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"""
Since this file contains Python 3 specific syntax, it's named without a test_
prefix so the test runner won't try to import it. Instead, the test class is
imported in test_debug.py, but only on Python 3.
This filename is also in setup.cfg flake8 exclude since the Python 2 syntax
error (raise ... from ...) can't be silenced using NOQA.
"""
import sys
from django.test import RequestFactory, TestCase
from django.views.debug import ExceptionReporter
class Py3ExceptionReporterTests(TestCase):
rf = RequestFactory()
def test_reporting_of_nested_exceptions(self):
request = self.rf.get('/test_view/')
try:
try:
raise AttributeError('Top level')
except AttributeError as explicit:
try:
raise ValueError('Second exception') from explicit
except ValueError:
raise IndexError('Final exception')
except Exception:
# Custom exception handler, just pass it into ExceptionReporter
exc_type, exc_value, tb = sys.exc_info()
explicit_exc = 'The above exception ({0}) was the direct cause of the following exception:'
implicit_exc = 'During handling of the above exception ({0}), another exception occurred:'
reporter = ExceptionReporter(request, exc_type, exc_value, tb)
html = reporter.get_traceback_html()
# Both messages are twice on page -- one rendered as html,
# one as plain text (for pastebin)
self.assertEqual(2, html.count(explicit_exc.format("Top level")))
self.assertEqual(2, html.count(implicit_exc.format("Second exception")))
text = reporter.get_traceback_text()
self.assertIn(explicit_exc.format("Top level"), text)
self.assertIn(implicit_exc.format("Second exception"), text)
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