import test from "node:test";
import assert from "node:assert/strict";
import { queueSteps, benchmarks } from "./model.js";

test("faster processing leaves no waiting queue", () => {
  const steps = queueSteps(160, 80);
  assert.equal(steps[0].arrival, 160);
  assert.equal(steps[0].end, 240);
  assert.ok(steps.every((step) => step.wait === 0));
});
test("equal processing and media intervals leave zero ideal headroom", () => {
  assert.ok(queueSteps(160, 160).every((step) => step.wait === 0));
});
test("overload adds sixty milliseconds per subsequent input block", () => {
  const steps = queueSteps(160, 220);
  assert.equal(steps[0].wait, 0);
  assert.equal(steps[7].wait, 420);
  assert.equal(steps[7].end, 1920);
});
test("invalid media times fail explicitly", () => {
  assert.throws(() => queueSteps(0, 80), RangeError);
  assert.throws(() => queueSteps(160, Number.NaN), RangeError);
});
test("benchmark ordering and source values are preserved", () => {
  assert.deepEqual(
    benchmarks.map((model) => model.answer),
    [10.12, 8.4, 6.89, 4.25],
  );
  assert.ok(benchmarks.every((model) => model.first <= model.answer));
});