[Docs] Document new methods like jest.resetModuleRegistry

[ide]

@cpojer if you don't have time for this could you list out the new functions in 0.7 and label this issue as "help wanted"?

[cpojer]

There are no new APIs in 0.7. I removed APIs that were undocumented in open source and never should have been open sourced in the first place. jest.resetModuleRegistry() is being called implicitly before each test run. It simply wipes away the module registry for all modules and has been around forever. It was previously called require('mock-modules').dumpCache().

[cpojer]

Also, the reason I'm doing this is to

• refactor jest into a codebase that a human can understand and read
• replace node-haste in the future

[ide]

Oh ok. I just remembered that a lot of tests called dumpCache() and thought that resetModuleRegistry() was a public API.

[cpojer]

Yeah, it is a public API because there exists a config option to disable the reset, mainly for the react/relay open source projects. I'm hoping to kill this option and also to completely revamp configs (+ have some sort of legacy-options converter or something).

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