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-rw-r--r--tests/010/tree.tl5
1 files changed, 5 insertions, 0 deletions
diff --git a/tests/010/tree.tl b/tests/010/tree.tl
index 86a21167..c2fe5382 100644
--- a/tests/010/tree.tl
+++ b/tests/010/tree.tl
@@ -127,3 +127,8 @@
tr #T((identity < =) 1 2 3)
(copy-search-tree tr) #T((identity < =) 1 2 3)
(make-similar-tree tr) #T((identity < =))))
+
+(mtest
+ (uni #T(() "a" "b") #T(() "b" "c")) ("a" "b" "c")
+ (diff #T(() "a" "b") #T(() "b" "c")) ("a")
+ (isec #T(() "a" "b") #T(() "b" "c")) ("b"))