Allow all rewires to be reverted via rewire.reset()

[amay]

When testing in mocha, it would be nice to have a way to reset all of the injections that have been setup via __set__. Maybe something like this:

// set this up so that it will be run after ever spec
afterEach(function() {
  rewire.reset();
});

The motivation behind this is that we ran into an issue where specs would break when run solo, but not when run together, and part of the problem was that __set__ is not reverted after a single test run. We are aware of how you can manually revert by storing a reference to the function returned by __set__ and calling it after the test, but the approach mentioned above would make it a lot less error prone.

I took a crack at trying to implement this, but I lost my way when I dug in and realized we are using eval of an IIFE function to define __set__. I couldn't think of a good way of making __set__ aware of some context in the rewire module where the revert functions could be stored such that reset could just invoke all those reverts. Any tips on how we might achieve this?

[jhnns]

If you want to bring your module back to the initial state, I think it's the best to just rewire() it again. This will create a fresh instance of the module.

[amay]

Fair enough. I'll close this.

[srlowe]

I also would love to have a global rewire.reset(); calling rewuire() again is not always possible, depending on code standards.

[sheltonsuen]

I also would love to have a global rewire.reset(); calling rewuire() again is not always possible, depending on code standards.

I would like to use it within afterEach for all but seems like what I can do is revert it one by one 😂