import unittest
from src.index import DuckDuckGoSearchTool


class TestSearchTool(unittest.TestCase):
    def setUp(self):
        self.tool = DuckDuckGoSearchTool()

    def test_run_returns_string(self):
        result = self.tool.run("Python programming language")
        self.assertIsInstance(result, str)
        self.assertTrue(len(result) > 0)

    def test_run_handles_empty_query(self):
        result = self.tool.run("")
        self.assertIsInstance(result, str)
        self.assertTrue(len(result) > 0)


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