added tests for ReVIEW::Part
added tests for ReVIEW::Part

orangain/review,krororo/review,murashitas/review,kuad9/review_study,suzuki/review,krororo/review,kmuto/review,masawada/review,kmuto/review,kmuto/review,krororo/review,murashitas/review,kdmsnr/review,takahashim/review,takahashim/review,suzuki/review,masawada/review,kuad9/review_study,orangain/review