Can somebody help me with manual mocking in Jest, please? :)
I try to have Jest use the mock instead of the actual module.

my test: 

```
// __tests__/mockTest.js

import ModuleA from "../src/ModuleA"

describe("ModuleA", () => {
    beforeEach(() => {
        jest.mock("../src/ModuleA")
    })

    it("should return the mock name", () => {
        const name = ModuleA.getModuleName()
        expect(name).toBe("mockModuleA")
    })
})

```

my code:

```
// src/ModuleA.js
export default {
    getModuleName: () => "moduleA"
}

// src/__mocks__/ModuleA.js
export default {
    getModuleName: () => "mockModuleA"
}

```

I think I followed everything the [documentation](https://facebook.github.io/jest/docs/en/manual-mocks.html) says about manual mocks, but perhaps I'm overlooking something here?
This is my result:

```
Expected value to be:
      "mockModuleA"
Received:
      "moduleA"

```