package main

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

func TestShouldRefreshFile(t *testing.T) {
	tmp := t.TempDir()
	path := filepath.Join(tmp, "radar.gif")

	if !shouldRefreshFile(path, time.Minute) {
		t.Fatalf("expected refresh when file missing")
	}

	if err := os.WriteFile(path, []byte("x"), 0o644); err != nil {
		t.Fatalf("write temp file: %v", err)
	}
	if shouldRefreshFile(path, time.Minute) {
		t.Fatalf("expected no refresh for fresh file")
	}

	old := time.Now().Add(-2 * time.Hour)
	if err := os.Chtimes(path, old, old); err != nil {
		t.Fatalf("chtimes: %v", err)
	}
	if !shouldRefreshFile(path, time.Minute) {
		t.Fatalf("expected refresh for stale file")
	}
}