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var R = require('../source');var eq = require('./shared/eq');var listXf = require('./helpers/listXf');var _curry2 = require('../source/internal/_curry2');

describe('tap', function() {  var pushToList = _curry2(function(lst, x) { lst.push(x); });
  it('returns a function that always returns its argument', function() {    var f = R.tap(R.identity);    eq(typeof f, 'function');    eq(f(100), 100);    eq(f(undefined), undefined);    eq(f(null), null);  });
  it("may take a function as the first argument that executes with tap's argument", function() {    var sideEffect = 0;    eq(sideEffect, 0);    var rv = R.tap(function(x) { sideEffect = 'string ' + x; }, 200);    eq(rv, 200);    eq(sideEffect, 'string 200');  });
  it('can act as a transducer', function() {    var sideEffect = [];    var numbers = [1,2,3,4,5];
    var xf = R.compose(R.map(R.identity), R.tap(pushToList(sideEffect)));
    eq(R.into([], xf, numbers), numbers);    eq(sideEffect, numbers);  });
  it('dispatches to transformer objects', function() {    var sideEffect = [];    var pushToSideEffect = pushToList(sideEffect);
    eq(R.tap(pushToSideEffect, listXf), {      f: pushToSideEffect,      xf: listXf    });  });});