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