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import {forEach} from './forEach'import {type} from './type'
test('happy', () => {  const sideEffect = {}  forEach(x => (sideEffect[`foo${x}`] = x + 10))([1, 2])
  expect(sideEffect).toEqual({    foo1: 11,    foo2: 12,  })})
test('iterate over object', () => {  const obj = {    a: 1,    b: [1, 2],    c: {d: 7},    f: 'foo',  }  const result = {}  const returned = forEach((val, prop, inputObj) => {    expect(type(inputObj)).toBe('Object')    result[prop] = `${prop}-${type(val)}`  })(obj)
  const expected = {    a: 'a-Number',    b: 'b-Array',    c: 'c-Object',    f: 'f-String',  }
  expect(result).toEqual(expected)  expect(returned).toEqual(obj)})
test('with empty list', () => {  const list = []  const result = forEach(x => x * x)(list)
  expect(result).toEqual(list)})
test('with wrong input', () => {  const list = undefined  const result = forEach(x => x * x)(list)
  expect(result).toBeUndefined()})
test('returns the input', () => {  const list = [1, 2, 3]  const result = forEach(x => x * x)(list)
  expect(result).toEqual(list)})