123456789101112131415161718192021222324252627282930313233343536373839404142434445
import {assoc} from './assoc'import {lens} from './lens'import {lensIndex} from './lensIndex'import {lensPath} from './lensPath'import {prop} from './prop'import {set} from './set'
const testObject = {  foo: 'bar',  baz: {    a: 'x',    b: 'y',  },}
test('assoc lens', () => {  const assocLens = lens(prop('foo'), assoc('foo'))  const result = set(assocLens, 'FOO', testObject)  const expected = {    ...testObject,    foo: 'FOO',  }  expect(result).toEqual(expected)})
test('path lens', () => {  const pathLens = lensPath('baz.a')  const result = set(pathLens, 'z', testObject)  const expected = {    ...testObject,    baz: {      a: 'z',      b: 'y',    },  }  expect(result).toEqual(expected)})
test('index lens', () => {  const indexLens = lensIndex(0)
  const result = set(indexLens, 3, [1, 2])  expect(result).toEqual([3, 2])})