# tests/test_app.py
"""
Tests for the Streamlit application UI.

Note: UI testing for Streamlit apps typically requires a dedicated library
like 'streamlit-testing-library'. These tests are placeholders to demonstrate
where UI tests would go and how they might be structured.
"""

import unittest


class TestStreamlitApp(unittest.TestCase):

    def test_app_imports(self):
        """
        A very basic test to ensure the app.py module can be imported
        without syntax errors or immediate import errors.
        """
        try:
            from src.book_recommender.apps.main_app import main

            self.assertTrue(callable(main))
        except ImportError as e:
            self.fail(f"Failed to import the Streamlit app: {e}")

    def test_header_renders(self):
        """
        Placeholder for a test that would check if the header renders.
        Using a real testing library, you would:
        1. Render the app.
        2. Query for the 'h1' element.
        3. Assert that its text content is correct.
        """
        self.assertTrue(True)

    def test_recommendation_button_works(self):
        """
        Placeholder for a test that would simulate a button click.
        Using a real testing library, you would:
        1. Render the app.
        2. Enter text into the text input.
        3. Simulate a click on the 'Recommend' button.
        4. Assert that the recommendation output appears.
        """
        self.assertTrue(True)


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