Suppose I have an `index.ts` that will import `Database.ts` and run some queries. To test this `index.ts` file, I want to mock the `Database.ts` because I don't want to connect to any real database.

This is my `index.ts`:

```
import { connect } from './Database'

export async function runSomeQuery() {
  const connection = await connect()
  const result = await connection.query('SOME QUERY')
  return result
}

```

and here is the mock of database (`__mocks__/Database.ts`)

```
const mockConnection = {
  query: jest.fn()
}

export const connect = jest.fn(
  () => Promise.resolve(mockConnection)
)

export function __getMockConnection() {
  return mockConnection
}

```

you can see that I expose a `__getMockConnection` so that I can get the `mockConnection` in my tests (`index.spec.ts`) (this pattern is learnt from the [official doc](https://jestjs.io/docs/en/manual-mocks)):

```
import { connect, __getMockConnection } from '../Database'
//                ^^^^ getting type error here 
import { runSomeQuery } from '../index'

jest.mock('../Database')

test('runSomeQuery', async () => {
  await runSomeQuery()
  const mockConnection = __getMockConnection()
  expect(connect).toBeCalled()
  expect(mockConnection.query).toBeCalledWith('SOME QUERY')
  expect(mockConnection.query).toBeCalledWith('SOME QUERY')
})

```

The test case does pass as expected, but I'm getting this TypeScript error 

```
Module '"/project/path/Database"' has no exported member '__getMockConnection'. [2305]

```

TypeScript doesn't know that I'm importing `Database` from the mock. Also for this reason I have to disable the diagnostics of ts-jest which complains the same issue.

How can I solve this? Change the import path to `'../__mocks__/Database'` doesn't work.

Here is the repo: <https://github.com/CodinCat/ts-jest-mock-issue>

Open `__tests__/index.spec.ts` with an editor that supports TypeScript like VS Code and you will see the error.