Rewiring a nested module

[cazgp]

I would like to rewire a module that sits quite far down the require hierarchy. Simply rewiring it at the top level is not enough. I then tried something like this:

# This in the top level on its own doesn't work
validate = rewire './validate'
validate.__set__ 'func', -> true

moduleD = rewire './moduleD'
moduleD.__set__ 'validate', validate

moduleC = rewire './moduleC'
moduleC.__set__ 'moduleD', moduleD

moduleB = rewire './moduleB'
moduleB.__set__ 'moduleC', moduleC

moduleA = rewire './moduleA'
moduleA.__set__ 'moduleB', moduleB

.. but the original validate function is still always called. A console.log at the top of validate shows it's being loaded twice - shouldn't it only be loaded once? Validate is required at least 5 different times in the app. I even rewired all of those modules with the rewired validate, but nothing has worked.

Is this a bug, not a feature, or user error?

[cazgp]

OK so trawling through old issues seems to have helped.

require.cache[require.resolve './validate'] = exports: validate

Any chance you could add this to the docs for future users?

[jhnns]

Sorry for the late response.

Is this a bug, not a feature, or user error?

This is a feature, because this way you have the full control. Do you want the rewired version to be in the global require cache or do you just want the rewired version to be isolated – it's up to you. Imho it would not be a good style if rewire did that for you. Then there would be issues like "Add option for global require cache"...

Any chance you could add this to the docs for future users?

I am happy about pull-requests. 😀