Use animation rather than event to drive simulation

Using events can be problematic as they contribute to flooding
of the event queue leading to issues with running animations.
So we now use an actual animation which runs in a loop and triggers
every 1ms (rendering still vsync locked though).
If animation have not been enabled for the qt build, we fall back
to using events as before.

Tests were changes since frame progress is no longer driven by
events, so processEvents does not trigger a frame update.

Change-Id: I89b11862ef432dffae0c3dfb140eedd61754697e
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/auto/core/nodes/tst_nodes.cpp b/tests/auto/core/nodes/tst_nodes.cpp
index b5291cab7..43d9f7778 100644
--- a/tests/auto/core/nodes/tst_nodes.cpp
+++ b/tests/auto/core/nodes/tst_nodes.cpp
@@ -944,6 +944,7 @@ void tst_Nodes::checkParentChangeFromExistingBackendParentToNewlyCreatedParent()
     // GIVEN
     ObserverSpy spy;
     Qt3DCore::QAspectEngine engine;
+    engine.setRunMode(Qt3DCore::QAspectEngine::Manual);
     QScopedPointer<MyQEntity> root(new MyQEntity());
     root->setArbiterAndEngine(&spy, &engine);
     auto aspect = new TestAspect;
@@ -953,6 +954,7 @@ void tst_Nodes::checkParentChangeFromExistingBackendParentToNewlyCreatedParent()
     MyQNode *child2(new MyQNode(root.data()));
 
     QCoreApplication::processEvents();
+    engine.processFrame();
 
     // Due to the way we create root, it has a backend
     QVERIFY(Qt3DCore::QNodePrivate::get(root.data())->m_hasBackendNode == true);
@@ -983,6 +985,7 @@ void tst_Nodes::checkParentChangeFromExistingBackendParentToNewlyCreatedParent()
 
     // WHEN
     QCoreApplication::processEvents();
+    engine.processFrame();
 
     // THEN
     QCOMPARE(spy.events.size(), 2);
@@ -1059,6 +1062,7 @@ void tst_Nodes::checkParentChangeFromExistingBackendParentToNewlyCreatedParent()
 
     // WHEN
     QCoreApplication::processEvents();
+    engine.processFrame();
 
     // THEN
     QCOMPARE(spy.events.size(), 2);
@@ -1237,6 +1241,7 @@ void tst_Nodes::checkAllBackendCreationDoneInSingleFrame()
     // GIVEN
     ObserverSpy spy;
     Qt3DCore::QAspectEngine engine;
+    engine.setRunMode(Qt3DCore::QAspectEngine::Manual);
     auto aspect = new TestAspect;
     engine.registerAspect(aspect);
 
@@ -1269,6 +1274,7 @@ void tst_Nodes::checkAllBackendCreationDoneInSingleFrame()
 
     // WHEN
     QCoreApplication::processEvents();
+    engine.processFrame();
 
     // THEN - both children have their backend nodes actually created.
     QCOMPARE(aspect->events.count(), 2);