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))
    }
}

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)
    }
}