package stdinpcm

import (
	"bytes"
	"context"
	"testing"
	"time"
)

func TestSourceReadsPCMChunks(t *testing.T) {
	// Two stereo frames (S16LE): [0,0] and [32767,-32768]
	raw := []byte{
		0x00, 0x00, 0x00, 0x00,
		0xff, 0x7f, 0x00, 0x80,
	}
	src := New("stdin-test", bytes.NewReader(raw), 44100, 2, 2)
	if err := src.Start(context.Background()); err != nil {
		t.Fatalf("start: %v", err)
	}
	defer src.Stop()

	select {
	case chunk := <-src.Chunks():
		if chunk.Channels != 2 {
			t.Fatalf("channels=%d", chunk.Channels)
		}
		if len(chunk.Samples) != 4 {
			t.Fatalf("samples=%d want 4", len(chunk.Samples))
		}
	case <-time.After(1 * time.Second):
		t.Fatal("timed out waiting for chunk")
	}
}