[1.2.X] Migrated signals_regress doctests. Thanks to Stephan Jaekel.

Backport of r13896 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13917 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/signals_regress/models.py

@@ -1,7 +1,3 @@
-"""
-Testing signals before/after saving and deleting.
-"""
-
 from django.db import models
 
 class Author(models.Model):
@@ -16,74 +12,3 @@ class Book(models.Model):
 
     def __unicode__(self):
         return self.name
-
-def pre_save_test(signal, sender, instance, **kwargs):
-    print 'pre_save signal,', instance
-    if kwargs.get('raw'):
-        print 'Is raw'
-
-def post_save_test(signal, sender, instance, **kwargs):
-    print 'post_save signal,', instance
-    if 'created' in kwargs:
-        if kwargs['created']:
-            print 'Is created'
-        else:
-            print 'Is updated'
-    if kwargs.get('raw'):
-        print 'Is raw'
-
-def pre_delete_test(signal, sender, instance, **kwargs):
-    print 'pre_delete signal,', instance
-    print 'instance.id is not None: %s' % (instance.id != None)
-
-def post_delete_test(signal, sender, instance, **kwargs):
-    print 'post_delete signal,', instance
-    print 'instance.id is not None: %s' % (instance.id != None)
-
-__test__ = {'API_TESTS':"""
-
-# 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)
->>> 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(pre_save_test)
->>> models.signals.post_save.connect(post_save_test)
->>> models.signals.pre_delete.connect(pre_delete_test)
->>> models.signals.post_delete.connect(post_delete_test)
-
->>> a1 = Author(name='Neal Stephenson')
->>> a1.save()
-pre_save signal, Neal Stephenson
-post_save signal, Neal Stephenson
-Is created
-
->>> b1 = Book(name='Snow Crash')
->>> b1.save()
-pre_save signal, Snow Crash
-post_save signal, Snow Crash
-Is created
-
-# Assigning to m2m shouldn't generate an m2m signal
->>> b1.authors = [a1]
-
-# Removing an author from an m2m shouldn't generate an m2m signal
->>> b1.authors = []
-
->>> models.signals.post_delete.disconnect(post_delete_test)
->>> models.signals.pre_delete.disconnect(pre_delete_test)
->>> models.signals.post_save.disconnect(post_save_test)
->>> models.signals.pre_save.disconnect(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))
-
->>> pre_signals == post_signals
-True
-
-"""}

tests/regressiontests/signals_regress/tests.py

@@ -0,0 +1,96 @@
+import sys
+from StringIO import StringIO
+from django.test import TestCase
+
+from django.db import models
+from regressiontests.signals_regress.models import Author, Book
+
+signal_output = []
+
+def pre_save_test(signal, sender, instance, **kwargs):
+    signal_output.append('pre_save signal, %s' % instance)
+    if kwargs.get('raw'):
+        signal_output.append('Is raw')
+
+def post_save_test(signal, sender, instance, **kwargs):
+    signal_output.append('post_save signal, %s' % instance)
+    if 'created' in kwargs:
+        if kwargs['created']:
+            signal_output.append('Is created')
+        else:
+            signal_output.append('Is updated')
+    if kwargs.get('raw'):
+        signal_output.append('Is raw')
+
+def pre_delete_test(signal, sender, instance, **kwargs):
+    signal_output.append('pre_save signal, %s' % instance)
+    signal_output.append('instance.id is not None: %s' % (instance.id != None))
+
+def post_delete_test(signal, sender, instance, **kwargs):
+    signal_output.append('post_delete signal, %s' % instance)
+    signal_output.append('instance.id is not None: %s' % (instance.id != None))
+
+class SignalsRegressTests(TestCase):
+    """
+    Testing signals before/after saving and deleting.
+    """
+
+    def get_signal_output(self, fn, *args, **kwargs):
+        # Flush any existing signal output
+        global signal_output
+        signal_output = []
+        fn(*args, **kwargs)
+        return signal_output
+
+    def setUp(self):
+        # 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(pre_save_test)
+        models.signals.post_save.connect(post_save_test)
+        models.signals.pre_delete.connect(pre_delete_test)
+        models.signals.post_delete.connect(post_delete_test)
+
+    def tearDown(self):
+        models.signals.post_delete.disconnect(post_delete_test)
+        models.signals.pre_delete.disconnect(pre_delete_test)
+        models.signals.post_save.disconnect(post_save_test)
+        models.signals.pre_save.disconnect(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.assertEquals(self.pre_signals, post_signals)
+
+    def test_model_signals(self):
+        """ Model saves should throw some signals. """
+        a1 = Author(name='Neal Stephenson')
+        self.assertEquals(self.get_signal_output(a1.save), [
+            "pre_save signal, Neal Stephenson",
+            "post_save signal, Neal Stephenson",
+            "Is created"
+        ])
+
+        b1 = Book(name='Snow Crash')
+        self.assertEquals(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.assertEquals(self.get_signal_output(setattr, b1, 'authors', [a1]), [])
+        self.assertEquals(self.get_signal_output(setattr, b1, 'authors', []), [])