Undergraduate Certificate in Improving Testability: Code Refactoring Techniques

The Undergraduate Certificate in Improving Testability: Code Refactoring Techniques is designed for undergraduate students and professionals in software development seeking to enhance their skills in crafting more maintainable, testable, and efficient code. The curriculum focuses on advanced code refactoring techniques that improve the structure of existing code without changing its external behavior, enabling learners to write cleaner, more maintainable code that is easier to test and debug.

Key skills and knowledge learners will develop include: understanding and applying various refactoring patterns and principles, writing unit tests and integration tests, and using static code analysis tools. Students will also learn how to refactor legacy code, improve code readability, and maintain a consistent coding style. Through hands-on projects and case studies, learners will gain practical experience in transforming complex, untestable code into a more modular, testable architecture.

This programme has a significant career impact, equipping graduates with the skills necessary to advance in technical roles, such as software developer, architect, and quality assurance specialist. The ability to refactor code to improve testability is increasingly valued in the software industry, leading to enhanced employability and the potential for higher job satisfaction and career progression.

1. 1. Introduction to Testability and Code Quality: Learners will understand the importance of testability in software development and explore foundational concepts such as code refactoring, clean code principles, and the impact of design on testability. Practical skills include identifying and improving code quality metrics.
2. 2. Unit Testing Foundations: This module covers the basics of unit testing, including test cases, test suites, and test-driven development (TDD). Learners will gain skills in writing effective unit tests and setting up a testing environment using popular testing frameworks.
3. 3. Refactoring for Testability: Learners will study various refactorings that enhance testability, such as introducing interfaces, separating concerns, and using dependency injection. Practical exercises will focus on applying these refactorings to real-world codebases.
4. 4. Advanced Refactoring Techniques: This module delves into more complex refactoring techniques, such as extracting methods, replacing methods with methods, and using design patterns to improve testability. Practical skills include refactoring large codebases to make them more testable.
5. 5. Integration Testing Strategies: Learners will learn about integration testing and its role in ensuring that components work together as expected. Practical skills include setting up integration tests, using mocks and stubs, and testing complex interactions.
6. 6. Performance Testing and Optimization: This module covers the principles of performance testing and how to optimize code for better performance. Practical skills include measuring and improving the performance of code, understanding profiling tools, and applying performance optimization techniques.
7. 7. Continuous Integration and Deployment: Learners will explore the role of continuous integration (CI) and continuous deployment (CD) in maintaining testable code. Practical skills include setting up CI/CD pipelines, automating tests, and deploying code reliably.
8. 8. Code Reviews and Collaboration: This module focuses on best practices for code reviews and collaborative development, emphasizing the importance of maintaining testable code. Practical skills include conducting effective code reviews, using version control systems, and collaborating with team members to improve code quality.
9. 9. Legacy Code Refactoring: Learners will learn how to refactor legacy code to improve its testability. Practical skills include identifying and addressing technical debt, refactoring without breaking existing functionality, and maintaining a testable codebase over time.
10. 10. Advanced Topics in Testability: This module covers advanced topics such as behavior-driven development (BDD), test doubles, and test automation frameworks. Practical skills include writing BDD scenarios, using test doubles effectively, and selecting the right automation tools for specific testing needs.