Girl rejected me why does she keep shit testing me?

Anonymous
So my co-worker rejected harshly I might add, but when I saw her for the first time again, she talked to me normally, but wouldn't look me in the eyes. She then shit tests me as I leave and asked me if I could get her breakfast, I told her sure, but if you buy me some too, but I'll just watch your desk for you, she said "nevermind" so I normally talk to her 15-30mns a day but after the rejection I'd figure I'd keep things civil and just be polite but keep to myself. So close to the end of the day, a co-worker tells me the girl is looking for me, I figured she probably wants to talk and I thought no reason to waste my time. When I make it to my office she's waiting for me outside, she said why don't​ I answer my work phone I tell her I was out. She then compliments my shoes and I shouldn't wear my white shoes to work. I tell her I bought new ones, and this is my every day pair now, she said "yeah cause you really needed new ones" I tell her my shoes are two years old and the only reason I they look new is because I care for them" I told her "you know how I feel about my shoes" reminding her on the time she stepped on them and told her I was gonna have her clean them. She laughed and said "Oh no I remember" she then left.

My question is why is she seeking me and testing me if she rejected me?
Girl rejected me why does she keep shit testing me?
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