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x/rambda/source/propIs.spec.js

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selfrefactor/rambda
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import {propIs} from './propIs'
const obj = {a: 1, b:'foo'}
test('when true', () => {  expect(propIs(Number, 'a', obj)).toBeTrue()  expect(propIs(String, 'b', obj)).toBeTrue()})
test('when false', () => {  expect(propIs(String, 'a', obj)).toBeFalse()  expect(propIs(Number, 'b', obj)).toBeFalse()})