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import { assoc } from './assoc.js'import { lens } from './lens.js'import { prop } from './prop.js'import { view } from './view.js'
const testObject = { foo : 'Led Zeppelin' }const assocLens = lens(prop('foo'), assoc('foo'))
test('happy', () => {  expect(view(assocLens, testObject)).toBe('Led Zeppelin')})