Added unit test for #738
Added unit test for #738

yaoxiaoyong/DTCoreText,canyu9512/DTCoreText,Akylas/DTCoreText,i-miss-you/DTCoreText,z8927623/DTCoreText,qskycolor/DTCoreText,qskycolor/DTCoreText,1yvT0s/DTCoreText,pivotaltracker/DTCoreText,AmberWhiteSky/DTCoreText,openresearch/DTCoreText,shuoshi/DTCoreText,shuoshi/DTCoreText,devontech/DTCoreText,rain1988/DTCoreText,Esdeath/DTCoreText,canyu9512/DTCoreText,cnbin/DTCoreText,Cocoanetics/DTCoreText,i-miss-you/DTCoreText,AmberWhiteSky/DTCoreText,jingchunYuan/DTCoreText,SanjoDeundiak/DTCoreText,cnbin/DTCoreText,SanjoDeundiak/DTCoreText,gank0326/CoreTextWithHTML,devontech/DTCoreText,wangmb/DTCoreText,wangmb/DTCoreText,rgregg/DTCoreText,sujeking/DTCoreText,z8927623/DTCoreText,niklassaers/DTCoreText,rgregg/DTCoreText,gnr/DTCoreText,sujeking/DTCoreText,Cocoanetics/DTCoreText,programming086/DTCoreText,liuslevis/DTCoreText,youprofit/DTCoreText,iwakevin/DTCoreText,liulinjian/DTCoreText,jingchunYuan/DTCoreText,gank0326/CoreTextWithHTML,iwakevin/DTCoreText,davbeck/DTCoreText,xiaoyanit/DTCoreText,goodheart/DTCoreText,goodheart/DTCoreText,1yvT0s/DTCoreText,davbeck/DTCoreText,CoderJWYang/DTCoreText,liulinjian/DTCoreText,niklassaers/DTCoreText,w2592583/DTCoreText,Cocoanetics/DTCoreText,rain1988/DTCoreText,Akylas/DTCoreText