From ce18be44cb35bc89ba0920623410f06219d49ef0 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Thu, 18 Jul 2013 16:52:20 -0400
Subject: [PATCH] Test sliced reduction

---
 test/test_algorithm.py | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/test/test_algorithm.py b/test/test_algorithm.py
index fc31e8c5..59fa60f0 100644
--- a/test/test_algorithm.py
+++ b/test/test_algorithm.py
@@ -245,10 +245,16 @@ def test_sum(ctx_factory):
 
         a = a_gpu.get()
 
-        sum_a = np.sum(a)
-        sum_a_gpu = cl_array.sum(a_gpu).get()
-
-        assert abs(sum_a_gpu - sum_a) / abs(sum_a) < 1e-4
+        for slc in [
+                slice(None),
+                slice(1000, 3000),
+                slice(1000, -3000),
+                slice(1000, None),
+                ]:
+            sum_a = np.sum(a[slc])
+            sum_a_gpu = cl_array.sum(a_gpu[slc]).get()
+
+            assert abs(sum_a_gpu - sum_a) / abs(sum_a) < 1e-4
 
 
 @pytools.test.mark_test.opencl
-- 
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