import {
  extractMonthFromExcelFilename,
  formatMonthRange,
  isSalaryMonth,
} from "../src/utils/payrollMonth";

const detected = extractMonthFromExcelFilename("宁波兆安流体科技有限公司_月度汇总_20260501-20260531.xlsx");
assertEqual(detected?.month || "", "2026-05");
assertEqual(detected?.rangeLabel || "", "2026/05/01 至 2026/05/31");

const dashed = extractMonthFromExcelFilename("考勤汇总_2026-06.xlsx");
assertEqual(dashed?.month || "", "2026-06");

assertEqual(formatMonthRange("2026-05"), "2026/05/01 至 2026/05/31");
assertEqual(formatMonthRange(""), "请选择核算月份");
assertEqual(String(isSalaryMonth("2026-05")), "true");
assertEqual(String(isSalaryMonth("")), "false");
assertEqual(String(isSalaryMonth("2026-13")), "false");

function assertEqual(actual: string, expected: string): void {
  if (actual !== expected) {
    throw new Error(`期望 ${expected}，实际 ${actual}`);
  }
}