Added more tests to the file api to increase coverage.
Added more tests to the file api to increase coverage.

jcfr/girder,chrismattmann/girder,adsorensen/girder,adsorensen/girder,girder/girder,salamb/girder,girder/girder,opadron/girder,essamjoubori/girder,jcfr/girder,salamb/girder,kotfic/girder,RafaelPalomar/girder,chrismattmann/girder,essamjoubori/girder,Kitware/girder,RafaelPalomar/girder,jcfr/girder,sutartmelson/girder,data-exp-lab/girder,sutartmelson/girder,jcfr/girder,essamjoubori/girder,msmolens/girder,salamb/girder,data-exp-lab/girder,adsorensen/girder,RafaelPalomar/girder,opadron/girder,chrismattmann/girder,RafaelPalomar/girder,manthey/girder,Xarthisius/girder,jcfr/girder,Xarthisius/girder,salamb/girder,jbeezley/girder,chrismattmann/girder,Kitware/girder,Kitware/girder,kotfic/girder,adsorensen/girder,data-exp-lab/girder,Kitware/girder,kotfic/girder,Xarthisius/girder,manthey/girder,sutartmelson/girder,girder/girder,opadron/girder,adsorensen/girder,jbeezley/girder,salamb/girder,data-exp-lab/girder,msmolens/girder,data-exp-lab/girder,RafaelPalomar/girder,msmolens/girder,kotfic/girder,girder/girder,opadron/girder,kotfic/girder,manthey/girder,jbeezley/girder,chrismattmann/girder,Xarthisius/girder,sutartmelson/girder,opadron/girder,msmolens/girder,essamjoubori/girder,Xarthisius/girder,msmolens/girder,jbeezley/girder,essamjoubori/girder,manthey/girder,sutartmelson/girder