添加了几个复杂场景的demo，增加了单元测试#15

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xufei wants to merge 3 commits intodvajs:masterfrom

Commits on Apr 3, 2017

添加了几个复杂场景的demo
xufei
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Commits on Apr 6, 2017

add unit tests
xufei
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Commits on Apr 7, 2017

fix user model
xufei
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