import { describe, expect, it } from "vitest";

import { t } from "../ui/src/i18n/index.ts";

import { formatNextRun } from "../ui/src/ui/presenter.ts";

describe("formatNextRun", () => {

it("returns n/a for nullish values", () => {

expect(formatNextRun(null)).toBe("n/a");

expect(formatNextRun(undefined)).toBe("n/a");

it("returns localized n/a for nullish values", () => {

expect(formatNextRun(null)).toBe(t("common.na"));

expect(formatNextRun(undefined)).toBe(t("common.na"));

});

it("includes weekday and relative time", () => {

const ts = Date.UTC(2026, 1, 23, 15, 0, 0);

const out = formatNextRun(ts);

expect(out).toMatch(/^[A-Za-z]{3}, /);

const weekday = new Date(ts).toLocaleDateString(undefined, { weekday: "short" });

expect(out.slice(0, weekday.length + 2)).toBe(`${weekday}, `);

expect(out).toContain("(");

expect(out).toContain(")");

});