IB Computer Science Topic B.1.6 Effectiveness of Test Cases Revision Notes (SL/HL)

IB Computer Science Topic B.1.6 Effectiveness of Test Cases Revision Notes (SL/HL) | RevisionDojo

It is important to know that even the most sophisticated testing tools are useless if the test cases themselves are poorly designed.
A test case is only as effective as its ability to uncover defects and validate the software's functionality.

What Makes a Test Case Effective

Coverage

Does the test case cover all possible scenarios?
1. Effective test cases should address:
  1. Normal conditions: Typical use cases.
  2. Edge cases: Extreme or boundary values.
  3. Error conditions: Invalid inputs or unexpected situations.

Example

For a login system, test cases should include:
- Valid username and password.
- Invalid username.
- Invalid password.
- Empty fields.
- SQL injection attempts.

Clarity

Is the test case easy to understand and execute?
1. A well-written test case should include:
  1. Clear instructions: Steps to reproduce the scenario.
  2. Expected results: Precise outcomes to compare against actual results.

Example

Test Case:
- "Enter a valid username and password, then click 'Login.'
- The user should be redirected to the dashboard."

Reusability

Can the test case be reused for future testing?

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

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Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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It is important to know that even the most sophisticated testing tools are useless if the test cases themselves are poorly designed.
A test case is only as effective as its ability to uncover defects and validate the software's functionality.

What Makes a Test Case Effective

Coverage

Does the test case cover all possible scenarios?
1. Effective test cases should address:
  1. Normal conditions: Typical use cases.
  2. Edge cases: Extreme or boundary values.
  3. Error conditions: Invalid inputs or unexpected situations.

Example

For a login system, test cases should include:
- Valid username and password.
- Invalid username.
- Invalid password.
- Empty fields.
- SQL injection attempts.

Clarity

Is the test case easy to understand and execute?
1. A well-written test case should include:
  1. Clear instructions: Steps to reproduce the scenario.
  2. Expected results: Precise outcomes to compare against actual results.

Example

Test Case:
- "Enter a valid username and password, then click 'Login.'
- The user should be redirected to the dashboard."

Reusability

Can the test case be reused for future testing?

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

IB Computer Science B.1.6 Effectiveness of Test Cases Notes

What Makes a Test Case Effective

Coverage

Clarity

Reusability

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

What Makes a Test Case Effective

Coverage

Clarity

Reusability

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics