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import throttle from "./throttle.ts";import { assert, assertEquals } from "testing/asserts.ts";
const expectTimes = (times: number[], ...expected: number[]) => {  assertEquals(times.length, expected.length);  const margin = 32;  for (let i = 0; i < times.length; i++) {    assert(times[i] > expected[i] - margin);    assert(times[i] < expected[i] + margin);  }};
const runTest = (  interval: number,  {    leading = false,    trailing = false,  }: {    leading?: boolean;    trailing?: boolean;  },  ...expected: number[]) =>  new Promise<void>((done) => {    const t0 = performance.now();    const invocations: number[] = [];
    const fun = () => {      invocations.push(performance.now() - t0);    };
    const throttled = throttle(fun, 50, { leading, trailing });
    const iid = setInterval(throttled, interval);
    setTimeout(() => {      clearInterval(iid);      setTimeout(() => {        try {          expectTimes(invocations, ...expected);        } finally {          done();        }      }, 100);    }, 150);  });
Deno.test("throttle (leading + trailing)", () =>  runTest(10, { leading: true, trailing: true }, 10, 60, 110, 160));
Deno.test("throttle (trailing)", () =>  runTest(10, { leading: false, trailing: true }, 60, 110, 160));
Deno.test("throttle (leading)", () =>  runTest(16, { leading: true, trailing: false }, 16, 80, 144));