SE-323
Software
Verification &
Validation
Lecture: 03
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Software Verification and Validation: Concepts, Techniques, and Best Practices, Summaries of Software Engineering
An overview of software verification and validation, covering key concepts, testing purposes, processes, and classification of testing techniques. It highlights the importance of early testing to identify and address errors, as well as the differences between developer and independent tester perspectives. The characteristics of a "good" test, including the objectives, criteria, and constraints. It also outlines the major testing activities, including planning, execution, analysis, and feedback. Additionally, the document presents various types of testing questions, such as basic, technique-related, and management-focused. The content covers both white-box and black-box testing approaches, providing a comprehensive understanding of software testing methodologies.
Typology: Summaries
2021/2022
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SE-
Software
Verification &
Validation
Lecture: 03
Sequence [ Todays Agenda ]
Content of Lecture
- Concepts, Issues
- Testing Purpose
- Testing Processes, Activities and
Context
- Classification of Testing Techniques
Basic Concept
Lessons
- (^) Many errors are made in the early phases
- (^) These errors are discovered late
- (^) Repairing those errors is costly
It pays off to start testing real early
Software Testing
Testing is the process of exercising a program with theTesting is the process of exercising a program with the
specific intent of finding errors prior to delivery to the end specific intent of finding errors prior to delivery to the end
user. user.
errors errors
requirements conformance requirements conformance
performance performance
an indication an indication
of quality of quality
Who Tests the Software?
developer developer independent testerindependent tester
Understands the system Understands the system but, will test "gently" but, will test "gently" and, is driven by " and, is driven by " deliverydelivery "" Must learn about the system, Must learn about the system, but, will attempt to but, will attempt to breakbreak (^) itit and, is driven by and, is driven by (^) qualityquality
What is a “Good” Test?
- (^) a high probability of finding an error
- (^) not redundant.
- (^) neither too simple nor too complex OBJECTIVE: OBJECTIVE: CRITERIA: CRITERIA: CONSTRAINT: CONSTRAINT: to uncover errors to uncover errors in a complete manner in a complete manner with a minimum of effort and time with a minimum of effort and time
Testing Activities
Questions about Testing
- (^) Basic Questions
- (^) Testing Technique questions
- (^) Activity/Management Questions.
16 Software Testing
White-Box Testing White-Box Testing
... our goal is to ensure that ... our goal is to ensure that allall statements and conditions statements and conditions (^) havehave been executed at least been executed at least onceonce ...... Black-Box Black-Box TestingTesting requirementsrequirements events events input input output output
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