[PATCH] tests: fix assertion rewriting in some tests with pytest-3.0.0+

[Thomas De Schampheleire]

# HG changeset patch
# User Thomas De Schampheleire <thomas.de.schampheleire at gmail.com>
# Date 1473428048 -7200
#      Fri Sep 09 15:34:08 2016 +0200
# Node ID 6889d3b7435f1c4bb91d24a3af7774323ecbc778
# Parent  59639343672495cb89be54b98f1d6d3a4c44307c
tests: fix assertion rewriting in some tests with pytest-3.0.0+

Since pytest 3.0.0, asserts present in modules that are not directly seen by
pytest as 'test modules', are no longer rewritten to have improved
reporting, unless they are explicitly marked as up-for-rewriting.

This is e.g. the case for asserts in files like
kallithea/tests/api/api_base.py and kallithea/tests/models/common.py.

See
http://doc.pytest.org/en/latest/changelog.html#id13
http://doc.pytest.org/en/latest/writing_plugins.html#assertion-rewriting

diff --git a/kallithea/tests/__init__.py b/kallithea/tests/__init__.py
--- a/kallithea/tests/__init__.py
+++ b/kallithea/tests/__init__.py
@@ -42,6 +42,10 @@ from routes.util import URLGenerator
 from webtest import TestApp
 import pytest
 
+# make sure that all asserts under kallithea/tests benefit from advanced assert
+# reporting, before importing these modules.
+pytest.register_assert_rewrite('kallithea.tests')
+
 from kallithea.lib.compat import unittest
 from kallithea import is_windows
 from kallithea.model.db import Notification, User, UserNotification