import assert from 'assert';
import lodashStable from 'lodash';
import { LARGE_ARRAY_SIZE, square, isEven } from './utils.js';

describe('find and findLast', function() {
  lodashStable.each(['find', 'findLast'], function(methodName) {
    var isFind = methodName == 'find';

    it('`_.' + methodName + '` should support shortcut fusion', function() {
      var findCount = 0,
          mapCount = 0,
          array = lodashStable.range(1, LARGE_ARRAY_SIZE + 1),
          iteratee = function(value) { mapCount++; return square(value); },
          predicate = function(value) { findCount++; return isEven(value); },
          actual = _(array).map(iteratee)[methodName](predicate);

      assert.strictEqual(findCount, isFind ? 2 : 1);
      assert.strictEqual(mapCount, isFind ? 2 : 1);
      assert.strictEqual(actual, isFind ? 4 : square(LARGE_ARRAY_SIZE));
    });
  });
});