Extend fake image service to let it hold image data

Make the fake image service able to store image data in memory. This is
handy for unit testing, but probably not very useful otherwise (images
are pretty big, so holding them in memory is not a very good idea).

Change-Id: I2d07baf24cab544e19521b9486feee3272d0407e

1 files changed, 8 insertions, 0 deletions

diff --git a/nova/image/fake.py b/nova/image/fake.py
index a51a8ecb4..43e889ad4 100644
--- a/nova/image/fake.py
+++ b/nova/image/fake.py
@@ -118,6 +118,7 @@ class _FakeImageService(object):
         self.create(None, image3)
         self.create(None, image4)
         self.create(None, image5)
+        self._imagedata = {}
         super(_FakeImageService, self).__init__()
 
     def index(self, context, filters=None, marker=None, limit=None):
@@ -132,6 +133,11 @@ class _FakeImageService(object):
         """Return list of detailed image information."""
         return copy.deepcopy(self.images.values())
 
+    def get(self, context, image_id, data):
+        metadata = self.show(context, image_id)
+        data.write(self._imagedata.get(image_id, ''))
+        return metadata
+
     def show(self, context, image_id):
         """Get data about specified image.
 
@@ -164,6 +170,8 @@ class _FakeImageService(object):
         if image_id in self.images:
             raise exception.Duplicate()
         self.images[image_id] = copy.deepcopy(metadata)
+        if data:
+            self._imagedata[image_id] = data.read()
         return self.images[image_id]
 
     def update(self, context, image_id, metadata, data=None):