How to export function from module without nodeunit testing it?

I've got a few tests scattered throughout multiple files.

Currently I just run `nodeunit .`, nodeunit then tests them all successfully. Great!

But I want to export a function from one of my files so that another can call it. The problem is that when I run `nodeunit .` that function now gets called.

How can I run tests on all files? I'm used to python's `nose` library, which only tests functions that have `test` in the function name.

Do I need to move all tests into a seperate file to the functionality? I don't want to do that. I like putting tests adjacent to the code they're testing.

Empieza leyendo el comportamiento de nodeunit al descubrir pruebas y cargar módulos en torno al comando `nodeunit .`; el issue no especifica archivos fuente ni pruebas. Compara cómo se tratan las funciones exportadas con la disposición deseada de pruebas adyacentes. Se considera terminado cuando todas las pruebas previstas siguen ejecutándose sin invocar funciones auxiliares exportadas para su reutilización.

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