import unittest
import inspect

from main import Frame  # Assuming that Frame is defined in main.py
from main import nested_exception, simple_exception  # Assuming these functions are also defined in main.py

class TestFrame(unittest.TestCase):

    def test_frame(self):
        try:
            simple_exception()
        except ValueError as e:
            self.assertIsNotNone(e.__traceback__)
            frame_info = inspect.getinnerframes(e.__traceback__)[0]
            frame = Frame(frame_info)
            same_frame = Frame(frame_info)
            self.assertEqual(frame_info.frame, frame.frame)

        self.assertEqual(frame.lineno, 12)
        self.assertEqual(frame.filename, __file__)
        self.assertEqual(frame.function, "test_frame")
        self.assertEqual(frame.line, "        simple_exception()\n")

        with open(__file__) as f:
            self.assertEqual(f.read(), frame.file_content)

        self.assertEqual(repr(frame), f"<Frame {__file__}, test_frame, 12>")

        try:
            nested_exception()
        except Exception as e:
            self.assertIsNotNone(e.__traceback__)
            frame_info = inspect.getinnerframes(e.__traceback__)[0]
            other_frame = Frame(frame_info)

        self.assertEqual(same_frame, frame)
        self.assertNotEqual(other_frame, frame)
        self.assertEqual(hash(same_frame), hash(frame))
        self.assertNotEqual(hash(other_frame), hash(frame))

    def test_frame_with_no_context_should_return_empty_line(self):
        frame = Frame(
            inspect.FrameInfo(None, "filename.py", 123, "function", None, 3)  # type: ignore
        )

        self.assertEqual(frame.line, "")

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