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

describe('ifElse', function() {  var t = function(a) { return a + 1; };  var identity = function(a) { return a; };  var isArray = function(a) { return Object.prototype.toString.call(a) === '[object Array]'; };
  it('calls the truth case function if the validator returns a truthy value', function() {    var v = function(a) { return typeof a === 'number'; };    eq(R.ifElse(v, t, identity)(10), 11);  });
  it('calls the false case function if the validator returns a falsy value', function() {    var v = function(a) { return typeof a === 'number'; };    eq(R.ifElse(v, t, identity)('hello'), 'hello');  });
  it('calls the true case on array items and the false case on non array items', function() {    var list = [[1, 2, 3, 4, 5], 10, [0, 1], 15];    var arrayToLength = R.map(R.ifElse(isArray, R.prop('length'), identity));    eq(arrayToLength(list), [5, 10, 2, 15]);  });
  it('passes the arguments to the true case function', function() {    var v = function() { return true; };    var onTrue = function(a, b) {      eq(a, 123);      eq(b, 'abc');    };    R.ifElse(v, onTrue, identity)(123, 'abc');  });
  it('passes the arguments to the false case function', function() {    var v = function() { return false; };    var onFalse = function(a, b) {      eq(a, 123);      eq(b, 'abc');    };    R.ifElse(v, identity, onFalse)(123, 'abc');  });
  it('returns a function whose arity equals the max arity of the three arguments to `ifElse`', function() {    function a0() { return 0; }    function a1(x) { return x; }    function a2(x, y) { return x + y; }
    eq(R.ifElse(a0, a1, a2).length, 2);    eq(R.ifElse(a0, a2, a1).length, 2);    eq(R.ifElse(a1, a0, a2).length, 2);    eq(R.ifElse(a1, a2, a0).length, 2);    eq(R.ifElse(a2, a0, a1).length, 2);    eq(R.ifElse(a2, a1, a0).length, 2);  });
  it('returns a curried function', function() {    var v = function(a) { return typeof a === 'number'; };    var ifIsNumber = R.ifElse(v);    eq(ifIsNumber(t, identity)(15), 16);    eq(ifIsNumber(t, identity)('hello'), 'hello');
    var fn = R.ifElse(R.gt, R.subtract, R.add);    eq(fn(2)(7), 9);    eq(fn(2, 7), 9);    eq(fn(7)(2), 5);    eq(fn(7, 2), 5);  });
});