From bdfdabc970ef286de9390ff0ab7740ff1145d388 Mon Sep 17 00:00:00 2001
From: Oskar Haarklou Veileborg <ohv1020@hotmail.com>
Date: Thu, 12 Jan 2023 10:59:36 +0100
Subject: list: fix Append & Prepend, remove varargs support

Similar reason for the API change as the previous commit.
---
 immutable_test.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'immutable_test.go')

diff --git a/immutable_test.go b/immutable_test.go
index a878a78..9a0de37 100644
--- a/immutable_test.go
+++ b/immutable_test.go
@@ -223,6 +223,19 @@ func TestList(t *testing.T) {
 		}
 	})
 
+	t.Run("AppendImmutable", func(t *testing.T) {
+		outer_l := NewList[int]()
+		for N := 0; N < 1_000; N++ {
+			l1 := outer_l.Append(0)
+			outer_l.Append(1)
+			if actual := l1.Get(N); actual != 0 {
+				t.Fatalf("Append mutates list with %d elements. Got %d instead of 0", N, actual)
+			}
+
+			outer_l = outer_l.Append(0)
+		}
+	})
+
 	RunRandom(t, "Random", func(t *testing.T, rand *rand.Rand) {
 		l := NewTList()
 		for i := 0; i < 100000; i++ {
-- 
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