client/src/game/effects/__tests__/AudioManager.test.ts

import { describe, it, expect, vi, beforeEach } from 'vitest'
import { AudioManager } from '../AudioManager.ts'

const { HowlMock, HowlerMock, howlInstances } = vi.hoisted(() => {
  const howlInstances: any[] = []
  const HowlMock = vi.fn(function (this: any, options: any) {
    const instance = {
      options,
      play: vi.fn(() => 1),
      pause: vi.fn(),
      stop: vi.fn(),
      fade: vi.fn(),
      unload: vi.fn(),
    }
    howlInstances.push(instance)
    return instance
  } as any)
  const HowlerMock = {
    volume: vi.fn(),
  }
  return { HowlMock, HowlerMock, howlInstances }
})

vi.mock('howler', () => ({
  Howl: HowlMock,
  Howler: HowlerMock,
}))

vi.mock('../../../binAssets.ts', () => ({
  binAssetUrl: (path: string) => `https://assets.test/${path}`,
}))

beforeEach(() => {
  vi.clearAllMocks()
  howlInstances.length = 0
})

describe('AudioManager', () => {
  it('starts muted and lazy-loads soundtrack after unmute', () => {
    const audio = new AudioManager()

    expect(HowlerMock.volume).toHaveBeenLastCalledWith(0)
    expect(HowlMock).toHaveBeenCalledTimes(6)

    audio.startMusic()
    expect(HowlMock).toHaveBeenCalledTimes(6)

    audio.unmute()
    expect(HowlerMock.volume).toHaveBeenLastCalledWith(0.5)
    expect(HowlMock).toHaveBeenCalledTimes(7)
    expect(howlInstances[6].options.src[0]).toMatch(/music\/soundtrack\/bamboo_.*_32\.opus$/)
    expect(howlInstances[6].play).toHaveBeenCalled()
  })

  it('mutes, unmutes, and destroys soundtrack separately from sfx', () => {
    const audio = new AudioManager()

    audio.startMusic()
    audio.unmute()
    const music = howlInstances[6]

    audio.mute()
    expect(HowlerMock.volume).toHaveBeenLastCalledWith(0)
    expect(music.pause).toHaveBeenCalledWith(1)

    audio.unmute()
    expect(music.play).toHaveBeenCalledTimes(2)

    audio.destroy()
    expect(howlInstances.slice(0, 4).every((howl) => howl.unload.mock.calls.length === 1)).toBe(true)
    expect(music.unload).toHaveBeenCalled()
  })

  it('skips failed soundtrack tracks without throwing', () => {
    const audio = new AudioManager()

    audio.startMusic()
    audio.unmute()
    const firstMusic = howlInstances[6]

    expect(() => firstMusic.options.onloaderror()).not.toThrow()
    expect(firstMusic.unload).toHaveBeenCalled()
    expect(HowlMock).toHaveBeenCalledTimes(8)
    expect(howlInstances[7].play).toHaveBeenCalled()
  })
})