musicube/test/test_bot.py

import asyncio
from unittest.mock import Mock, AsyncMock, patch

import pytest
from discord.ext import commands


@pytest.mark.asyncio
async def test_bot_ensure_voice(mbot, ctx):
  # Connects to voice channel of author if possible
  ctx.voice_client = None
  ctx.author.voice = AsyncMock()
  await mbot.ensure_voice(ctx)
  assert ctx.author.voice.channel.connect.call_count == 1
  ctx.reset_mock(return_value=True)

  # Error if author not inside a channel
  ctx.voice_client = None
  ctx.author.voice = None
  with pytest.raises(commands.CommandError):
    await mbot.ensure_voice(ctx)


@pytest.mark.asyncio
async def test_bot_play(mbot, ctx):
  with patch.object(mbot, '_ytdl') as ytdl:
    with patch('discord.FFmpegPCMAudio') as ffmpeg_pcm_audio:
      ctx.voice_client.is_playing.return_value = False
      url = "https://www.youtube.com/watch?v=Wr9LZ1hAFpQ"
      title = "In Flames - Deliver Us (Official Video)"
      ytdl.extract_info.return_value = {
          "entries": [
              {
                  "url": url,
                  "title": title
              }
          ]
      }
      audio = Mock()
      ffmpeg_pcm_audio.return_value = audio
      query = 'in flames deliver us'
      # pylint: disable=too-many-function-args
      await mbot.play(mbot, ctx, query=query)
      await asyncio.sleep(0)
      assert ytdl.extract_info.call_args.args == (query,)
      assert ytdl.extract_info.call_args.kwargs == {"download": False}
      assert ffmpeg_pcm_audio.call_args.args == (url,)
      assert ctx.voice_client.play.call_args.args == (audio,)
      assert ctx.send.call_count == 1