fm-rds-tx/internal/dryrun/dryrun_test.go

package dryrun

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

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

func TestGenerate(t *testing.T) {
	cfg := cfgpkg.Default()
	frame := Generate(cfg)
	if frame.Mode != "dry-run" { t.Fatalf("unexpected mode: %s", frame.Mode) }
	if len(frame.PreviewSamples) != 16 { t.Fatalf("unexpected preview length: %d", len(frame.PreviewSamples)) }
	if frame.Source != "tones" { t.Fatalf("unexpected source: %s", frame.Source) }
	if frame.PreEmphasisTauUS != 50 { t.Fatalf("unexpected preEmphasisTauUS: %.0f", frame.PreEmphasisTauUS) }
	if !frame.FMModulation { t.Fatal("expected fmModulationEnabled=true") }
	if frame.DeviceRate != float64(cfg.FM.CompositeRateHz) { t.Fatalf("expected deviceRate=%d, got %.0f", cfg.FM.CompositeRateHz, frame.DeviceRate) }
}

func TestWriteJSONFile(t *testing.T) {
	dir := t.TempDir()
	out := filepath.Join(dir, "frame.json")
	if err := WriteJSON(out, Generate(cfgpkg.Default())); err != nil { t.Fatalf("WriteJSON: %v", err) }
	if _, err := os.Stat(out); err != nil { t.Fatalf("expected output: %v", err) }
}