test_bot.py

from discord import Message
from unittest import TestCase
from unittest.mock import AsyncMock

# Your other imports...

class TestBotCommands(TestCase):
    # Your other test methods...

    async def test_generate_valid_model(self):
        ctx = await self.bot.get_context(Message(content='!generate model1 test prompt', channel=AsyncMock()))
        await self.bot.invoke(ctx)

        # Example assertion: Check if the bot sends a message with an attachment
        self.assertTrue(ctx.send.called)
        self.assertIsInstance(ctx.send.call_args[1]['file'], discord.File)

    async def test_generate_invalid_model(self):
        ctx = await self.bot.get_context(Message(content='!generate invalid_model test prompt', channel=AsyncMock()))
        await self.bot.invoke(ctx)

        # Example assertion: Check if the bot sends a message about an invalid model
        self.assertTrue(ctx.send.called)
        self.assertIn("Invalid model name", ctx.send.call_args[0][0])

    async def test_generate_no_permissions(self):
        ctx = await self.bot.get_context(Message(content='!generate model1 test prompt', channel=AsyncMock()))
        ctx.author.permissions_for.return_value.send_messages = False
        await self.bot.invoke(ctx)

        # Example assertion: Check if the bot sends a message about lack of permissions
        self.assertTrue(ctx.send.called)
        self.assertIn("You do not have permission to send messages", ctx.send.call_args[0][0])

    async def test_generate_image_exception(self):
        ctx = await self.bot.get_context(Message(content='!generate model1 test prompt', channel=AsyncMock()))
        await self.bot.invoke(ctx)

        # Example assertion: Check if the bot sends a message about an error
        self.assertTrue(ctx.send.called)
        self.assertIn("An error occurred while generating the image", ctx.send.call_args[0][0])