PFight/jest-ts-describe-not-defined-problem

Minimal example to reproduce error "ReferenceError: describe is not defined" in JEST + Typescript

Steps to reproduce:

1. npm i
2. npm t

Output:

    $ npm t

    > jest-describe@1.0.0 test C:\Test\jest-describe
    > jest

    FAIL test/test.test.ts
      ● Test suite failed to run

        ReferenceError: describe is not defined

        > 1 | describe('Jest', function() {
            | ^
          2 |     it('should work', function() {
          3 |         expect(true).toBe(true);
          4 |     });

          at Object.<anonymous> (test/test.test.ts:1:1)

    Test Suites: 1 failed, 1 total
    Tests:       0 total
    Snapshots:   0 total
    Time:        1.557s
    Ran all test suites.
    npm ERR! Test failed.  See above for more details.