test for ticket #608

tests/run/builtin_type_inheritance_T608.pyx

+
+cdef class MyInt(int):
+    """
+    >>> MyInt(2) == 2
+    True
+    >>> MyInt(2).attr is None
+    True
+    """
+    cdef readonly object attr
+
+cdef class MyFloat(float):
+    """
+    >>> MyFloat(1.0)== 1.0
+    True
+    >>> MyFloat(1.0).attr is None
+    True
+    """
+    cdef readonly object attr
+
+ustring = u'abc'
+
+cdef class MyUnicode(unicode):
+    """
+    >>> MyUnicode(ustring) == ustring
+    True
+    >>> MyUnicode(ustring).attr is None
+    True
+    """
+    cdef readonly object attr
+
+cdef class MyList(list):
+    """
+    >>> MyList([1,2,3]) == [1,2,3]
+    True
+    >>> MyList([1,2,3]).attr is None
+    True
+    """
+    cdef readonly object attr
+
+cdef class MyDict(dict):
+    """
+    >>> MyDict({1:2, 3:4}) == {1:2, 3:4}
+    True
+    >>> MyDict({1:2, 3:4}).attr is None
+    True
+    """
+    cdef readonly object attr