Improved unit-test framework so that it handles database errors more elegantly

git-svn-id: http://code.djangoproject.com/svn/django/trunk@446 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/runtests.py

@@ -111,7 +111,12 @@ class TestRunner:
             # has side effects on doctest TestRunner class.
             runner = DjangoDoctestRunner(verbosity_level=verbosity_level, verbose=False)
             self.output(1, "%s model: Running tests" % model_name)
+            try:
                 runner.run(dtest, clear_globs=True, out=sys.stdout.write)
+            finally:
+                # Rollback, in case of database errors. Otherwise they'd have
+                # side effects on other tests.
+                db.rollback()
 
         # Run the non-model tests in the other tests dir
         self.output(1, "Running other tests")