96 lines
3.8 KiB
Python
96 lines
3.8 KiB
Python
from __future__ import unicode_literals
|
|
|
|
from django.db import models
|
|
from django.test import TestCase
|
|
|
|
from .models import Author, Book
|
|
|
|
|
|
class SignalsRegressTests(TestCase):
|
|
"""
|
|
Testing signals before/after saving and deleting.
|
|
"""
|
|
|
|
def get_signal_output(self, fn, *args, **kwargs):
|
|
# Flush any existing signal output
|
|
self.signal_output = []
|
|
fn(*args, **kwargs)
|
|
return self.signal_output
|
|
|
|
def pre_save_test(self, signal, sender, instance, **kwargs):
|
|
self.signal_output.append('pre_save signal, %s' % instance)
|
|
if kwargs.get('raw'):
|
|
self.signal_output.append('Is raw')
|
|
|
|
def post_save_test(self, signal, sender, instance, **kwargs):
|
|
self.signal_output.append('post_save signal, %s' % instance)
|
|
if 'created' in kwargs:
|
|
if kwargs['created']:
|
|
self.signal_output.append('Is created')
|
|
else:
|
|
self.signal_output.append('Is updated')
|
|
if kwargs.get('raw'):
|
|
self.signal_output.append('Is raw')
|
|
|
|
def pre_delete_test(self, signal, sender, instance, **kwargs):
|
|
self.signal_output.append('pre_save signal, %s' % instance)
|
|
self.signal_output.append('instance.id is not None: %s' % (instance.id != None))
|
|
|
|
def post_delete_test(self, signal, sender, instance, **kwargs):
|
|
self.signal_output.append('post_delete signal, %s' % instance)
|
|
self.signal_output.append('instance.id is not None: %s' % (instance.id != None))
|
|
|
|
def setUp(self):
|
|
self.signal_output = []
|
|
# Save up the number of connected signals so that we can check at the end
|
|
# that all the signals we register get properly unregistered (#9989)
|
|
self.pre_signals = (len(models.signals.pre_save.receivers),
|
|
len(models.signals.post_save.receivers),
|
|
len(models.signals.pre_delete.receivers),
|
|
len(models.signals.post_delete.receivers))
|
|
|
|
models.signals.pre_save.connect(self.pre_save_test)
|
|
models.signals.post_save.connect(self.post_save_test)
|
|
models.signals.pre_delete.connect(self.pre_delete_test)
|
|
models.signals.post_delete.connect(self.post_delete_test)
|
|
|
|
def tearDown(self):
|
|
models.signals.post_delete.disconnect(self.post_delete_test)
|
|
models.signals.pre_delete.disconnect(self.pre_delete_test)
|
|
models.signals.post_save.disconnect(self.post_save_test)
|
|
models.signals.pre_save.disconnect(self.pre_save_test)
|
|
|
|
# Check that all our signals got disconnected properly.
|
|
post_signals = (len(models.signals.pre_save.receivers),
|
|
len(models.signals.post_save.receivers),
|
|
len(models.signals.pre_delete.receivers),
|
|
len(models.signals.post_delete.receivers))
|
|
|
|
self.assertEqual(self.pre_signals, post_signals)
|
|
|
|
def test_model_signals(self):
|
|
""" Model saves should throw some signals. """
|
|
a1 = Author(name='Neal Stephenson')
|
|
self.assertEqual(self.get_signal_output(a1.save), [
|
|
"pre_save signal, Neal Stephenson",
|
|
"post_save signal, Neal Stephenson",
|
|
"Is created"
|
|
])
|
|
|
|
b1 = Book(name='Snow Crash')
|
|
self.assertEqual(self.get_signal_output(b1.save), [
|
|
"pre_save signal, Snow Crash",
|
|
"post_save signal, Snow Crash",
|
|
"Is created"
|
|
])
|
|
|
|
def test_m2m_signals(self):
|
|
""" Assigning and removing to/from m2m shouldn't generate an m2m signal """
|
|
|
|
b1 = Book(name='Snow Crash')
|
|
self.get_signal_output(b1.save)
|
|
a1 = Author(name='Neal Stephenson')
|
|
self.get_signal_output(a1.save)
|
|
self.assertEqual(self.get_signal_output(setattr, b1, 'authors', [a1]), [])
|
|
self.assertEqual(self.get_signal_output(setattr, b1, 'authors', []), [])
|