Duplicated Code

Definition:

• If you have duplicated code in tests, it makes it harder to refactor the implementation code because you have a disproportionate number of tests to update. Tests should help you refactor with confidence, rather than be a large burden that impedes your work on the code being tested.

Code Example:

assertEqual('Joe', person.getFirstName())
assertEqual('Bloggs', person.getLastName())
assertEqual(23, person.getAge())

References:

Quality attributes

• - Code Example

• - Cause and Effect

• - Frequency

• - Refactoring

• A Refactoring Tool for TTCN-3

• An Empirical Study into the Relationship Between Class Features and Test Smells

• Is duplicated code more tolerable in unit tests?

• Test Smell Detection Tools: A Systematic Mapping Study

• TestQ: Exploring Structural and Maintenance Characteristics of Unit Test Suites

• What We Know About Smells in Software Test Code

• Writing good gherkin