Types of test data design techniques?

1. Boundary Value analysis

     Test the planned limits of the software. Test the valid ,last possible and invalid data just outside the boundary.

    Boundary types;

• numeric
• Character
• Position
• Quantity
• Speed
• location

2. Equivalence partitioning

     An equivalence class or partition is a set of test cases that test the same thing or revals the same bug.

3. special value

     select the test data on the basis of features of a function tester use the domain knowledge or prior experience or error guessing.

4. Error based

Generate the test cases based on

• programmer histories
• programmer complexity
• knowledge of error prone syntactic construct

Guess error based on data type

5. Input/output domain.

• Looking from input sides , generate inputs to map to outputs
• also ensure that you look from output side to ensure that you have generated all possible inputs.