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import { describe, test } from "node:test";
import assert from "node:assert/strict";
import { Stopwatch, timePromise } from "./Stopwatch";
describe("Stopwatch", () => {
test("should be able to be initialised", () => {
const sw = new Stopwatch();
assert.equal(sw != null, true);
});
test("should measure elapsed time", async () => {
const sw = Stopwatch.startNew();
await new Promise((resolve) => void setTimeout(resolve, 101));
sw.stop();
const elapsed = sw.elapsed();
assert(elapsed.totalMilliseconds >= 100, `Elapsed time was ${elapsed.totalMilliseconds} ms`);
});
test("should reset correctly", async () => {
const sw = Stopwatch.startNew();
await new Promise((resolve) => void setTimeout(resolve, 101));
sw.stop();
let elapsed = sw.elapsed();
assert(elapsed.totalMilliseconds >= 100, `Elapsed time was ${elapsed.totalMilliseconds} ms`);
sw.reset();
await new Promise((resolve) => void setTimeout(resolve, 50));
sw.stop();
elapsed = sw.elapsed();
assert(elapsed.totalMilliseconds >= 49 && elapsed.totalMilliseconds < 100, `Elapsed time after reset was ${elapsed.totalMilliseconds} ms`);
});
test("getElapsedAndReset should work correctly", async () => {
const sw = Stopwatch.startNew();
await new Promise((resolve) => void setTimeout(resolve, 101));
sw.stop();
let elapsed = sw.getElapsedAndReset();
assert(elapsed.totalMilliseconds >= 100, `Elapsed time was ${elapsed.totalMilliseconds} ms`);
await new Promise((resolve) => void setTimeout(resolve, 50));
sw.stop();
elapsed = sw.elapsed();
assert(elapsed.totalMilliseconds >= 50 && elapsed.totalMilliseconds < 100, `Elapsed time after getElapsedAndReset was ${elapsed.totalMilliseconds} ms`);
});
test("timePromise should measure promise execution time", async () => {
const { result, elapsed } = await timePromise(async () => {
await new Promise((resolve) => void setTimeout(resolve, 101));
return 42;
});
assert.equal(result, 42);
assert(elapsed.totalMilliseconds >= 100, `Elapsed time was ${elapsed.totalMilliseconds} ms`);
});
});
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