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var R = require('../source');var eq = require('./shared/eq');var Maybe = require('./shared/Maybe');

var addN = function() {  return R.reduce(function(a, b) { return a + b; }, 0, arguments);};var add3 = R.curry(function add3(a, b, c) {  return a + b + c;});

describe('liftN', function() {
  var addN3 = R.liftN(3, addN);  var addN4 = R.liftN(4, addN);  var addN5 = R.liftN(5, addN);
  it('returns a function', function() {    eq(typeof R.liftN(3, add3), 'function');  });
  it('limits a variadic function to the specified arity', function() {    eq(addN3([1, 10], [2], [3]), [6, 15]);  });
  it('can lift functions of any arity', function() {    eq(addN3([1, 10], [2], [3]), [6, 15]);    eq(addN4([1, 10], [2], [3], [40]), [46, 55]);    eq(addN5([1, 10], [2], [3], [40], [500, 1000]), [546, 1046, 555, 1055]);  });
  it('works with other functors such as "Maybe"', function() {    var addM = R.liftN(2, R.add);    eq(addM(Maybe.Just(3), Maybe.Just(5)), Maybe.Just(8));  });
  it('interprets [a] as a functor', function() {    eq(addN3([1, 2, 3], [10, 20], [100, 200, 300]), [111, 211, 311, 121, 221, 321, 112, 212, 312, 122, 222, 322, 113, 213, 313, 123, 223, 323]);    eq(addN3([1], [2], [3]), [6]);    eq(addN3([1, 2], [10, 20], [100, 200]), [111, 211, 121, 221, 112, 212, 122, 222]);  });
  it('interprets ((->) r) as a functor', function() {    var convergedOnInt = addN3(R.add(2), R.multiply(3), R.subtract(4));    var convergedOnBool = R.liftN(2, R.and)(R.gt(R.__, 0), R.lt(R.__, 3));    eq(typeof convergedOnInt, 'function');    eq(typeof convergedOnBool, 'function');    eq(convergedOnInt(10), (10 + 2) + (10 * 3) + (4 - 10));    // jscs:disable disallowYodaConditions    eq(convergedOnBool(0), (0 > 0) && (0 < 3));    eq(convergedOnBool(1), (1 > 0) && (1 < 3));    eq(convergedOnBool(2), (2 > 0) && (2 < 3));    eq(convergedOnBool(3), (3 > 0) && (3 < 3));    // jscs:enable disallowYodaConditions  });
});