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import { T, always } from 'rambdax'import { pickBy } from './pickBy'
var obj = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6}
it('creates a copy of the object', () => {  expect(pickBy(always(true), obj)).not.toBe(obj)})
it('when returning truthy, keeps the key', () => {  expect(pickBy(T, obj)).toEqual(obj)  expect(pickBy(always({}), obj)).toEqual(obj)  expect(pickBy(always(1), obj)).toEqual(obj)})
it('when returning falsy, keeps the key', () => {  expect(pickBy(always(false), obj)).toEqual({})  expect(pickBy(always(0), obj)).toEqual({})  expect(pickBy(always(null), obj)).toEqual({})})
it('is called with (val,key,obj)', () => {  expect(    pickBy((val, key, _obj) => {      expect(_obj).toBe(obj)      return key === 'd' && val === 4    }, obj)  ).toEqual({d: 4})})