This is not an apt analogy at all. You don't recompile your editor to get type errors. The question is type checking vs unit tests. If your text editor can type

This is not an apt analogy at all. You don't recompile your editor to get type errors. The question is type checking vs unit tests. If your text editor can type check as you type, the feedback loop is much tighter than recompiling and rerunning and possibly modifying handwritten unit tests.