jgs CSC 309 Software Engineering II Lecture 08: Test Coverage Dr. Javier Gonzalez-Sanchez [email protected] www.javiergs.com Building 14 -227 Office Hours: By appointment
jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 3 § Validation. It is about requirements. Are we building the right product? Does this software do what it needs to do? § Verification. It is about design. Are we building the product right? Does this meet its requirements? § Testing. Examination of the behavior of a program by executing it on sample data sets. Definition
jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 7 § Unit testing is the testing of an individual unit or group of related units. § It test that a unit is producing expected output against given input. § Each Unit developer must define Unit Test Cases for that Unit. § Unit Testing Frameworks are tools and libraries that help to implement the Unit Testing process. Example JUnit Unit Testing
jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 11 § Statement Coverage: every statement is executed at least 1 time. § Decision Coverage: every decision point is executed at least 1 time § Decision-Condition Coverage: every decision tested with all possible outcomes Coverage
jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 13 1. if (x<1 || y>5 && z!=0 || flag==true && s==null) 2. doThis(); 3. else 4. doThat(); § How many Test cases are needed to Test for 100% statement coverage? § How many Test cases are needed to Test for 100% decision coverage? § How many Test cases are needed to Test for 100% decision-condition coverage? Decision-Condition Coverage
jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 16 1. if (a <10 || b>5) 2. x = 50 3. else 4. x = 0; 5. if (w == 5 || y>0) 6. z = 48; 7. else 8. z = 5; Total Statements? Statement Coverage with a = 0, b=0, w=0, y=0 ? Statement Coverage with a=10, b=4, w=5, y = anything ? Note: Remember that coverage is cumulative Test Yourselves
jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 20 Office Hours Tuesday and Thursday 3 - 5 pm But an appointment required Sent me an email – [email protected]
jgs CSC 309 Software Engineering II Lab 08: Coverage Dr. Javier Gonzalez-Sanchez [email protected] www.javiergs.com Building 14 -227 Office Hours: By appointment
jgs CSC 309 Software Engineering II Javier Gonzalez-Sanchez, Ph.D. [email protected] Winter 2023 Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly. They cannot be distributed or used for another purpose.