//go:build export_samples

package caption_test

import (
	"image"
	"image/png"
	"os"
	"path"
	"strings"
	"testing"
)

func init() {
	beforeCheck = append(beforeCheck, func(t *testing.T, name string, redraw bool, got image.Image) {
		suffix := ""
		if redraw {
			suffix = " redraw"
		}
		t.Run("export"+suffix, func(t *testing.T) {
			outPath := strings.TrimSpace(os.Getenv("TEST_RENDER_OUT_PATH"))
			if len(outPath) == 0 {
				outPath = os.TempDir()
			}
			outPath = path.Join(outPath, "overlay-"+strings.Join(strings.Fields(name+suffix), "-")+".png")
			if re, err := os.Create(outPath); err != nil {
				t.Fatalf("cannot create: %v", err)
			} else if err = (&png.Encoder{CompressionLevel: png.NoCompression}).Encode(re, got); err != nil {
				t.Fatalf("cannot encode to file: %v", err)
			}
			t.Logf("test case exported to %s", outPath)
		})
	})
}