Mastering Unit Testing Using Mockito and JUnit

Working with test smells

Code smell is a technical debt or symptom that indicates a deeper problem. Smells are not bugs, or they don't fail tests. Instead, they indicate a problem in design or code such that a rigid code cannot be enhanced or can create a maintenance issue. This section covers the test smells that should be refactored for maintenance and readability. The following topics are covered:

• Test code duplication
• Conditions in test code
• Test logic in the production code
• Over engineering

Refactoring duplicates

Code duplication is the simplest code smell. It creates maintainability problems. The same code is written in many places; if any bug is found, then you need to modify all other places. This subsection elaborates on the duplicate code ...