Extend cpdef method test to cover some more (non-)override cases.

tests/run/cpdef_method_override.pyx

@@ -31,12 +31,35 @@ cdef class BaseType:
     BaseType.meth
     BaseType.meth
     """
-    def callmeth(self):
+    cpdef callmeth(self):
+        return self.callmeth2()
+    cpdef callmeth2(self):
+        # not overridden by subclasses
         return self.meth()
     cpdef meth(self):
+        # overridden by subclasses
         print("BaseType.meth")
 
 
+class NonOverride(BaseType):
+    """
+    >>> NonOverride().callmeth()
+    BaseType.meth
+    >>> obj = NonOverride()
+    >>> obj.callmeth()
+    BaseType.meth
+    >>> obj.callmeth()
+    BaseType.meth
+    >>> _call_method(NonOverride)
+    BaseType.meth
+    BaseType.meth
+    BaseType.meth
+    BaseType.meth
+    BaseType.meth
+    BaseType.meth
+    """
+
+
 class PyClass(BaseType):
     """
     >>> PyClass().callmeth()
@@ -83,3 +106,34 @@ class PySlotsClass(BaseType):
 
     def meth(self):
         print("PySlotsClass.meth")
+
+
+class DynamicOverride(BaseType):
+    """
+    >>> DynamicOverride().callmeth()
+    meth1
+    >>> obj = DynamicOverride()
+    >>> obj.callmeth()
+    meth1
+    >>> obj.callmeth()
+    meth2
+    >>> obj.callmeth()
+    BaseType.meth
+    >>> obj.callmeth()
+    BaseType.meth
+    >>> _call_method(DynamicOverride)
+    meth1
+    meth1
+    meth2
+    meth1
+    meth2
+    BaseType.meth
+    """
+    def __init__(self):
+        self.meth = self.meth1
+    def meth1(self):
+        self.meth = self.meth2
+        print("meth1")
+    def meth2(self):
+        del self.meth
+        print("meth2")