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Added EXPLAIN_TEMPLATE_LOADING to help people debug templates not being loaded.

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This commit is contained in:
Armin Ronacher 2014-09-03 17:57:44 +02:00
parent f17ad953dd
commit bafc139810
11 changed files with 172 additions and 17 deletions
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42
flask/testsuite/templating.py
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@ -11,6 +11,9 @@
import flask
import unittest
import logging
from jinja2 import TemplateNotFound
from flask.testsuite import FlaskTestCase
@ -303,6 +306,45 @@ class TemplatingTestCase(FlaskTestCase):
app.config['TEMPLATES_AUTO_RELOAD'] = False
self.assert_false(app.jinja_env.auto_reload)
def test_template_loader_debugging(self):
from blueprintapp import app
called = []
class _TestHandler(logging.Handler):
def handle(x, record):
called.append(True)
text = unicode(record.msg)
self.assert_('1: trying loader of application '
'"blueprintapp"' in text)
self.assert_('2: trying loader of blueprint "admin" '
'(blueprintapp.apps.admin)' in text)
self.assert_('trying loader of blueprint "frontend" '
'(blueprintapp.apps.frontend)' in text)
self.assert_('Error: the template could not be found' in text)
self.assert_('looked up from an endpoint that belongs to '
'the blueprint "frontend"' in text)
self.assert_(
'See http://flask.pocoo.org/docs/blueprints/#templates' in text)
with app.test_client() as c:
try:
old_load_setting = app.config['EXPLAIN_TEMPLATE_LOADING']
old_handlers = app.logger.handlers[:]
app.logger.handlers = [_TestHandler()]
app.config['EXPLAIN_TEMPLATE_LOADING'] = True
try:
c.get('/missing')
except TemplateNotFound as e:
self.assert_('missing_template.html' in str(e))
else:
self.fail('Expected template not found exception.')
finally:
app.logger.handlers[:] = old_handlers
app.config['EXPLAIN_TEMPLATE_LOADING'] = old_load_setting
self.assert_equal(len(called), 1)
def suite():
suite = unittest.TestSuite()