10 Questions
What is the main purpose of short test-driven development (TDD) cycles?
To provide rapid feedback about the code and support through refactorings
Why should a developer design the implementation with testability in mind?
To ensure that classes are easy to test
What is the first step in unit testing?
Exercising each unit
What do larger tests, such as integration tests and system tests, focus on?
Larger parts of the software system
What is the purpose of applying automated, intelligent testing tools after engineering tests using various techniques?
To look for tests that humans are not good at spotting
What does it mean for testing to be effective?
Maximizing the number of detected bugs while minimizing effort
Why is exhaustive testing impossible?
We do not have the resources to completely test our programs
What is the principle for knowing when to stop testing?
Use adequacy criteria to decide when to stop testing
What is the cost of bugs in production compared to prevention?
The cost of bugs in production often outweighs the cost of prevention
What is the aim of being systematic in testing?
For any given code, any developer should come up with the same test suite
Study Notes
TDD Cycle and Testability
- The main purpose of short TDD cycles is to ensure rapid feedback and continuous improvement in code quality.
Designing for Testability
- Developers should design implementations with testability in mind to ensure that the code can be easily tested and validated.
Unit Testing
- The first step in unit testing is to write a unit test, which is a small, self-contained piece of code that verifies the behavior of a specific unit of code.
Larger Tests
- Larger tests, such as integration tests and system tests, focus on verifying how different units of code work together to achieve a larger goal.
Automated Testing Tools
- The purpose of applying automated, intelligent testing tools after engineering tests is to increase testing efficiency and reduce the time and cost associated with manual testing.
Effective Testing
- Testing is effective when it finds defects and ensures that the code meets the required standards and specifications.
Exhaustive Testing
- Exhaustive testing is impossible because it would require testing every possible input and scenario, which is impractical and often impossible.
Stopping Criteria
- The principle for knowing when to stop testing is when the cost of finding the next defect is greater than the benefit of fixing it.
Cost of Bugs
- The cost of fixing bugs in production is significantly higher than preventing them in the first place, which emphasizes the importance of testing and quality assurance.
Systematic Testing
- The aim of being systematic in testing is to ensure that testing is thorough, consistent, and repeatable, which helps to increase confidence in the quality of the code.
Test your knowledge of the software development process, from understanding requirements to test-driven development cycles and rapid feedback.
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