Lecture 2: Use Cases, Base Testing and Domain Analysis

Question 1

What is Use Case modelling?

Answer 1

Model a system requirements by representing the interaction between the actor and the system

Question 2

What does Use cases contain?

Answer 2

• System boundary
• Actors
• Use Cases

Question 3

What is Pre and post conditions?

Answer 3

Are constraints that define what can and can’t be done

Question 4

What is Actor generalisation?

Answer 4

If two or more actors communicate with the same set of use cases, you would generalise and to simplify the model

Question 5

What is a include and extend use case?

Answer 5

Are base cases

Question 6

What is <<include>>?</include>

Answer 6

Include is used when a use case shares the common behaviour

Question 7

What is <<extend>>?</extend>

Answer 7

The extension use case inserts a new behaviour into the base use case

Question 8

What does use-case testing do?

Answer 8

• How a user interacts with the system to ensure the system responds appropriately.
• Tests a collection of features based on the system’s use case

Question 9

What is use case testing made up of?

Answer 9

Test cases are use case scenarios with concrete data

Question 10

What are test cases NOT suppose to provide?

Answer 10

• Test cases MUST provide the data used in the test

Question 11

What must you do after the test case?

Answer 11

Record observations by stating how the system has changed

Question 12

What do use cases define?

Answer 12

• User acceptance testing
• Complying with requirements

Question 13

What do test cases define?

Answer 13

• The data satisfies the preconditions to be tested
• Data comes from actor/tester

Question 14

What are the Fundamentals of Object Orientation?

Answer 14

• Objects
- Encapsulation
- Messages
• Classes

Question 15

What are the methods of analysis?

Answer 15

Verb and Noun analysis (Problem domain)
CRC (Class, Responsibilities and Collaborators)

Question 16

What is CRC?

Answer 16

Stands for: Class, Responsibilities and Collaborators

• A brainstorming technique used to define the problem domain to model object-oriented using sticky notes!!
• To identify the classes or attributes

Question 17

What is ‘Responsibility’ in CRC?

Answer 17

• Knowing what the class does the attributes/relationships
• Doing: execution of operations

Question 18

What is ‘Collaborators’ in CRC?

Answer 18

Identifies the collaborators of a class for each responsibility: “Does the class have the ability to fulfil the responsibility?”

Question 19

What is Robustness Analysis?

Answer 19

• First-guess at analysing the classes of objects to participate in the use case
• Ideas about the user interface

Question 20

What are the 3 Sterotypes?

Answer 20

• Boundary
• Entity
• Control

Question 21

What is a Boundary Class?

Answer 21

Boundary class: Is an interface (GUI) object that communicates with actors externally

(User/System/Device)

Question 22

What is a Entity class?

Answer 22

Objects from the domain model
- Persistent data .i.e. Address

Question 23

What is a Control class?

Answer 23

Is an application logic and the glue together the user interface and entity class

Question 24

What is Robustness analysis notation?

Answer 24

Sterotypes such as <<boundary>> extend the UML meta_model by introducing new modelling elements</boundary>

• They have their own icon
• They are one of the UML extensibility mechanism** **

Question 25

Complete this diagram

Answer 25

Question 26

When analysing the use case specification for NOUNS, what must you check?

Answer 26

Nouns, the system must keep information about it indicated an entity class

Question 27

Some nouns may indicate what classes?

Answer 27

• Some nouns>attributes between classes
• Some Nouns>relationship between classes
• The noun may describe an actor interacts with it which indicate the boundary class

Question 28

What does a verb describe when analysing a use case specification?

Answer 28

When describing the things the system does, >

controller class

Question 29

What does a Noun describe when analysing a use case specification?

Answer 29

Nouns, the system must keep information about it indicated an

entity class

Question 30

Some verbs indicate what between classes?

Answer 30

• *Relationship** > between classes
• *Operations** > of a class

Question 31

Why use colour in models? And what is the term?

Answer 31

Reducing noise and enriching the content of displays is a technique of layering and separation is called

**Visually Stratifying **

Question 32

Why is colour model so useful?

Answer 32

• The archetypes and their plug-ins form a ‘Domain neutral component’ is called a reusable component
• Multiple domain neutral components can be linked with each other to represent different complex models
• Archetypes save a lot of time
• Can be thought as “Analysis Patterns”