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-rw-r--r--tests/010/tree.tl8
1 files changed, 8 insertions, 0 deletions
diff --git a/tests/010/tree.tl b/tests/010/tree.tl
index fde11300..6a1d4aa1 100644
--- a/tests/010/tree.tl
+++ b/tests/010/tree.tl
@@ -111,3 +111,11 @@
(tree-delete tr 17) 17
(tree-delete tr 18) 18
(tree-delete tr 19) 19)
+
+(set *tree-fun-whitelist* [list* '= '< *tree-fun-whitelist*])
+
+(let ((tr [tree '(1 2 3) identity < =]))
+ (mtest
+ tr #T((identity < =) 1 2 3)
+ (copy-search-tree tr) #T((identity < =) 1 2 3)
+ (make-similar-tree tr) #T((identity < =))))