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

describe('uniq', function() {  it('returns a set from any array (i.e. purges duplicate elements)', function() {    var list = [1, 2, 3, 1, 2, 3, 1, 2, 3];    eq(R.uniq(list), [1, 2, 3]);  });
  it('keeps elements from the left', function() {    eq(R.uniq([1, 2, 3, 4, 1]), [1, 2, 3, 4]);  });
  it('returns an empty array for an empty array', function() {    eq(R.uniq([]), []);  });
  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.uniq([-0, -0]).length, 1);    eq(R.uniq([0, -0]).length, 2);    eq(R.uniq([NaN, NaN]).length, 1);    eq(R.uniq([[1], [1]]).length, 1);    eq(R.uniq([new Just([42]), new Just([42])]).length, 1);  });
  it('handles null and undefined elements', function() {    eq(R.uniq([void 0, null, void 0, null]), [void 0, null]);  });
  it('uses reference equality for functions', function() {    eq(R.uniq([R.add, R.identity, R.add, R.identity, R.add, R.identity]).length, 2);  });
});