Tested indirect calls from native code of overrides in the target language.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

tests/CSharp/CSharp.Tests.cs

@@ -1217,6 +1217,27 @@ public unsafe class CSharpTests : GeneratorTestFixture
         }
     }
 
+    [Test]
+    public void TestVirtualIndirectCallInNative()
+    {
+        using (Inter i = new Inter())
+        {
+            using (InterfaceTester tester = new InterfaceTester())
+            {
+                tester.SetInterface(i);
+                Assert.That(tester.Get(10), Is.EqualTo(IntPtr.Zero));
+            }
+        }
+    }
+
+    public class Inter : SimpleInterface
+    {
+        public override int Size => s;
+        public override int Capacity => s;
+        public override IntPtr Get(int n) { return new IntPtr(0); }
+        private int s = 0;
+    }
+
     private class OverrideVirtualTemplate : VirtualTemplate<int>
     {
         public override int Function

tests/CSharp/CSharp.cpp

@@ -1495,3 +1495,39 @@ HasFixedArrayOfPointers::HasFixedArrayOfPointers()
 HasFixedArrayOfPointers::~HasFixedArrayOfPointers()
 {
 }
+
+SimpleInterface::SimpleInterface()
+{
+}
+
+SimpleInterface::~SimpleInterface()
+{
+}
+
+InterfaceTester::InterfaceTester() : interface(0)
+{
+}
+
+InterfaceTester::~InterfaceTester()
+{
+}
+
+int InterfaceTester::capacity()
+{
+    return interface->capacity();
+}
+
+int InterfaceTester::size()
+{
+    return interface->size();
+}
+
+void* InterfaceTester::get(int n)
+{
+    return interface->get(n);
+}
+
+void InterfaceTester::setInterface(SimpleInterface* i)
+{
+    interface = i;
+}

tests/CSharp/CSharp.h

@@ -1262,3 +1262,28 @@ struct DLL_API CSharp
 };
 
 static int FOOBAR_CONSTANT = 42;
+
+
+
+class DLL_API SimpleInterface
+{
+public:
+    SimpleInterface();
+    ~SimpleInterface();
+    virtual int size() const = 0;
+    virtual int capacity() const = 0;
+    virtual void* get(int n) = 0;
+};
+
+class DLL_API InterfaceTester
+{
+public:
+    InterfaceTester();
+    ~InterfaceTester();
+    int capacity();
+    int size();
+    void* get(int n);
+    void setInterface(SimpleInterface* i);
+private:
+    SimpleInterface* interface;
+};