Add test case for very simple director classes

Test both abstract and concrete base classes, with simple int/bool data.
This level of complexity is very helpful when setting up director
functionality for a new target language.

Examples/test-suite/common.mk

@@ -214,6 +214,7 @@ CPP_TEST_CASES += \
 	director_protected_overloaded \
 	director_redefined \
 	director_ref \
+	director_simple \
 	director_smartptr \
 	director_thread \
 	director_unroll \

Examples/test-suite/director_simple.i

@@ -0,0 +1,42 @@
+%module(directors="1") director_simple
+
+%feature("director") IntBase;
+%feature("director") BoolBase;
+
+%inline %{
+class IntBase {
+ public:
+  virtual ~IntBase() {}
+  IntBase(int i = 3) { (void)i; }
+  virtual int apply(int x) const { return x * 2; }
+};
+
+class IntDerived : public IntBase {
+ public:
+  virtual int apply(int x) const { return x * 3; }
+};
+
+int apply(const IntBase& b, int x)
+{
+  return b.apply(x);
+}
+
+class BoolBase {
+ public:
+  virtual ~BoolBase() {}
+  BoolBase() {}
+  virtual bool apply(bool a, bool b) const = 0;
+};
+
+class BoolDerived : public BoolBase {
+ public:
+  virtual bool apply(bool a, bool b) const { return a != b; }
+};
+
+bool apply(const BoolBase& base, bool a, bool b)
+{
+  return base.apply(a, b);
+}
+
+%}
+