Made inspectdb tests deal with a smaller generated models.py file.

Implemented this by adding a stealth table_name_filter option for the
command.

django/core/management/commands/inspectdb.py

@@ -26,6 +26,8 @@ class Command(NoArgsCommand):
 
     def handle_inspection(self, options):
         connection = connections[options.get('database')]
+        # 'table_name_filter' is a stealth option
+        table_name_filter = options.get('table_name_filter')
 
         table2model = lambda table_name: table_name.title().replace('_', '').replace(' ', '').replace('-', '')
 
@@ -43,6 +45,9 @@ class Command(NoArgsCommand):
         yield ''
         known_models = []
         for table_name in connection.introspection.table_names(cursor):
+            if table_name_filter is not None and callable(table_name_filter):
+                if not table_name_filter(table_name):
+                    continue
             yield 'class %s(models.Model):' % table2model(table_name)
             known_models.append(table2model(table_name))
             try:

tests/regressiontests/inspectdb/tests.py

@@ -6,10 +6,31 @@ from django.test import TestCase, skipUnlessDBFeature
 
 class InspectDBTestCase(TestCase):
 
+    def test_stealth_table_name_filter_option(self):
+        out = StringIO()
+        # Lets limit the introspection to tables created for models of this
+        # application
+        call_command('inspectdb',
+                     table_name_filter=lambda tn:tn.startswith('inspectdb_'),
+                     stdout=out)
+        error_message = "inspectdb has examined a table that should have been filtered out."
+        # contrib.contenttypes is one of the apps always installed when running
+        # the Django test suite, check that one of its tables hasn't been
+        # inspected
+        self.assertNotIn("class DjangoContentType(models.Model):", out.getvalue(), msg=error_message)
+        out.close()
+
     @skipUnlessDBFeature('can_introspect_foreign_keys')
     def test_attribute_name_not_python_keyword(self):
         out = StringIO()
-        call_command('inspectdb', stdout=out)
+        # Lets limit the introspection to tables created for models of this
+        # application
+        call_command('inspectdb',
+                     table_name_filter=lambda tn:tn.startswith('inspectdb_'),
+                     stdout=out)
+        f = open('/home/ramiro/models2.py', 'w')
+        f.write(out.getvalue())
+        f.close()
         error_message = "inspectdb generated an attribute name which is a python keyword"
         self.assertNotIn("from = models.ForeignKey(InspectdbPeople)", out.getvalue(), msg=error_message)
         # As InspectdbPeople model is defined after InspectdbMessage, it should be quoted
@@ -23,7 +44,11 @@ class InspectDBTestCase(TestCase):
     def test_digits_column_name_introspection(self):
         """Introspection of column names consist/start with digits (#16536/#17676)"""
         out = StringIO()
-        call_command('inspectdb', stdout=out)
+        # Lets limit the introspection to tables created for models of this
+        # application
+        call_command('inspectdb',
+                     table_name_filter=lambda tn:tn.startswith('inspectdb_'),
+                     stdout=out)
         error_message = "inspectdb generated a model field name which is a number"
         self.assertNotIn("    123 = models.CharField", out.getvalue(), msg=error_message)
         self.assertIn("number_123 = models.CharField", out.getvalue())