func testRetrieveImages(storage cluster.Storage, t *testing.T) {
defer storage.RemoveImage("img-1", "id1", "host-1.something")
defer storage.RemoveImage("img-1", "id1", "host-2")
defer storage.RemoveImage("img-1", "id2", "host-2")
err := storage.StoreImage("img-1", "id1", "host-1.something")
assertIsNil(err, t)
err = storage.StoreImage("img-1", "id1", "host-2")
assertIsNil(err, t)
imgs, err := storage.RetrieveImages()
assertIsNil(err, t)
if len(imgs) != 2 {
t.Errorf("Unexpected len %d - expected %d", len(imgs), 2)
}
}