Test files for cpp classes.

tests/run/cpp_classes.pyx

+cdef extern from "shapes.h" namespace shapes:
+
+    cdef cppclass Shape:
+        area()
+    
+    cdef cppclass Rectangle(Shape):
+        int width
+        int height
+        __init__(int, int)
+    
+    cdef cppclass Square(Shape):
+        int side
+        __init__(int)
+
+cdef Rectangle *rect = new Rectangle(10, 20)
+cdef Square *sqr = new Square(15)
+
+del rect, sqr

tests/run/shapes.cpp

+#include "shapes.h"
+
+using namespace shapes;
+
+Rectangle::Rectangle(int width, int height)
+{
+    this->width = width;
+    this->height = height;
+}
+
+Square::Square(int side)
+{
+    this->side = side;
+}
+

tests/run/shapes.h

+#ifndef SHAPES_H
+#define SHAPES_H
+
+namespace shapes {
+
+    class Shape
+    {
+    public:
+        virtual float area() = 0;
+        virtual ~Shape() { }
+    };
+    
+    class Rectangle : public Shape
+    {
+    public:
+        Rectangle(int width, int height);
+        float area() { return width * height; }
+        int width;
+        int height;
+    };
+    
+    class Square : public Shape
+    {
+    public:
+        Square(int side);
+        float area() { return side * side; }
+        int side;
+    };
+
+}
+#endif