12345678910111213141516171819202122232425
var R = require('../source');var eq = require('./shared/eq');

describe('union', function() {  var M = [1, 2, 3, 4];  var N = [3, 4, 5, 6];  it('combines two lists into the set of all their elements', function() {    eq(R.union(M, N), [1, 2, 3, 4, 5, 6]);  });
  it('has R.equals semantics', function() {    function Just(x) { this.value = x; }    Just.prototype.equals = function(x) {      return x instanceof Just && R.equals(x.value, this.value);    };
    eq(R.union([0], [-0]).length, 2);    eq(R.union([-0], [0]).length, 2);    eq(R.union([NaN], [NaN]).length, 1);    eq(R.union([new Just([42])], [new Just([42])]).length, 1);  });
});