action stub
In software testing, a placeholder that simulates an action or behavior, often used in place of a real implementation.
In testing, an action stub is sometimes used instead of the actual processing.
A more general term for a stub in computing; 動作記述部 specifically refers to an action stub that simulates behavior.
Compound of 動作 (action) + 記述 (description) + 部 (part/section), a technical term likely coined in software engineering contexts.