package logx

import (
	"bytes"
	"log/slog"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestValidateBeforeOpeningWriter(t *testing.T) {
	p := filepath.Join(t.TempDir(), "must-not-exist.log")
	for _, cfg := range []Config{{File: p, Format: "typo"}, {File: p, Level: "typo"}, {File: p, Output: "typo"}} {
		if cfg.Validate() == nil {
			t.Fatal("invalid configuration accepted")
		}
		if _, err := New(cfg); err == nil {
			t.Fatal("invalid logger created")
		}
		if _, err := os.Stat(p); !os.IsNotExist(err) {
			t.Fatal("validation touched filesystem", err)
		}
	}
}
func TestStandardLoggerUsesBorrowedInstance(t *testing.T) {
	var out bytes.Buffer
	l, _ := New(Config{Writer: &out})
	l.Standard(slog.LevelWarn).Print("driver diagnostic")
	if !strings.Contains(out.String(), `"level":"WARN"`) || !strings.Contains(out.String(), "driver diagnostic") {
		t.Fatal(out.String())
	}
}