Merged regressiontests and modeltests into the test root.

tests/cache/closeable_cache.py

@@ -0,0 +1,11 @@
+from django.core.cache.backends.locmem import LocMemCache
+
+
+class CloseHookMixin(object):
+    closed = False
+
+    def close(self, **kwargs):
+        self.closed = True
+
+class CacheClass(CloseHookMixin, LocMemCache):
+    pass

tests/cache/liberal_backend.py

@@ -0,0 +1,10 @@
+from django.core.cache.backends.locmem import LocMemCache
+
+
+class LiberalKeyValidationMixin(object):
+    def validate_key(self, key):
+        pass
+
+class CacheClass(LiberalKeyValidationMixin, LocMemCache):
+    pass
+

tests/cache/models.py

@@ -0,0 +1,13 @@
+from django.utils import timezone
+
+from django.db import models
+
+
+def expensive_calculation():
+    expensive_calculation.num_runs += 1
+    return timezone.now()
+
+class Poll(models.Model):
+    question = models.CharField(max_length=200)
+    answer = models.CharField(max_length=200)
+    pub_date = models.DateTimeField('date published', default=expensive_calculation)