Static method tests.

tests/run/static_methods.pyx

+cdef class A:
+    @staticmethod
+    def static_def(int x):
+        """
+        >>> A.static_def(2)
+        ('def', 2)
+        >>> A().static_def(2)
+        ('def', 2)
+        """
+        return 'def', x
+
+    @staticmethod
+    cdef static_cdef(int* x):
+        return 'cdef', x[0]
+
+#     @staticmethod
+#     cpdef static_cpdef(int x):
+#         """
+#         >>> A.static_def
+#         >>> A.static_cpdef
+#
+#         >>> A().static_def
+#         >>> A().static_cpdef
+#
+#         >>> A.static_cpdef(2)
+#         ('cpdef', 2)
+#         >>> A().static_cpdef(2)
+#         ('cpdef', 2)
+#         """
+#         return 'cpdef', x
+
+def call_static_def(int x):
+    """
+    >>> call_static_def(2)
+    ('def', 2)
+    """
+    return A.static_def(x)
+
+def call_static_cdef(int x):
+    """
+    >>> call_static_cdef(2)
+    ('cdef', 2)
+    """
+    cdef int *x_ptr = &x
+    return A.static_cdef(x_ptr)
+
+# def call_static_cpdef(int x):
+#     """
+#     >>> call_static_cpdef(2)
+#     ('cpdef', 2)
+#     """
+#     return A.static_cpdef(x)