import assert from 'assert';
import lodashStable from 'lodash';
import unionWith from '../unionWith.js';

describe('unionWith', function() {
  it('should work with a `comparator`', function() {
    var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }],
        others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }],
        actual = unionWith(objects, others, lodashStable.isEqual);

    assert.deepStrictEqual(actual, [objects[0], objects[1], others[0]]);
  });

  it('should output values from the first possible array', function() {
    var objects = [{ 'x': 1, 'y': 1 }],
        others = [{ 'x': 1, 'y': 2 }];

    var actual = unionWith(objects, others, function(a, b) {
      return a.x == b.x;
    });

    assert.deepStrictEqual(actual, [{ 'x': 1, 'y': 1 }]);
  });
});