package offline

import (
    "os"
    "path/filepath"
    "testing"
    "time"

    cfgpkg "github.com/jan/fm-rds-tx/internal/config"
)

func TestGenerateFrame(t *testing.T) {
    g := NewGenerator(cfgpkg.Default())
    frame := g.GenerateFrame(50 * time.Millisecond)
    if frame == nil {
        t.Fatal("expected frame")
    }
    if len(frame.Samples) == 0 {
        t.Fatal("expected samples")
    }
}

func TestWriteFile(t *testing.T) {
    cfg := cfgpkg.Default()
    out := filepath.Join(t.TempDir(), "test.iqf32")
    cfg.Backend.OutputPath = out
    g := NewGenerator(cfg)
    if err := g.WriteFile(out, 20*time.Millisecond); err != nil {
        t.Fatalf("WriteFile failed: %v", err)
    }
    info, err := os.Stat(out)
    if err != nil {
        t.Fatalf("expected output file: %v", err)
    }
    if info.Size() == 0 {
        t.Fatal("expected non-empty file")
    }
}