[test] Add unit tests for isSameMoment and isSameMoment forUnit.
[test] Add unit tests for isSameMoment and isSameMoment forUnit.

samwize/YLMoment,yannickl/YLMoment,samwize/YLMoment,strictlyd/YLMoment,samwize/YLMoment,yannickl/YLMoment,strictlyd/YLMoment