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x/rambda/filterIndexed.spec.js

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import { filter } from './filter'import { filterIndexed } from './filterIndexed'
const iterator = (x, i) => { expect(x).toBeNumber() expect(i).toBeNumber()}
test('happy', () => { const list = [ 1, 2, 3 ] filterIndexed(iterator, list) filterIndexed(iterator)(list)})
test('with object', () => { const iterator = x => x + 1 const obj = { a : 1 } expect(filterIndexed(iterator, obj)).toEqual(filter(iterator, obj))})
test('with bad input', () => { expect(filterIndexed(iterator, undefined)).toEqual([])})