func (s *HookContextSuite) AssertStorageContext(c *gc.C, ctx *context.HookContext, id string, attachment storage.StorageAttachmentInfo) {
fromCache, err := ctx.HookStorage()
c.Assert(err, jc.ErrorIsNil)
c.Assert(fromCache, gc.NotNil)
c.Assert(fromCache.Tag().Id(), gc.Equals, id)
c.Assert(fromCache.Kind(), gc.Equals, attachment.Kind)
c.Assert(fromCache.Location(), gc.Equals, attachment.Location)
}
func (s *HookContextSuite) AssertNotStorageContext(c *gc.C, ctx *context.HookContext) {
storageAttachment, err := ctx.HookStorage()
c.Assert(storageAttachment, gc.IsNil)
c.Assert(err, gc.ErrorMatches, ".*")
}