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import { compose } from './compose'import { lensIndex } from './lensIndex'import { lensPath } from './lensPath'import { lensProp } from './lensProp'import { over } from './over'import { toUpper } from './toUpper'import { view } from './view'
test('composed lenses', () => {  const testObject = {    foo : [ 'a', 'b', 'c' ],    baz : {      a : 'x',      b : 'y',    },  }  const propLens = lensProp('foo')  const indexLens = lensIndex(2)  const composedLens = compose(propLens, indexLens)
  const pathLens = lensPath('baz.a')  const composedPathLens = compose(lensPath('baz'), lensPath('a'))  expect(view(composedPathLens, testObject)).toEqual(view(pathLens, testObject))
  expect(view(composedLens)(testObject)).toEqual('c')
  expect(over(    composedLens, toUpper, testObject  )).toEqual({    ...testObject,    foo : [ 'a', 'b', 'C' ],  })})