When used in database
1. For some important data (amount) to see if there is no written into the database.
2. For some of the data modify their status, to facilitate testing.
When used in Linux
1. Check the log tail -f log file
Buried test (for the number of buttons used to analyze the user's favorite)
When used fiddler
1. Look there is no important data encryption.
2. When a breakpoint, modify data, to see whether the normal operation of the data.
(For example: electricity supplier project, when sent to the server's price breakpoints, modify the price, whether the normal transmission)
(Example: electric business project, the server sends the prices to the front when the breakpoint, modify the price, whether the normal transmission)
Distinguish between front-end or back-end bug
By packet capture, setting breakpoints, see the data or information transmitted, to return data or information to determine a front end or a rear end of the bug