package logging

import (
	"bytes"
	"log/slog"
	"strings"
	"testing"
)

func TestNewLoggerWritesOutput(t *testing.T) {
	var buf bytes.Buffer
	logger := NewLogger(&buf, slog.LevelInfo)

	if logger == nil {
		t.Fatal("logger is nil")
	}

	logger.Info("hello", "component", "test")
	out := buf.String()
	if !strings.Contains(out, "hello") {
		t.Fatalf("output = %q, want to contain message", out)
	}
}

func TestNewLoggerNilWriter(t *testing.T) {
	logger := NewLogger(nil, slog.LevelInfo)
	if logger == nil {
		t.Fatal("logger is nil")
	}
	logger.Info("should not panic")
}