README

This project is init with mongoose: 5.10.4 and one test case to run, this is to demo the test passes before upgrading to 5.10.5 and different sinon.useFakeTimers configuration

Uses 3 key library: mongoose, sinon and node-schedule

Use mongoose to create new doc, use node-schedule to schedule an update at a later time, and lastly, use sinon.useFakeTimers to mock time

Test #1

1. npm i
2. npm run test
3. test pass

Test #2

1. update mongoose to 5.10.5 in package.json
2. npm i
3. skip the first test, remove skip from second test
4. test fail

Test #3

1. skip first two test
2. enable third test
3. run test
4. test fail (mocking Date only, scheduler doesn't seem to take effect)

Test #4

1. skip all test except last
2. run test
3. test pass (this is with mocking both Date and setTimeout)