const test = require("node:test");
const assert = require("node:assert/strict");
const formatDuration = require("../lib/format-duration");

test("formats Cookbook ISO 8601 durations for people", () => {
  assert.equal(formatDuration("PT0H10M0S"), "10 min");
  assert.equal(formatDuration("PT1H30M0S"), "1 hr 30 min");
  assert.equal(formatDuration("P2DT1H"), "2 days 1 hr");
  assert.equal(formatDuration("PT0S"), "0 min");
});

test("preserves duration values it does not recognize", () => {
  assert.equal(formatDuration("about an hour"), "about an hour");
  assert.equal(formatDuration(null), null);
});