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-rw-r--r--tests/stdlib/tsetutils.nim13
1 files changed, 13 insertions, 0 deletions
diff --git a/tests/stdlib/tsetutils.nim b/tests/stdlib/tsetutils.nim
index d5093bf11..c8498f23e 100644
--- a/tests/stdlib/tsetutils.nim
+++ b/tests/stdlib/tsetutils.nim
@@ -1,8 +1,10 @@
 discard """
+  matrix: "--mm:refc; --mm:orc"
   targets: "c js"
 """
 
 import std/setutils
+import std/assertions
 
 type 
   Colors = enum
@@ -32,5 +34,16 @@ template main =
     doAssert {range[0..10](0), 1, 2, 3}.complement == {range[0..10](4), 5, 6, 7, 8, 9, 10}
     doAssert {'0'..'9'}.complement == {0.char..255.char} - {'0'..'9'}
 
+  block: # `[]=`
+    type A = enum
+      a0, a1, a2, a3
+    var s = {a0, a3}
+    s[a0] = false
+    s[a1] = false
+    doAssert s == {a3}
+    s[a2] = true
+    s[a3] = true
+    doAssert s == {a2, a3}
+
 main()
 static: main()