WIP: Try add anothor tests

[tamakiii]

• Import not transpile with babel-jest

  • Import not transpile with babel-jest jestjs/jest#3202

• https://github.com/kentcdodds/how-jest-mocking-works

• https://deltice.github.io/jest/docs/en/webpack.html#content

[tamakiii]

❯ yarn jest --watchAll
 PASS  modules/bbb/__tests__/index.js
 PASS  src/sum.test.js
 FAIL  modules/aaa/__tests__/index.js
  ● Test suite failed to run

    Cannot find module '../config/index.js' from 'index.js'

      1 | 'use strict';
      2 |
    > 3 | import config from '../config/index.js';
        | ^
      4 |
      5 | function doit(directory) {
      6 |       return 'aaa:' + config.type;

      at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:221:17)
      at Object.<anonymous> (modules/aaa/src/index.js:3:1)

 PASS  __tests__/FileSummarizer-test.js

Test Suites: 1 failed, 3 passed, 4 total
Tests:       3 passed, 3 total
Snapshots:   0 total
Time:        2.466s
Ran all test suites.

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[tamakiii]

🤔

 FAIL  modules/aaa/__tests__/a.test.js
  ● aaa › aaa

    expect(received).toBe(expected) // Object.is equality

    Expected: "a < type is: mocked A"
    Received: "a < type is: A"

       7 | describe('aaa', () => {
       8 |   test('aaa', () => {
    >  9 |     expect(doit()).toBe('a < type is: mocked A')
         |                    ^
      10 |   });
      11 | });
      12 |

      at Object.toBe (modules/aaa/__tests__/a.test.js:9:20)

 PASS  __tests__/FileSummarizer-test.js
 PASS  src/sum.test.js
 FAIL  modules/bbb/__tests__/b.test.js
  ● bbb › bbb

    expect(received).toBe(expected) // Object.is equality

    Expected: "b < name is: mocked B"
    Received: "b < name is: B"

       7 | describe('bbb', () => {
       8 |   test('bbb', () => {
    >  9 |     expect(doit()).toBe('b < name is: mocked B')
         |                    ^
      10 |   });
      11 | });
      12 |

      at Object.toBe (modules/bbb/__tests__/b.test.js:9:20)

Test Suites: 2 failed, 2 passed, 4 total
Tests:       2 failed, 2 passed, 4 total
Snapshots:   0 total
Time:        2.585s
Ran all test suites.

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