While production code quality is important for keeping a constant development velocity, test code quality is so as well. Tests, however, are mostly not treated in the same way. Experience shows that enterprise projects rarely invest time and effort into refactoring tests.
In general the same practices for high code quality apply for test code as they do for live code. Certain principles are especially important for tests.
First of all, the DRY principle certainly has its importance. On code level this means to avoid repeating definitions, test procedures, and code duplication that contains just minor differences.
For test data, the same principle applies. Experience shows that multiple test case scenarios that use similar ...
