import unittest
import os
from PIL import Image
from unittest.mock import patch, Mock
from tests import check_url, load_image, get_caption

class TestWebLinksHandler(unittest.TestCase):

    def test_check_url_valid(self):
        valid_url = "https://www.example.com"
        self.assertTrue(check_url(valid_url))

    def test_check_url_invalid(self):
        invalid_url = "not_a_valid_url"
        self.assertFalse(check_url(invalid_url))

    @patch('requests.get')
    def test_load_image_from_url(self, mock_get):
        url = "https://www.example.com/image.jpg"
        response_mock = Mock()
        response_mock.raw = Mock()
        mock_get.return_value = response_mock

        image = load_image(url)
        self.assertIsInstance(image, Image.Image)

    def test_load_image_from_file(self):
        file_path = "path/to/local/image.jpg"
        # You may want to create a temporary image for testing purposes
        # and delete it after the test is run.
        open(file_path, 'w').close()
        image = load_image(file_path)
        self.assertIsInstance(image, Image.Image)

    @patch('tests.Image.open')
    def test_get_caption(self, mock_open):
        # Mocking Image processor, model, and tokenizer
        mock_image_processor = Mock()
        mock_model = Mock()
        mock_tokenizer = Mock()

        # Mocking Image object
        mock_image = Mock()
        mock_image_processor.return_value = {'image_key': mock_image}

        # Mocking the model.generate method
        mock_model.generate.return_value = torch.tensor([[1, 2, 3]])

        # Mocking tokenizer.batch_decode method
        mock_tokenizer.batch_decode.return_value = ['test caption']

        with patch('builtins.print') as mock_print:
            caption = get_caption(mock_model, mock_image_processor, mock_tokenizer, 'dummy_image_path')

        mock_open.assert_called_once()
        mock_model.generate.assert_called_once_with(**{'image_key': mock_image})
        mock_tokenizer.batch_decode.assert_called_once_with(torch.tensor([[1, 2, 3]]), skip_special_tokens=True)
        mock_print.assert_called_once_with('test caption')
        self.assertEqual(caption, 'test caption')

if __name__ == '__main__':
    unittest.main()