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

import { computeSoundEmitterDistanceGain } from "../../src/runtime-three/runtime-audio-system";

describe("computeSoundEmitterDistanceGain", () => {
  it("keeps full volume near the emitter and eases smoothly to silence at max distance", () => {
    expect(computeSoundEmitterDistanceGain(4, 6, 24)).toBe(1);
    expect(computeSoundEmitterDistanceGain(6, 6, 24)).toBe(1);
    expect(computeSoundEmitterDistanceGain(12, 6, 24)).toBeCloseTo(0.198, 3);
    expect(computeSoundEmitterDistanceGain(18, 6, 24)).toBeCloseTo(0.012, 3);
    expect(computeSoundEmitterDistanceGain(24, 6, 24)).toBe(0);
    expect(computeSoundEmitterDistanceGain(30, 6, 24)).toBe(0);
  });
});