import {apply} from './apply'import {unapply} from './unapply'import {identity} from './identity'import {converge} from './converge'import {prop} from './prop'import {sum} from './sum'
test('happy', () => { const fn = unapply(identity) expect(fn(1, 2, 3)).toEqual([1, 2, 3]) expect(fn()).toEqual([])})
test('returns a function which is always passed one argument', function () { const fn = unapply(function () { return arguments.length }) expect(fn('x')).toEqual(1) expect(fn('x', 'y')).toEqual(1) expect(fn('x', 'y', 'z')).toEqual(1)})
test('forwards arguments to decorated function as an array', function () { const fn = unapply(function (xs) { return '[' + xs + ']' }) expect(fn(2)).toEqual('[2]') expect(fn(2, 4)).toEqual('[2,4]') expect(fn(2, 4, 6)).toEqual('[2,4,6]')})
test('returns a function with length 0', function () { const fn = unapply(identity) expect(fn.length).toEqual(0)})
test('is the inverse of R.apply', function () { let a, b, c, d, e, f, g, n const rand = function () { return Math.floor(200 * Math.random()) - 100 }
f = Math.max g = unapply(apply(f)) n = 1 while (n <= 100) { a = rand() b = rand() c = rand() d = rand() e = rand() expect(f(a, b, c, d, e)).toEqual(g(a, b, c, d, e)) n += 1 }
f = function (xs) { return '[' + xs + ']' } g = apply(unapply(f)) n = 1 while (n <= 100) { a = rand() b = rand() c = rand() d = rand() e = rand() expect(f([a, b, c, d, e])).toEqual(g([a, b, c, d, e])) n += 1 }})
test('it works with converge', () => { const fn = unapply(sum) const convergeFn = converge(fn, [prop('a'), prop('b'), prop('c')]) const obj = { a: 1337, b: 42, c: 1, } const expected = 1337 + 42 + 1 expect(convergeFn(obj)).toEqual(expected)})