1 files changed, 19 insertions, 0 deletions
diff --git a/tests/stdlib/tpermutations.nim b/tests/stdlib/tpermutations.nim
new file mode 100644
index 000000000..a6e07ded6
--- /dev/null
+++ b/tests/stdlib/tpermutations.nim
@@ -0,0 +1,19 @@
+discard """
+  output: '''@[0, 2, 1]
+@[1, 0, 2]
+@[1, 2, 0]
+@[2, 0, 1]
+@[2, 1, 0]
+@[2, 0, 1]
+@[1, 2, 0]
+@[1, 0, 2]
+@[0, 2, 1]
+@[0, 1, 2]'''
+"""
+import algorithm
+
+var v = @[0, 1, 2]
+while v.nextPermutation():
+  echo v
+while v.prevPermutation():
+  echo v