What Test Techniques are there and what is their purpose?

Test Techniques are primarily used for two purposes: a) To help identify defects, b) To reduce the number of test cases.

• Equivalence partitioning is mainly used to reduce number of test cases by identifying different sets of data that are not the same and only executing one test from each set of data

• Boundary Value Analysis is used to check the behaviour of the system at the boundaries of allowed data.

• State Transition Testing is used to validate allowed and disallowed states and transitions from one state to another by various input data

• Pair-wise or All Pairs Testing is a very powerful test technique and is mainly used to reduce the number of test cases while increasing the coverage of feature combinations.