1. Significance of Test Coverage Sep 2011

2. Contents Meaning of test coverage Business importance for test coverage Types of test coverage Tools for test coverage Test coverage in Agile Test coverage in Risk based testing Test coverage and Regression test decisions Interpretation of test coverage numbers

3. Meaning of test coverage Total number of requirements tested against the total number of requirements in scope

5. Sometimes it is a contractual requirement to show 100% test coverage

6. Effectiveness of other defect metrics depends on test coverage

8. Tools for test coverage Requirement traceability matrix

9. Test coverage in Agile Sprint 2 Sprint n Sprint 3 Sprint 1 Reg Test coverage 0% Reg Test coverage 65% RegTest coverage 85% Reg Test coverage 70% Release X Reg Test coverage 100%

11. In this case test coverage cannot be 100%

12. For such situations, we need to calculate & ensure “Critical” and “High” complexity scenario coverage separately

14. 100% regression testing for all cycles is impractical

15. We need functional dependency matrix to do impact analysis

16. Further we need Req Traceability matrix to decide the test scenariosRequirement Traceability Matrix Functional Dependency Matrix

17. Interpretation of test coverageDSI trend Vs Test coverage Project A – DSI increases along with test coverage in cycle 3 Project B – DSI decreases over cycle after cycle even if the coverage is increased in the regression test

18. Thank You