require'spec_helper'describeFasterCacheKeysdodescribe'#cache_key'doit'returns a String'do# We're using a fixed string here so it's easier to set an expectation for# the resulting cache key.time='2016-08-08 16:39:00+02'issue=build(:issue,updated_at: time)issue.extend(described_class)expect(issue).toreceive(:id).and_return(1)expect(issue.cache_key).toeq("issues/1-#{time}")endendend