From 87cb21523d06766cade90d888238ec0332825074 Mon Sep 17 00:00:00 2001
From: jand <none@none>
Date: Wed, 27 Aug 2003 20:01:21 +0000
Subject: [PATCH] refined test to find previously undetected bug

---
 myhdl/test_Signal.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/myhdl/test_Signal.py b/myhdl/test_Signal.py
index 7c2f0900..6fb31766 100644
--- a/myhdl/test_Signal.py
+++ b/myhdl/test_Signal.py
@@ -30,6 +30,7 @@ random.seed(1) # random, but deterministic
 import sys
 maxint = sys.maxint
 import types
+import copy
 
 import unittest
 from unittest import TestCase
@@ -111,7 +112,10 @@ class SigTest(TestCase):
     def testUpdate(self):
         """ _update() should assign next into val """
         for s, n in zip(self.sigs, self.nexts):
+            cur = copy.copy(s.val)
             s.next = n
+            # assigning to next should not change current value ...
+            self.assert_(s.val == cur)
             s._update()
             self.assert_(s.val == n)