extend test

tests/run/ct_DEF.pyx

@@ -94,18 +94,21 @@ def l():
 
 def large_nums():
     """
-    >>> ul32, ul64, l64 = large_nums()
+    >>> ul32, ul64, l64, n64 = large_nums()
     >>> print_large_number(ul32)
     4294967295
     >>> print_large_number(ul64)
     18446744073709551615
     >>> print_large_number(l64)
     4294967295
+    >>> print_large_number(n64)
+    -4294967295
     """
     cdef unsigned long ul32 = LARGE_NUM32
     cdef unsigned long long ul64 = LARGE_NUM64
     cdef long long l64 = LARGE_NUM32
-    return ul32, ul64, l64
+    cdef long long n64 = -LARGE_NUM32
+    return ul32, ul64, l64, n64
 
 def f():
     """