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.PreEmphasisUS != 50 {
		t.Fatalf("unexpected preEmphasisUS: %.0f", frame.PreEmphasisUS)
	}
	if !frame.FMModulation {
		t.Fatal("expected fmModulationEnabled=true")
	}
}

func TestGenerateUsesInputPathAsSource(t *testing.T) {
	cfg := cfgpkg.Default()
	cfg.Audio.InputPath = "demo.wav"
	frame := Generate(cfg)
	if frame.Source != "demo.wav" {
		t.Fatalf("unexpected source: %s", frame.Source)
	}
}

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 failed: %v", err)
	}
	if _, err := os.Stat(out); err != nil {
		t.Fatalf("expected output file: %v", err)
	}
}