import { describe, expect, it } from "vitest";
import {
  fmtDateRange,
  fmtShortDate,
  rangeDayCount,
} from "@/domain/work-orders/utils/wizard-date-utils";

describe("fmtShortDate", () => {
  it("formats ISO dates as Mon D", () => {
    expect(fmtShortDate("2026-06-08")).toBe("Jun 8");
  });

  it("returns em dash for invalid input", () => {
    expect(fmtShortDate("")).toBe("—");
    expect(fmtShortDate("nope")).toBe("—");
  });
});

describe("fmtDateRange", () => {
  it("joins start and end with en dash", () => {
    expect(fmtDateRange("2026-06-08", "2026-06-12")).toBe("Jun 8 – Jun 12");
  });
});

describe("rangeDayCount", () => {
  it("counts inclusive days order-independently", () => {
    expect(rangeDayCount("2026-06-08", "2026-06-12")).toBe(5);
    expect(rangeDayCount("2026-06-12", "2026-06-08")).toBe(5);
    expect(rangeDayCount("2026-06-08", "2026-06-08")).toBe(1);
  });
});