• 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 it requirements? • Testing. Examination of the behavior of a program by executing it on sample data sets.
Testing • 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
• 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 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 ? Coverage is cumulative
Coverage 1. if (x<1 || y>5 a&& z!=0 || flag== T && s==NIL) 2. doThis(); 3. else 4. doThat(); Total Statements? Test cases needed for 100% statement coverage? Test cases needed for Test for 100% decision coverage? Test cases needed for Test for 100% decision-condition coverage?