package mic

import (
	"bytes"
	"testing"
)

func TestAppendChunkPCMCaps(t *testing.T) {
	t.Parallel()
	half := maxChunkPCM / 2
	buf := appendChunkPCM(nil, bytes.Repeat([]byte{1}, half))
	buf = appendChunkPCM(buf, bytes.Repeat([]byte{2}, half))
	buf = appendChunkPCM(buf, bytes.Repeat([]byte{3}, half))
	if len(buf) != maxChunkPCM {
		t.Fatalf("len = %d, want %d", len(buf), maxChunkPCM)
	}
	if buf[0] != 2 {
		t.Fatalf("first byte = %d, want 2 (oldest chunk dropped)", buf[0])
	}
}