created HtmlBoldNiconicoWebTextSegmentTest
implemented HtmlBoldNiconicoWebTextSegmentTest
created HtmlAnchorNiconicoWebTextSegment
implemented HtmlAnchorNiconicoWebTextSegmentTest
created CommunityIdNiconicoWebTextSegment
implemented CommunityIdNiconicoWebTextSegmentTest
implemented ChannelIdNiconicoWebTextSegmentTest
created ArticleIdNiconicoWebTextSegmentTest
implemented ArticleIdNiconicoWebTextSegmentTest