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Some libraries like Ora have set their module.exports to a function.

Testing libraries like Sinon rely on having an object to stub on, for example:

const stub = sinon.stub(obj, 'method');

If there is no object you can't stub the function, which makes libraries like Ora 'unstubable' out of the box. There is a certain frustration about it with no clear solution.


One possible solution for the problem is to create a proxy module with cache to allow stubbing.

Import it in your code const lib = patch('lib'); and use cache object in your tests.

The obvious downside is that you have to import your libs like const lib = patch('lib');

Would love to find a better approach. If know one please let me know.