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7c4289d0b9
Using __str__() and then repr'ing the result looks strange and can lead to recursive rendering of forms.
127 lines
4.6 KiB
Python
127 lines
4.6 KiB
Python
import logging
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from django.template import Context, Engine, Variable, VariableDoesNotExist
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from django.test import SimpleTestCase, ignore_warnings
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from django.utils.deprecation import RemovedInDjango21Warning
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class TestHandler(logging.Handler):
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def __init__(self):
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super().__init__()
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self.log_record = None
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def emit(self, record):
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self.log_record = record
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class BaseTemplateLoggingTestCase(SimpleTestCase):
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def setUp(self):
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self.test_handler = TestHandler()
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self.logger = logging.getLogger('django.template')
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self.original_level = self.logger.level
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self.logger.addHandler(self.test_handler)
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self.logger.setLevel(self.loglevel)
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def tearDown(self):
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self.logger.removeHandler(self.test_handler)
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self.logger.level = self.original_level
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class VariableResolveLoggingTests(BaseTemplateLoggingTestCase):
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loglevel = logging.DEBUG
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def test_log_on_variable_does_not_exist_silent(self):
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class TestObject:
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class SilentDoesNotExist(Exception):
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silent_variable_failure = True
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@property
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def template_name(self):
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return "template_name"
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@property
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def template(self):
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return Engine().from_string('')
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@property
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def article(self):
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raise TestObject.SilentDoesNotExist("Attribute does not exist.")
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def __iter__(self):
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return iter(attr for attr in dir(TestObject) if attr[:2] != "__")
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def __getitem__(self, item):
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return self.__dict__[item]
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Variable('article').resolve(TestObject())
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self.assertEqual(
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self.test_handler.log_record.getMessage(),
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"Exception while resolving variable 'article' in template 'template_name'."
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)
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self.assertIsNotNone(self.test_handler.log_record.exc_info)
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raised_exception = self.test_handler.log_record.exc_info[1]
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self.assertEqual(str(raised_exception), 'Attribute does not exist.')
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def test_log_on_variable_does_not_exist_not_silent(self):
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with self.assertRaises(VariableDoesNotExist):
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Variable('article.author').resolve({'article': {'section': 'News'}})
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self.assertEqual(
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self.test_handler.log_record.getMessage(),
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"Exception while resolving variable 'author' in template 'unknown'."
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)
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self.assertIsNotNone(self.test_handler.log_record.exc_info)
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raised_exception = self.test_handler.log_record.exc_info[1]
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self.assertEqual(
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str(raised_exception),
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"Failed lookup for key [author] in {'section': 'News'}"
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)
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def test_no_log_when_variable_exists(self):
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Variable('article.section').resolve({'article': {'section': 'News'}})
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self.assertIsNone(self.test_handler.log_record)
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class IncludeNodeLoggingTests(BaseTemplateLoggingTestCase):
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loglevel = logging.WARN
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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cls.engine = Engine(loaders=[
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('django.template.loaders.locmem.Loader', {
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'child': '{{ raises_exception }}',
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}),
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], debug=False)
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def error_method():
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raise IndexError("some generic exception")
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cls.ctx = Context({'raises_exception': error_method})
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def test_logs_exceptions_during_rendering_with_debug_disabled(self):
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template = self.engine.from_string('{% include "child" %}')
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template.name = 'template_name'
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with ignore_warnings(category=RemovedInDjango21Warning):
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self.assertEqual(template.render(self.ctx), '')
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self.assertEqual(
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self.test_handler.log_record.getMessage(),
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"Exception raised while rendering {% include %} for template "
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"'template_name'. Empty string rendered instead."
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)
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self.assertIsNotNone(self.test_handler.log_record.exc_info)
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self.assertEqual(self.test_handler.log_record.levelno, logging.WARN)
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def test_logs_exceptions_during_rendering_with_no_template_name(self):
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template = self.engine.from_string('{% include "child" %}')
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with ignore_warnings(category=RemovedInDjango21Warning):
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self.assertEqual(template.render(self.ctx), '')
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self.assertEqual(
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self.test_handler.log_record.getMessage(),
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"Exception raised while rendering {% include %} for template "
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"'unknown'. Empty string rendered instead."
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)
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self.assertIsNotNone(self.test_handler.log_record.exc_info)
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self.assertEqual(self.test_handler.log_record.levelno, logging.WARN)
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