[1.3.X] Fixed #16681 -- Refactored the invalid_models unit test so that it can...

    Sean Brant

    Andrew Brehaut <http://brehaut.net/blog>

    David Brenneman <http://davidbrenneman.com>

    Anthony Briggs <anthony.briggs@gmail.com>

    brut.alll@gmail.com

    bthomas

    btoll@bestweb.net

import sys

from django.utils import unittest

class InvalidModelTestCase(unittest.TestCase):

    """Import an appliation with invalid models and test the exceptions."""

    def test_invalid_models(self):

        from django.core.management.validation import get_validation_errors

        from django.db.models.loading import load_app

        from cStringIO import StringIO

        try:

            module = load_app("modeltests.invalid_models.invalid_models")

        except Exception, e:

            self.fail('Unable to load invalid model module')

        # Make sure sys.stdout is not a tty so that we get errors without

        # coloring attached (makes matching the results easier). We restore

        # sys.stderr afterwards.

        orig_stdout = sys.stdout

        s = StringIO()

        sys.stdout = s

        count = get_validation_errors(s, module)

        sys.stdout = orig_stdout

        s.seek(0)

        error_log = s.read()

        actual = error_log.split('\n')

        expected = module.model_errors.split('\n')

        unexpected = [err for err in actual if err not in expected]

        missing = [err for err in expected if err not in actual]

        self.assertFalse(unexpected, "Unexpected Errors: " + '\n'.join(unexpected))

        self.assertFalse(missing, "Missing Errors: " + '\n'.join(missing))