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x/rambda/source/isEmpty.spec.js

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import { isEmpty } from './isEmpty.js'
test('happy', () => {  expect(isEmpty(undefined)).toBeFalse()  expect(isEmpty('')).toBeTrue()  expect(isEmpty(null)).toBeFalse()  expect(isEmpty(' ')).toBeFalse()  expect(isEmpty(new RegExp(''))).toBeFalse()  expect(isEmpty([])).toBeTrue()  expect(isEmpty([ [] ])).toBeFalse()  expect(isEmpty({})).toBeTrue()  expect(isEmpty({ x : 0 })).toBeFalse()  expect(isEmpty(0)).toBeFalse()  expect(isEmpty(NaN)).toBeFalse()  expect(isEmpty([ '' ])).toBeFalse()  expect(isEmpty({ isEmpty: false})).toBeFalse()  expect(isEmpty({ isEmpty: () => false})).toBeFalse()  expect(isEmpty({ isEmpty: true})).toBeTrue()  expect(isEmpty({ isEmpty: () => true})).toBeTrue()})