Add stage interface getter

Author: adazem009

include/scratchcpp/stage.h

@@ -27,6 +27,7 @@ class LIBSCRATCHCPP_EXPORT Stage : public Target
         Stage(const Stage &) = delete;
 
         void setInterface(IStageHandler *newInterface);
+        IStageHandler *getInterface() const; // NOTE: This can't be called interface because of... Microsoft... (it wouldn't compile on Windows)
 
         bool isStage() const override;
 

src/scratch/stage.cpp

@@ -24,6 +24,12 @@ void Stage::setInterface(IStageHandler *newInterface)
     impl->iface->init(this);
 }
 
+/*! Returns the stage interface. */
+IStageHandler *Stage::getInterface() const
+{
+    return impl->iface;
+}
+
 /*! Returns true. */
 bool Stage::isStage() const
 {

test/scratch_classes/stage_test.cpp

@@ -2,6 +2,7 @@
 #include <scratchcpp/costume.h>
 #include <enginemock.h>
 #include <graphicseffectmock.h>
+#include <stagehandlermock.h>
 
 #include "../common.h"
 
@@ -13,6 +14,17 @@ TEST(StageTest, IsStage)
     ASSERT_TRUE(stage.isStage());
 }
 
+TEST(SpriteTest, Interface)
+{
+    Stage stage;
+    ASSERT_EQ(stage.getInterface(), nullptr);
+
+    StageHandlerMock handler;
+    EXPECT_CALL(handler, init);
+    stage.setInterface(&handler);
+    ASSERT_EQ(stage.getInterface(), &handler);
+}
+
 TEST(SpriteTest, CostumeIndex)
 {
     Stage stage;