// format_test.dart — L1 数值格式化纯函数单测(支柱 3:纯逻辑、确定性、零依赖)。
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/util/format.dart';

void main() {
  group('formatSpeed(字节/秒 → 数值+单位)', () {
    test('null → —/KB/s(未取到)', () {
      expect(formatSpeed(null), ('—', 'KB/s'));
    });

    test('0 → 0 B/s', () {
      expect(formatSpeed(0), ('0', 'B/s'));
    });

    test('< 1KB 用 B/s 且取整', () {
      expect(formatSpeed(512), ('512', 'B/s'));
      expect(formatSpeed(1023), ('1023', 'B/s'));
    });

    test('KB/s 边界(1024)与一位小数', () {
      expect(formatSpeed(1024), ('1.0', 'KB/s'));
      expect(formatSpeed(1536), ('1.5', 'KB/s'));
    });

    test('MB/s 边界(1024^2)', () {
      expect(formatSpeed(1024 * 1024), ('1.0', 'MB/s'));
      expect(formatSpeed(1024 * 1024 * 5 + 512 * 1024), ('5.5', 'MB/s'));
    });

    test('GB/s 边界(1024^3)与两位小数', () {
      expect(formatSpeed(1024 * 1024 * 1024), ('1.00', 'GB/s'));
      expect(formatSpeed(2.5 * 1024 * 1024 * 1024), ('2.50', 'GB/s'));
    });
  });

  group('formatDuration(时长 → HH:MM:SS)', () {
    test('0 → 00:00:00', () {
      expect(formatDuration(Duration.zero), '00:00:00');
    });

    test('秒/分补零', () {
      expect(formatDuration(const Duration(seconds: 5)), '00:00:05');
      expect(formatDuration(const Duration(minutes: 3, seconds: 9)), '00:03:09');
    });

    test('小时不封顶(对齐连接计时 01:04:59)', () {
      expect(
        formatDuration(const Duration(hours: 1, minutes: 4, seconds: 59)),
        '01:04:59',
      );
      expect(formatDuration(const Duration(hours: 100)), '100:00:00');
    });

    test('分/秒取模 60(不溢出进位错乱)', () {
      expect(formatDuration(const Duration(minutes: 90)), '01:30:00');
    });
  });
}