {
blobElement = blobAssetReferences[i + 2]
});
buffer.Add(new EcsTestDataBlobAssetElement {
blobElement = blobAssetReferences[i + 3]
});
}
try
{
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(100));
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(100));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(sizeof(int) * 100));
}
}
finally
{
for (var i = 0; i < blobAssetReferences.Length; i++)
{
blobAssetReferences[i].Dispose();
}
blobAssetReferences.Dispose();
}
}
}
public void EntityDiffer_AddingZeroSizeComponentToWholeChunk()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
for (int i = 0; i != 10; i++)
{
var entityGuid = CreateEntityGuid();
var entity = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity, entityGuid);
}
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp)) {}
SrcEntityManager.AddSharedComponentData(SrcEntityManager.UniversalQuery, new SharedData1(9));
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.AnyChanges);
Assert.AreEqual(10, changes.ForwardChangeSet.AddComponents.Length);
}
}
}
/// <summary>
/// Pushes forward changes from the tracker to the applier.
/// </summary>
protected static void PushChanges(EntityManagerDiffer differ, EntityManagerPatcher patcher, bool fastForward = true)
{
var options = EntityManagerDifferOptions.IncludeForwardChangeSet;
if (fastForward)
{
options |= EntityManagerDifferOptions.FastForwardShadowWorld;
}
using (var changes = differ.GetChanges(options, Allocator.TempJob))
{
patcher.ApplyChangeSet(changes.ForwardChangeSet);
}
}
public void PerformanceTest_EntityDiffer_GetChanges_NoChanges(int entityCount)
{
CreateEntitiesWithMockComponentData(SrcEntityManager, entityCount, typeof(EcsTestData), typeof(EcsTestData2), typeof(EcsTestSharedComp));
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
// Fast forward the shadow world
using (differ.GetChanges(EntityManagerDifferOptions.FastForwardShadowWorld, Allocator.TempJob))
{
}
Measure.Method(() =>
{
// Get changes with all options selected
using (differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.TempJob))
{
}
})
.Definition("EntityDiffer")
.WarmupCount(1)
.MeasurementCount(100)
.Run();
}
}
public void PerformanceTest_EntityDiffer_GetChanges_DefaultOptions(int entityCount)
{
CreateEntitiesWithMockComponentData(SrcEntityManager, entityCount, typeof(EcsTestData), typeof(EcsTestData2), typeof(EcsTestSharedComp));
Measure.Method(() =>
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
using (differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.TempJob))
{
}
}
})
.ProfilerMarkers("EntityDiffer")
.WarmupCount(1)
.MeasurementCount(100)
.Run();
}
public void EntityDiffer_GetChanges_BlobAssets_SetComponent_Null()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestDataBlobAssetRef));
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(1));
Assert.That(forward.BlobAssetReferenceChanges[0].Value, Is.EqualTo(0));
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(0));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(0));
}
}
}
public void PerformanceTest_EntityDiffer_GetChanges_FastForwardOnly(int entityCount)
{
CreateEntitiesWithMockComponentData(SrcEntityManager, entityCount, typeof(EcsTestData), typeof(EcsTestData2), typeof(EcsTestSharedComp));
Measure.Method(() =>
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
using (differ.GetChanges(EntityManagerDifferOptions.FastForwardShadowWorld, Allocator.TempJob))
{
}
}
})
.Definition("EntityDiffer")
.WarmupCount(1)
.MeasurementCount(100)
.Run();
}
public void PerformanceTest_EntityDiffer_GetChanges_ReferentialEquality(int entityCount)
{
CreateEntitiesWithMockComponentData(SrcEntityManager, entityCount, typeof(EcsTestData), typeof(EcsTestData2), typeof(EcsTestSharedComp), typeof(EcsTestDataEntity));
Measure.Method(() =>
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
using (differ.GetChanges(EntityManagerDifferOptions.Default | EntityManagerDifferOptions.UseReferentialEquality, Allocator.TempJob))
{
}
}
})
.SampleGroup("EntityDiffer")
.WarmupCount(1)
.MeasurementCount(100)
.Run();
}
public void EntityManagerDiffer_GetChanges_DuplicateEntityGuidThrows()
{
using (var tracker = new EntityManagerDiffer(SrcWorld, Allocator.TempJob))
{
var entityGuid = CreateEntityGuid();
var entity0 = SrcEntityManager.CreateEntity(typeof(EntityGuid));
var entity1 = SrcEntityManager.CreateEntity(typeof(EntityGuid));
SrcEntityManager.SetComponentData(entity0, entityGuid);
SrcEntityManager.SetComponentData(entity1, entityGuid);
Assert.Throws <DuplicateEntityGuidException>(() =>
{
using (tracker.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
}
});
}
}
public void PatchWithObjectReferenceResolving()
{
var material = AssetDatabase.LoadAssetAtPath <Material>("Packages/com.unity.entities/Unity.Scenes.Hybrid.Tests/Test.mat");
using (var differ = new EntityManagerDiffer(SrcWorld.EntityManager, Allocator.TempJob))
{
var entityGuid = CreateEntityGuid();
var entity = SrcEntityManager.CreateEntity();
SrcEntityManager.AddComponentData(entity, entityGuid);
SrcEntityManager.AddSharedComponentData(entity, new ComponentWithObjectRef {
Material = material
});
SrcEntityManager.AddComponentData(entity, new EcsTestData(5));
var options = EntityManagerDifferOptions.IncludeForwardChangeSet | EntityManagerDifferOptions.FastForwardShadowWorld;
using (var changes = differ.GetChanges(options, Allocator.TempJob))
{
var srcChange = new LiveLinkChangeSet
{
Changes = changes.ForwardChangeSet,
SceneName = "Boing",
UnloadAllPreviousEntities = true,
SceneGUID = new Unity.Entities.Hash128(),
FramesToRetainBlobAssets = 1
};
var changeSet = SerializeAndDeserialize(srcChange);
AssertChangeSetsAreEqual(srcChange, changeSet);
EntityPatcher.ApplyChangeSet(DstEntityManager, changeSet.Changes);
changeSet.Dispose();
}
var dstMaterial = GetSharedComponentData <ComponentWithObjectRef>(DstEntityManager, entityGuid).Material;
Assert.AreEqual(material, dstMaterial);
Assert.AreEqual(5, GetComponentData <EcsTestData>(DstEntityManager, entityGuid).value);
}
}
public void EntityDiffer_GetChanges_DuplicateEntityGuidThrows()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
void GetChanges()
{
using (differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp)) { }
}
var entityGuid0 = CreateEntityGuid();
var entityGuid1 = CreateEntityGuid();
var entityGuid2 = CreateEntityGuid();
var entityGuid3 = CreateEntityGuid();
var entity0 = SrcEntityManager.CreateEntity(typeof(EntityGuid));
var entity1 = SrcEntityManager.CreateEntity(typeof(EntityGuid));
var entity2 = SrcEntityManager.CreateEntity(typeof(EntityGuid));
var entity3 = SrcEntityManager.CreateEntity(typeof(EntityGuid));
SrcEntityManager.SetComponentData(entity0, entityGuid0);
SrcEntityManager.SetComponentData(entity1, entityGuid1);
SrcEntityManager.SetComponentData(entity2, entityGuid2);
SrcEntityManager.SetComponentData(entity3, entityGuid3);
Assert.DoesNotThrow(GetChanges);
SrcEntityManager.SetComponentData(entity1, entityGuid0);
SrcEntityManager.SetComponentData(entity2, entityGuid0);
SrcEntityManager.SetComponentData(entity3, entityGuid0);
var dup0 = Assert.Throws <DuplicateEntityGuidException>(GetChanges).DuplicateEntityGuids;
Assert.That(dup0, Is.EquivalentTo(new[] { new DuplicateEntityGuid(entityGuid0, 3) }));
SrcEntityManager.SetComponentData(entity0, entityGuid1);
SrcEntityManager.SetComponentData(entity3, entityGuid1);
var dup1 = Assert.Throws <DuplicateEntityGuidException>(GetChanges).DuplicateEntityGuids;
Assert.That(dup1, Is.EquivalentTo(new[] { new DuplicateEntityGuid(entityGuid0, 1), new DuplicateEntityGuid(entityGuid1, 1) }));
}
}
public unsafe void EntityDiffer_GetChanges_BlobAssets_SetComponent()
{
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
var blobAssetReference0 = BlobAssetReference <int> .Create(10);
var entity = SrcEntityManager.CreateEntity(typeof(EntityGuid), typeof(EcsTestDataBlobAssetRef));
SrcEntityManager.SetComponentData(entity, CreateEntityGuid());
SrcEntityManager.SetComponentData(entity, new EcsTestDataBlobAssetRef
{
value = blobAssetReference0
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(1));
Assert.That(forward.DestroyedBlobAssets.Length, Is.EqualTo(0));
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(1));
Assert.That(forward.BlobAssetReferenceChanges[0].Value, Is.EqualTo(forward.CreatedBlobAssets[0].Hash));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(sizeof(int)));
Assert.That(*(int *)forward.BlobAssetData.GetUnsafePtr(), Is.EqualTo(10));
}
blobAssetReference0.Release();
var blobAssetReference1 = BlobAssetReference <int> .Create(20);
SrcEntityManager.SetComponentData(entity, new EcsTestDataBlobAssetRef
{
value = blobAssetReference1
});
using (var changes = differ.GetChanges(EntityManagerDifferOptions.Default, Allocator.Temp))
{
Assert.IsTrue(changes.HasForwardChangeSet);
var forward = changes.ForwardChangeSet;
Assert.That(forward.CreatedBlobAssets.Length, Is.EqualTo(1));
Assert.That(forward.BlobAssetReferenceChanges.Length, Is.EqualTo(1));
Assert.That(forward.BlobAssetData.Length, Is.EqualTo(sizeof(int)));
Assert.That(*(int *)forward.BlobAssetData.GetUnsafePtr(), Is.EqualTo(20));
Assert.That(forward.BlobAssetReferenceChanges[0].Value, Is.EqualTo(forward.CreatedBlobAssets[0].Hash));
Assert.IsTrue(changes.HasReverseChangeSet);
var reverse = changes.ReverseChangeSet;
Assert.That(reverse.CreatedBlobAssets.Length, Is.EqualTo(1));
Assert.That(reverse.BlobAssetReferenceChanges.Length, Is.EqualTo(1));
Assert.That(reverse.BlobAssetData.Length, Is.EqualTo(sizeof(int)));
Assert.That(*(int *)reverse.BlobAssetData.GetUnsafePtr(), Is.EqualTo(10));
Assert.That(reverse.BlobAssetReferenceChanges[0].Value, Is.EqualTo(reverse.CreatedBlobAssets[0].Hash));
}
blobAssetReference1.Release();
}
}
public void UndoRedoPrefabInstancesWithRelationship()
{
const int instanceCount = 10;
var srcPrefabRootGuid = CreateEntityGuid();
var srcPrefabLevel0Guid = CreateEntityGuid();
var prefabLevel1Guid = CreateEntityGuid();
const EntityManagerDifferOptions options = EntityManagerDifferOptions.IncludeForwardChangeSet |
EntityManagerDifferOptions.FastForwardShadowWorld;
using (var differ = new EntityManagerDiffer(SrcEntityManager, Allocator.TempJob))
{
// Create Root Prefab entity with a Guid component
var srcPrefabRoot = SrcEntityManager.CreateEntity(typeof(HierarchyComponent), typeof(Prefab), typeof(LinkedEntityGroup));
SrcEntityManager.AddComponentData(srcPrefabRoot, srcPrefabRootGuid);
SrcEntityManager.GetBuffer <LinkedEntityGroup>(srcPrefabRoot).Add(srcPrefabRoot);
PushChanges(differ, DstEntityManager);
using (var changes = differ.GetChanges(options, Allocator.TempJob))
{
EntityPatcher.ApplyChangeSet(DstEntityManager, changes.ForwardChangeSet);
}
// Instantiate root prefab in dst world 10 times
var dstPrefabRoot = GetEntity(DstEntityManager, srcPrefabRootGuid);
var dstInstanceRoots = new Entity[instanceCount];
for (var i = 0; i != dstInstanceRoots.Length; i++)
{
var dstInstanceRoot = DstEntityManager.Instantiate(dstPrefabRoot);
dstInstanceRoots[i] = dstInstanceRoot;
Assert.AreEqual(1, DstEntityManager.GetBuffer <LinkedEntityGroup>(dstInstanceRoot).Length);
Assert.AreEqual(dstInstanceRoot, DstEntityManager.GetBuffer <LinkedEntityGroup>(dstInstanceRoot)[0].Value);
}
// Add level 0 entity to the prefab
var srcLevel0Prefab = SrcEntityManager.CreateEntity(typeof(HierarchyComponent), typeof(Prefab));
SrcEntityManager.AddComponentData(srcLevel0Prefab, srcPrefabLevel0Guid);
SrcEntityManager.GetBuffer <LinkedEntityGroup>(srcPrefabRoot).Add(srcLevel0Prefab);
SrcEntityManager.SetComponentData(srcPrefabRoot, new HierarchyComponent {
Parent = Entity.Null, Child = srcLevel0Prefab
});
SrcEntityManager.SetComponentData(srcLevel0Prefab, new HierarchyComponent {
Parent = srcPrefabRoot, Child = Entity.Null
});
// Synchronize worlds, we now should have 10 instances in the world along with a level0 for each
// and hierarchy matching the relationships create
PushChanges(differ, DstEntityManager);
for (var i = 0; i != dstInstanceRoots.Length; i++)
{
var dstInstanceRoot = dstInstanceRoots[i];
var dstInstanceGroup = DstEntityManager.GetBuffer <LinkedEntityGroup>(dstInstanceRoot);
var dstInstanceLevel0 = dstInstanceGroup[1].Value;
Assert.AreEqual(2, dstInstanceGroup.Length);
Assert.AreEqual(dstInstanceRoot, dstInstanceGroup[0].Value);
Assert.AreEqual(dstInstanceLevel0, dstInstanceGroup[1].Value);
var hierarchyLevel0 = DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel0);
var hierarchyRoot = DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceRoot);
Assert.AreEqual(dstInstanceRoot, hierarchyLevel0.Parent);
Assert.AreEqual(dstInstanceLevel0, hierarchyRoot.Child);
}
// Add level 1 entity to the prefab
var srcLevel1Prefab = SrcEntityManager.CreateEntity(typeof(HierarchyComponent), typeof(Prefab));
SrcEntityManager.AddComponentData(srcLevel1Prefab, prefabLevel1Guid);
SrcEntityManager.GetBuffer <LinkedEntityGroup>(srcPrefabRoot).Add(srcLevel1Prefab);
SrcEntityManager.SetComponentData(srcLevel0Prefab, new HierarchyComponent {
Parent = srcPrefabRoot, Child = srcLevel1Prefab
});
SrcEntityManager.SetComponentData(srcLevel1Prefab, new HierarchyComponent {
Parent = srcLevel0Prefab, Child = Entity.Null
});
// Synchronize worlds, we now should have 10 instances of level 1 linked to their matching level 0
PushChanges(differ, DstEntityManager);
for (var i = 0; i != dstInstanceRoots.Length; i++)
{
var dstRootInstance = dstInstanceRoots[i];
var dstInstanceGroup = DstEntityManager.GetBuffer <LinkedEntityGroup>(dstRootInstance);
Assert.AreEqual(3, dstInstanceGroup.Length);
Assert.AreEqual(dstRootInstance, dstInstanceGroup[0].Value);
var dstInstanceLevel0 = dstInstanceGroup[1].Value;
var dstInstanceLevel1 = dstInstanceGroup[2].Value;
Assert.AreEqual(dstInstanceLevel0, DstEntityManager.GetComponentData <HierarchyComponent>(dstRootInstance).Child);
Assert.AreEqual(dstRootInstance, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel0).Parent);
Assert.AreEqual(dstInstanceLevel1, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel0).Child);
Assert.AreEqual(dstInstanceLevel0, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel1).Parent);
}
// Remove level 1 entity from the prefab
SrcEntityManager.GetBuffer <LinkedEntityGroup>(srcPrefabRoot).RemoveAt(2);
SrcEntityManager.DestroyEntity(srcLevel1Prefab);
// Fix the hierarchy of level 0 to remove the link to level 1
SrcEntityManager.SetComponentData(srcLevel0Prefab, new HierarchyComponent {
Parent = srcPrefabRoot, Child = Entity.Null
});
// Synchronize worlds, destination world should no longer have instances of level 1
PushChanges(differ, DstEntityManager);
for (var i = 0; i != dstInstanceRoots.Length; i++)
{
var dstRootInstance = dstInstanceRoots[i];
var dstInstanceGroup = DstEntityManager.GetBuffer <LinkedEntityGroup>(dstRootInstance);
Assert.AreEqual(2, dstInstanceGroup.Length);
Assert.AreEqual(dstRootInstance, dstInstanceGroup[0].Value);
var dstInstanceLevel1 = dstInstanceGroup[1].Value;
Assert.AreEqual(dstInstanceLevel1, DstEntityManager.GetComponentData <HierarchyComponent>(dstRootInstance).Child);
Assert.AreEqual(dstRootInstance, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel1).Parent);
Assert.AreEqual(Entity.Null, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel1).Child);
}
// Add again level 1 as a Child of level 0
srcLevel1Prefab = SrcEntityManager.CreateEntity(typeof(HierarchyComponent), typeof(Prefab));
SrcEntityManager.AddComponentData(srcLevel1Prefab, prefabLevel1Guid);
SrcEntityManager.GetBuffer <LinkedEntityGroup>(srcPrefabRoot).Add(srcLevel1Prefab);
SrcEntityManager.SetComponentData(srcLevel0Prefab, new HierarchyComponent {
Parent = srcPrefabRoot, Child = srcLevel1Prefab
});
SrcEntityManager.SetComponentData(srcLevel1Prefab, new HierarchyComponent {
Parent = srcLevel0Prefab, Child = Entity.Null
});
PushChanges(differ, DstEntityManager);
for (var i = 0; i != dstInstanceRoots.Length; i++)
{
var dstRootInstance = dstInstanceRoots[i];
var dstInstanceGroup = DstEntityManager.GetBuffer <LinkedEntityGroup>(dstRootInstance);
Assert.AreEqual(3, dstInstanceGroup.Length);
Assert.AreEqual(dstRootInstance, dstInstanceGroup[0].Value);
var dstInstanceLevel0 = dstInstanceGroup[1].Value;
var dstInstanceLevel1 = dstInstanceGroup[2].Value;
Assert.AreEqual(dstInstanceLevel0, DstEntityManager.GetComponentData <HierarchyComponent>(dstRootInstance).Child);
Assert.AreEqual(dstRootInstance, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel0).Parent);
Assert.AreEqual(dstInstanceLevel1, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel0).Child);
Assert.AreEqual(dstInstanceLevel0, DstEntityManager.GetComponentData <HierarchyComponent>(dstInstanceLevel1).Parent);
}
}
}
