Unit Test

Code Coverage & Logic Coverage

make sure every executale statement is executed at least once
make sure method every function logic is covered in test

General coverage types in Unit Test:
 Branch Coverage
 Condition Coverage
  - boundary condition
 Loop Coverage
  - Cover the on time, multiple times and maximum times loop execution.
  - Cover zero times and n+1 times loop execution.
 Interface Coverage
 Logic Path Coverage
 Others
  - Exception Handing test
  - Argument Type Cast test
  - Local Variable Usage test

Database operation, three cases should be tested in a unit test.
1. WHERE clause
2. Data definition and operation(INSERT, UPDATE, DELETE)
3. Stored proceedure and function