Code Quality Metrics
Code quality metrics help ensure the maintainability, reliability, and robustness of your software.
1. Code Coverage
Description: Code coverage measures the percentage of your code that is executed by automated tests.
Formula:
Code Coverage = (Number of lines covered by tests / Total number of lines) * 100%
Additional Information:
- High code coverage indicates thorough testing.
- It helps identify untested code areas.
- Different types of coverage (line, branch, etc.) exist.
2. Cyclomatic Complexity
Description: Cyclomatic complexity measures the complexity of a program’s control flow.
Formula:
Cyclomatic Complexity = E - N + 2P (E = edges, N = nodes, P = connected components)
Additional Information:
- High complexity can lead to difficult-to-maintain code.
- It helps identify code that needs refactoring.
- Tools like SonarQube can calculate this.
3. Code Duplication
Description: Code duplication measures the amount of identical or near-identical code in your codebase.
Formula:
- Calculated by tools that identify duplicated code blocks.
Additional Information:
- Duplication increases maintenance costs.
- It can lead to inconsistencies and bugs.
- Refactoring can reduce duplication.
4. Static Code Analysis Findings
Description: Reports from static analysis tools that identify potential code issues without executing the code.
Formula:
- Varies based on the specific analysis tool.
Additional Information:
- Tools like ESLint, SonarQube, and Checkstyle are used.
- They help find bugs, security vulnerabilities, and style violations.
- They improve code quality early in the development process.
5. Maintainability Index
Description: A calculated value representing how easy it is to maintain code.
Formula:
- Calculated by static analysis tools based on various factors.
Additional Information:
- Higher index values indicate better maintainability.
- It helps prioritize refactoring efforts.
- It can be used to track maintainability over time.