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

describe('empty', function() {
  it('dispatches to `empty` method', function() {    function Nothing() {}    Nothing.prototype.empty = function() { return new Nothing(); };
    function Just(x) { this.value = x; }    Just.prototype.empty = function() { return new Nothing(); };
    eq(R.empty(new Nothing()).constructor, Nothing);    eq(R.empty(new Just(123)).constructor, Nothing);  });
  it('dispatches to `empty` function on constructor', function() {    function Nothing() {}    Nothing.empty = function() { return new Nothing(); };
    function Just(x) { this.value = x; }    Just.empty = function() { return new Nothing(); };
    eq(R.empty(new Nothing()).constructor, Nothing);    eq(R.empty(new Just(123)).constructor, Nothing);  });
  it('returns empty array given array', function() {    eq(R.empty([1, 2, 3]), []);  });
  it('returns empty typed array of equivalent type given typed array', function() {    eq(R.empty(Uint8Array.from('123')), Uint8Array.from(''));    eq(R.empty(Uint8Array.from('123')).constructor.name, 'Uint8Array');    eq(R.empty(new Float32Array([1, 2, 3])), new Float32Array([]));    eq(R.empty(new Float32Array([1, 2, 3])).constructor.name, 'Float32Array');  });
  it('returns empty object given object', function() {    eq(R.empty({x: 1, y: 2}), {});  });
  it('returns empty string given string', function() {    eq(R.empty('abc'), '');    eq(R.empty(new String('abc')), '');  });
  it('returns empty arguments object given arguments object', function() {    var x = (function() { return arguments; }(1, 2, 3));    eq(R.empty(x), (function() { return arguments; }()));  });
});