Add jointCount property to QAbstractSkeleton

Set this from the backend when a skeleton is loaded.

Change-Id: I752670b93b6ae1fad70534b5f8983ae2ca86fd78
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 43 insertions, 2 deletions

diff --git a/tests/auto/core/qskeleton/tst_qskeleton.cpp b/tests/auto/core/qskeleton/tst_qskeleton.cpp
index 3d1758716..f66e07cbe 100644
--- a/tests/auto/core/qskeleton/tst_qskeleton.cpp
+++ b/tests/auto/core/qskeleton/tst_qskeleton.cpp
@@ -38,11 +38,12 @@
 #include <Qt3DCore/private/qscene_p.h>
 #include <Qt3DCore/private/qnodecreatedchangegenerator_p.h>
 
-#include "testpostmanarbiter.h"
+#include <QSignalSpy>
+#include <testpostmanarbiter.h>
 
 using namespace Qt3DCore;
 
-class tst_QSkeleton: public QObject
+class tst_QSkeleton: public QSkeleton
 {
     Q_OBJECT
 public:
@@ -52,6 +53,14 @@ public:
     }
 
 private Q_SLOTS:
+    void checkDefaultConstruction()
+    {
+        // GIVEN
+        QSkeleton skeleton;
+
+        // THEN
+        QCOMPARE(skeleton.jointCount(), 0);
+    }
 
     void checkCreationChange_data()
     {
@@ -162,6 +171,38 @@ private Q_SLOTS:
             // THEN Should not crash when the joint is destroyed (tests for failed removal of destruction helper)
         }
     }
+
+    void checkJointCountPropertyUpdate()
+    {
+        // GIVEN
+        TestArbiter arbiter;
+        arbiter.setArbiterOnNode(this);
+        QSignalSpy spy(this, SIGNAL(jointCountChanged(int)));
+        const int newJointCount = 99;
+
+        // THEN
+        QVERIFY(spy.isValid());
+
+        // WHEN
+        auto valueChange = QPropertyUpdatedChangePtr::create(Qt3DCore::QNodeId());
+        valueChange->setPropertyName("jointCount");
+        valueChange->setValue(QVariant(newJointCount));
+        sceneChangeEvent(valueChange);
+
+        // THEN
+        QCOMPARE(spy.count(), 1);
+        QCOMPARE(arbiter.events.size(), 0);
+        QCOMPARE(jointCount(), newJointCount);
+
+        // WHEN
+        spy.clear();
+        sceneChangeEvent(valueChange);
+
+        // THEN
+        QCOMPARE(spy.count(), 0);
+        QCOMPARE(arbiter.events.size(), 0);
+        QCOMPARE(jointCount(), newJointCount);
+    }
 };
 
 QTEST_MAIN(tst_QSkeleton)