为什么jasmine无法比较knockout.js可观察对象，但是可以使用普通函数？

I was writing jasmine test today and had to mock an knockout.js object result and to my surprise they were not equal although objects looked identical. After eliminating properties I narrowed it down to knockout.js observable. Below are two tests knockout one is failing while the one with function is successful.I was writing jasmine test today and had to moc