test(rlp): list-helper functions

Author: ARR4N

rlp/list.libevm_test.go

@@ -0,0 +1,56 @@
+// Copyright 2025 the libevm authors.
+//
+// The libevm additions to go-ethereum are free software: you can redistribute
+// them and/or modify them under the terms of the GNU Lesser General Public License
+// as published by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// The libevm additions are distributed in the hope that they will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+// General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+package rlp
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestEncodeListToBuffer(t *testing.T) {
+	vals := []uint{1, 2, 3, 4, 5}
+
+	want, err := EncodeToBytes(vals)
+	require.NoErrorf(t, err, "EncodeToBytes(%T{%[1]v})", vals)
+
+	var got bytes.Buffer
+	buf := NewEncoderBuffer(&got)
+	err = EncodeListToBuffer(buf, vals)
+	require.NoErrorf(t, err, "EncodeListToBuffer(..., %T{%[1]v})", vals)
+	require.NoErrorf(t, buf.Flush(), "%T.Flush()", buf)
+
+	assert.Equal(t, want, got.Bytes(), "EncodeListToBuffer(..., %T{%[1]v})", vals)
+}
+
+func TestDecodeList(t *testing.T) {
+	vals := []uint{0, 1, 42, 314159}
+
+	rlp, err := EncodeToBytes(vals)
+	require.NoErrorf(t, err, "EncodeToBytes(%T{%[1]v})", vals)
+
+	s := NewStream(bytes.NewReader(rlp), 0)
+	got, err := DecodeList[uint](s)
+	require.NoErrorf(t, err, "DecodeList[%T]()", vals[0])
+
+	require.Equal(t, len(vals), len(got), "number of values returned by DecodeList()")
+	for i, gotPtr := range got {
+		assert.Equalf(t, vals[i], *gotPtr, "DecodeList()[%d]", i)
+	}
+}