tailieunhanh - Lecture Introduction to software engineering: Week 9 - Nguyễn Thị Minh Tuyền

Lecture "Introduction to software engineering - Week 9: Software testing" has contents: Development testing, test-driven development, release testing, user testing. Invite you to find out the detailed content. | Lecture Introduction to software engineering: Week 9 - Nguyễn Thị Minh Tuyền Week 9: Software Testing Nguyễn Thị Minh Tuyền Adapted from slides of Ian Sommerville Software Testing 1. What is it? 2. Who does it? 3. What are the steps? 4. What is the work product? 5. How do I ensure that I’ve done it right? Topics covered 1. Development testing 2. Test-driven development 3. Release testing 4. User testing 3 Program testing £ Testing is intended p to show that a program does what it is intended to do and p to discover program defects before it is put into use. £ When you test software, you execute a program using artificial data. £ You check the results of the test run for errors, anomalies or information about the program's non- functional attributes. £ Can reveal the presence of errors NOT their absence. £ Testing is part of a more general verification and validation process, which also includes static validation techniques. 4 Program testing goals Validation testing To demonstrate to the developer and the customer that the software meets its requirements. Defect testing To discover situations in which the behavior of the software is incorrect, undesirable or does not conform to its specification. 5 An input-output model of program testing Input test data Inputs causing Ie anomalous behaviour System Outputs which reveal Output test results Oe the presence of defects 6 Verification vs validation £ Verification: "Are we building the product right”. p The software should conform to its specification. £ Validation: "Are we building .

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