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var listXf = require('./helpers/listXf');
var R = require('../source');var assert = require('assert');var eq = require('./shared/eq');var Id = require('./shared/Id');
describe('map', function() {  var times2 = function(x) {return x * 2;};  var add1 = function(x) {return x + 1;};  var dec = function(x) { return x - 1; };  var intoArray = R.into([]);
  it('maps simple functions over arrays', function() {    eq(R.map(times2, [1, 2, 3, 4]), [2, 4, 6, 8]);  });
  it('maps simple functions into arrays', function() {    eq(intoArray(R.map(times2), [1, 2, 3, 4]), [2, 4, 6, 8]);  });
  it('maps over objects', function() {    eq(R.map(dec, {}), {});    eq(R.map(dec, {x: 4, y: 5, z: 6}), {x: 3, y: 4, z: 5});  });
  it('interprets ((->) r) as a functor', function() {    var f = function(a) { return a - 1; };    var g = function(b) { return b * 2; };    var h = R.map(f, g);    eq(h(10), (10 * 2) - 1);  });
  it('dispatches to objects that implement `map`', function() {    var obj = {x: 100, map: function(f) { return f(this.x); }};    eq(R.map(add1, obj), 101);  });
  it('dispatches to transformer objects', function() {    eq(R.map(add1, listXf), {      f: add1,      xf: listXf    });  });
  it('throws a TypeError on null and undefined', function() {    assert.throws(function() { return R.map(times2, null); }, TypeError);    assert.throws(function() { return R.map(times2, undefined); }, TypeError);  });
  it('composes', function() {    var mdouble = R.map(times2);    var mdec = R.map(dec);    eq(mdec(mdouble([10, 20, 30])), [19, 39, 59]);  });
  it('can compose transducer-style', function() {    var mdouble = R.map(times2);    var mdec = R.map(dec);    var xcomp = mdec(mdouble(listXf));    eq(xcomp.xf, {xf: listXf, f: times2});    eq(xcomp.f, dec);  });
  it('correctly uses fantasy-land implementations', function() {
    var m1 = Id(1);    var m2 = R.map(R.add(1), m1);
    eq(m1.value + 1, m2.value);  });
});