Add middleware tests

misago/cache/tests/conftest.py

@@ -0,0 +1,5 @@
+from misago.cache.models import CacheVersion
+
+
+def cache_version():
+    return CacheVersion.objects.create(cache="test_cache")

misago/cache/tests/test_cache_versions_middleware.py

@@ -0,0 +1,48 @@
+from unittest.mock import Mock, PropertyMock, patch
+
+from django.test import TestCase
+from django.utils.functional import SimpleLazyObject
+
+from misago.cache.cache import CACHE_NAME
+from misago.cache.middleware import cache_versions_middleware
+
+
+class MiddlewareTests(TestCase):
+    def test_middleware_sets_attr_on_request(self):
+        get_response = Mock()
+        request = Mock()
+        cache_versions = PropertyMock()
+        type(request).cache_versions = cache_versions
+        middleware = cache_versions_middleware(get_response)
+        middleware(request)
+        cache_versions.assert_called_once()
+
+    def test_attr_set_by_middleware_on_request_is_lazy_object(self):
+        get_response = Mock()
+        request = Mock()
+        cache_versions = PropertyMock()
+        type(request).cache_versions = cache_versions
+        middleware = cache_versions_middleware(get_response)
+        middleware(request)
+        attr_value = cache_versions.call_args[0][0]
+        assert isinstance(attr_value, SimpleLazyObject)
+
+    def test_middleware_calls_get_response(self):
+        get_response = Mock()
+        request = Mock()
+        middleware = cache_versions_middleware(get_response)
+        middleware(request)
+        get_response.assert_called_once()
+
+    def test_middleware_is_not_making_db_query(self):
+        get_response = Mock()
+        request = Mock()
+        with self.assertNumQueries(0):
+            middleware = cache_versions_middleware(get_response)
+            middleware(request)
+
+    def test_middleware_is_not_reading_cache(self):
+        get_response = Mock()
+        request = Mock()
+        middleware = cache_versions_middleware(get_response)
+        middleware(request)

misago/cache/tests/test_invalidating_caches.py

@@ -7,9 +7,7 @@ from misago.cache.cache import (
 )
 from misago.cache.models import CacheVersion
 
-
-def cache_version():
-    return CacheVersion.objects.create(cache="test_cache")
+from .conftest import cache_version
 
 
 class InvalidatingCacheTests(TestCase):