The Butterfly ^^^^^ **Definition:** * You have to test something which contains data that changes all the time, like a structure which contains the current date, and there is no way to nail the result down to a fixed value. The ugly part is that you don't care about this value at all. It just makes your test more complicated without adding any value. **Also Known As:** * Sensitive Equality **References:** .. admonition:: Quality attributes * :octicon:`file-code;1em` - Code Example * :octicon:`comment-discussion;1em` - Cause and Effect * :octicon:`graph;1em` - Frequency * :octicon:`sync;1em` - Refactoring * `Unit testing Anti-patterns catalogue `_