Add Test Case: LayerColor should not occlude sprites and labels when depth test is true

samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.cpp

@@ -25,6 +25,7 @@ static std::function<Layer*()> createFunctions[] = {
     CL(LayerExtendedBlendOpacityTest),
     CL(LayerBug3162A),
     CL(LayerBug3162B),
+    CL(LayerColorOccludeBug),
 };
 
 static int sceneIdx=-1;
@@ -954,3 +955,27 @@ std::string LayerBug3162B::subtitle() const
 {
     return "u and m layer color is effected/diseffected with b layer";
 }
+
+std::string LayerColorOccludeBug::title() const
+{
+    return "Layer Color Occlude Bug Test";
+}
+
+std::string LayerColorOccludeBug::subtitle() const
+{
+    return  "Layer Color Should not occlude titles and any sprites";
+}
+
+void LayerColorOccludeBug::onEnter()
+{
+    LayerTest::onEnter();
+    Director::getInstance()->setDepthTest(true);
+    _layer = LayerColor::create(Color4B(0, 80, 95, 255));
+    addChild(_layer);
+}
+
+void LayerColorOccludeBug::onExit()
+{
+    LayerTest::onExit();
+    Director::getInstance()->setDepthTest(false);
+}

samples/Cpp/TestCpp/Classes/LayerTest/LayerTest.h

@@ -202,6 +202,19 @@ private:
     LayerColor* _layer[3];
 };
 
+class LayerColorOccludeBug : public LayerTest
+{
+public:
+    CREATE_FUNC(LayerColorOccludeBug);
+    virtual void onEnter() override;
+    virtual void onExit() override;
+    virtual std::string title() const override;
+    virtual std::string subtitle() const override;
+    
+private:
+    LayerColor* _layer;
+};
+
 class LayerTestScene : public TestScene
 {
 public: