Structure Based Test Design Techniques

White Box Testing Techniques

What is structure based testing?

Structure based testing is also referred to as white-box testing. In this technique, the knowledge of the code and internal architecture of the system is required to carry out the testing.

Structure based testing techniques

The different types of structure based test design or the white box testing techniques are-

  • Statement testing - Statement testing is a white box testing approach in which test scripts are designed to execute code statements. The statement coverage is the measure of the percentage of statements of code executed by the test scripts out of the total code statements in the application. The statement coverage is the least preferred metric for checking test coverage.

  • Decision testing/branch testing - Decision testing or branch testing is a white box testing approach in which test coverage is measured by the percentage of decision points(e.g. if-else conditions) executed out of the total decision points in the application.

  • Condition testing - Testing the condition outcomes(TRUE or FALSE). So, getting 100% condition coverage required exercising each condition for both TRUE and FALSE results using test scripts(For n conditions we will have 2n test scripts).

  • Multiple condition testing - Testing the different combinations of condition outcomes. Hence for 100% coverage we will have 2^n test scripts. This is very exhaustive and very difficult to achieve 100% coverage.

  • Condition determination testing - It is an optimized way of multiple condition testing in which the combinations which doesn't affect the outcomes are discarded.

  • Path testing - Testing the independent paths in the system(paths are executable statements from entry to exit points).