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import base64
import unittest

from core.trae_bot import TraeBot


class DummyPage:
    def __init__(self):
        self.url = "https://example.com/x"

    def content(self):
        return "<html><body>hi</body></html>"

    def screenshot(self, full_page=True, type="png"):
        return b"\x89PNG\r\n\x1a\nfake"


class DummyPageNoScreenshot(DummyPage):
    def screenshot(self, full_page=True, type="png"):
        raise RuntimeError("no screenshot")


class TestDebugCapture(unittest.TestCase):
    def test_capture_sets_fields(self):
        bot = TraeBot("sid")
        try:
            raise ValueError("boom")
        except Exception as e:
            bot._capture_debug(DummyPage(), e)
        self.assertIn("ValueError", bot.last_error)
        self.assertIsInstance(bot.last_traceback, str)
        self.assertEqual(bot.last_url, "https://example.com/x")
        self.assertIn("hi", bot.last_html)
        png = base64.b64decode(bot.last_screenshot_png_b64.encode("ascii"))
        self.assertTrue(png.startswith(b"\x89PNG"))

    def test_capture_survives_screenshot_failure(self):
        bot = TraeBot("sid")
        try:
            raise RuntimeError("boom")
        except Exception as e:
            bot._capture_debug(DummyPageNoScreenshot(), e)
        self.assertIn("RuntimeError", bot.last_error)
        self.assertIsNone(bot.last_screenshot_png_b64)