T11 - JUnit

Question 1

Explain what is to Valid Software

Answer 1

AIM: Check specification against user needs, Validation occurs at multiple stages
• User needs against use case diagram and system execution
• Check GUI design (looking at different Dialogs (GUI elements))

Question 2

Explain what is to verify software

Answer 2

AIM: Check whether the system is working properly and meeting specifications
• Verify the code
• Verify using test cases

Question 3

Where the different Level of testing

Answer 3

Level of testing Level 1
> Black and White box testing
Level 2 (Alpha Phrase): Program is used within a simulated environment
o Checking for differences between expected and actual output
o Checking input boundaries
Level 3 (Beta Phrase): Program is used within a real environment
o Checking for performance issues (response and execution times)
o Checking for reliability (recovery from errors).
o Handling of large data

Question 4

Explain what is Black box testing

Answer 4

To test the external behaviour and test the performance of the software

Question 5

Explain what is white box testing

Answer 5

To test the internal behaviour and test the quality of construction
Using Test Cases
> Test Cases are built around the code
> Test are built around stakeholder requirements

Question 6

Explain what is Unit testing

Answer 6

To test an individual class (isolated from other classes)

Question 7

Explain what is integration testing

Answer 7

Integration testing AIM: To test a group of classes. Grouped based on a diagram
o Use case requires multiple classes
o Sequence diagram
o Data management: Classes that uses the same application

Question 8

Explain what is Sub system testing

Answer 8

Sub - system: Testing USE CASES (each use case can have multiple classes) that share the same persistent data

Question 9

Explain what is System testing /regression testing

Answer 9

System Testing (regression testing): Any significant changes will require the test to be re-run to ensure no functionality is broken

Question 10

Identify and explain the different elements of creating a test case

Answer 10

GOAL: Description of the situation
CONTEXT: The state or situation that must be setup before the testing
PROBE: Execute the test case
PREDICTION: Expected output
ACTUAL: Actual output

Question 11

Explain the process of a test driven development and benefit to coders

Answer 11

AIM: application code is written in response to test code
> test cases are built using requirement analysis
> test cases are built before coding