Login, add, delete, query the test point of the module

I used to see an article here saying that to accumulate test points for each common module, and then to design test cases based on these test points when testing is required, I think this is a good way to summarize. My actual experience is not much, according to my in the forum to learn the scattered things and their own imagination, summed up the following points, welcome you continue to add.
1. Login
2. Add
3. Enquiry
4. Delete


1. Login
① user name and password are met (in the form of requirements)
② user name and password do not meet the requirements (format requirements)
③ user name meets the requirements, the password does not meet the requirements (format requirements)
④ password to meet the requirements, the user name does not meet the requirements (format requirements)
⑤ user name or password is empty
⑥ user name not present in the database, password not present
⑦ user name, wrong password, present in the database
⑧ a user name that does not exist in the database, the password that exists
⑨ there are spaces before the data entered
⑩ Enter the correct user name password and press [ENTER] to login

2. Add
① The data items you want to add are reasonable, check that the database has the appropriate data added
② leave a required data blank
③ Design test Cases for other input items according to the principle of boundary value equivalence class design test Cases
④ do not meet the requirements of the place to have a false hint
⑤ whether the table key is supported
⑥ Press ENTER to save
⑦ if the hint can not be saved, but also to see if there is more data in the database

3. Delete
① Delete data that exists in a database and then see if the database is deleted
② Delete data that does not exist in a database, read no error message, and no data is deleted in the database
③ Enter a malformed data to see if there is an error, and no data is deleted in the database.
④ the correct data entered before adding a space to see if the data can be deleted correctly
⑤ don't enter anything.
⑥ If the table key is indicated
⑦ whether the ENTER key is supported

4. Enquiry
Exact query:
① input Query condition is the data that exists in the database, see whether can correctly detect the corresponding data
② Enter the correct query criteria before adding a space to see if the corresponding data can be correctly detected
③ input format or range does not meet the requirements of the data to see if there is an error message
④ data that does not exist in the input database
⑤ do not enter any data
⑥ whether the table key is supported
⑦ whether the ENTER key is supported