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-rw-r--r--lib/tests/misc.nix9
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/tests/misc.nix b/lib/tests/misc.nix
index 0d30e93aafb..06cb5e763e2 100644
--- a/lib/tests/misc.nix
+++ b/lib/tests/misc.nix
@@ -726,6 +726,15 @@ runTests {
     expected = 7;
   };
 
+  testAllUnique_true = {
+    expr = allUnique [ 3 2 4 1 ];
+    expected = true;
+  };
+  testAllUnique_false = {
+    expr = allUnique [ 3 2 3 4 ];
+    expected = false;
+  };
+
 # ATTRSETS
 
   testConcatMapAttrs = {