From 4f8c9f8828abb1f86af5ac40063a6f6252403298 Mon Sep 17 00:00:00 2001
From: Kaushik Kulkarni <kaushikcfd@gmail.com>
Date: Thu, 10 Mar 2022 16:09:01 -0600
Subject: [PATCH] tests whether obj tagged can be persistent hashed

---
 test/test_loopy.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/test_loopy.py b/test/test_loopy.py
index 10171ef6e..c0eeea3b1 100644
--- a/test/test_loopy.py
+++ b/test/test_loopy.py
@@ -3263,6 +3263,20 @@ def test_redn_in_predicate(ctx_factory):
     lp.auto_test_vs_ref(knl, ctx, knl)
 
 
+def test_obj_tagged_is_persistent_hashable():
+    from loopy.tools import LoopyKeyBuilder
+    from pytools.tag import tag_dataclass, Tag
+    from loopy.match import ObjTagged
+
+    lkb = LoopyKeyBuilder()
+
+    @tag_dataclass
+    class MyTag(Tag):
+        pass
+
+    assert lkb(ObjTagged(MyTag())) == lkb(ObjTagged(MyTag()))
+
+
 if __name__ == "__main__":
     if len(sys.argv) > 1:
         exec(sys.argv[1])
-- 
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