t/t-algorithms.py: Add a simple test for `Keccak1600.copy'.

diff --git a/t/t-algorithms.py b/t/t-algorithms.py
index fc6bff2..2fd0e09 100644 (file)
--- a/t/t-algorithms.py
+++ b/t/t-algorithms.py
@@ -742,6 +742,13 @@ class TestKeccak (HashBufferTestMixin):
     st1.mix(m0).step()
     me.assertNotEqual(st0.extract(32), st1.extract(32))
 
+    ## Check state copying.
+    st1 = st0.copy()
+    mask = st1.extract(len(m1))
+    st0.mix(m1)
+    st1.mix(m1)
+    me.assertEqual(st0.extract(32), st1.extract(32))
+
     ## Check error conditions.
     _ = st0.extract(200)
     me.assertRaises(ValueError, st0.extract, 201)