import assert from 'assert';
import lodashStable from 'lodash';

describe('lodash(...) methods that return new wrapped values', function() {
  var funcs = [
    'castArray',
    'concat',
    'difference',
    'differenceBy',
    'differenceWith',
    'intersection',
    'intersectionBy',
    'intersectionWith',
    'pull',
    'pullAll',
    'pullAt',
    'sampleSize',
    'shuffle',
    'slice',
    'splice',
    'split',
    'toArray',
    'union',
    'unionBy',
    'unionWith',
    'uniq',
    'uniqBy',
    'uniqWith',
    'words',
    'xor',
    'xorBy',
    'xorWith'
  ];

  lodashStable.each(funcs, function(methodName) {
    it('`_(...).' + methodName + '` should return a new wrapped value', function() {
      var value = methodName == 'split' ? 'abc' : [1, 2, 3],
          wrapped = _(value),
          actual = wrapped[methodName]();

      assert.ok(actual instanceof _);
      assert.notStrictEqual(actual, wrapped);
    });
  });
});