import assert from 'assert';
import { _, slice } from './utils.js';

describe('over', function() {
  it('should create a function that invokes `iteratees`', function() {
    var over = _.over(Math.max, Math.min);
    assert.deepStrictEqual(over(1, 2, 3, 4), [4, 1]);
  });

  it('should use `_.identity` when a predicate is nullish', function() {
    var over = _.over(undefined, null);
    assert.deepStrictEqual(over('a', 'b', 'c'), ['a', 'a']);
  });

  it('should work with `_.property` shorthands', function() {
    var over = _.over('b', 'a');
    assert.deepStrictEqual(over({ 'a': 1, 'b': 2 }), [2, 1]);
  });

  it('should work with `_.matches` shorthands', function() {
    var over = _.over({ 'b': 1 }, { 'a': 1 });
    assert.deepStrictEqual(over({ 'a': 1, 'b': 2 }), [false, true]);
  });

  it('should work with `_.matchesProperty` shorthands', function() {
    var over = _.over([['b', 2], ['a', 2]]);

    assert.deepStrictEqual(over({ 'a': 1, 'b': 2 }), [true, false]);
    assert.deepStrictEqual(over({ 'a': 2, 'b': 1 }), [false, true]);
  });

  it('should differentiate between `_.property` and `_.matchesProperty` shorthands', function() {
    var over = _.over(['a', 1]);

    assert.deepStrictEqual(over({ 'a': 1, '1': 2 }), [1, 2]);
    assert.deepStrictEqual(over({ 'a': 2, '1': 1 }), [2, 1]);

    over = _.over([['a', 1]]);

    assert.deepStrictEqual(over({ 'a': 1 }), [true]);
    assert.deepStrictEqual(over({ 'a': 2 }), [false]);
  });

  it('should provide arguments to predicates', function() {
    var over = _.over(function() {
      return slice.call(arguments);
    });

    assert.deepStrictEqual(over('a', 'b', 'c'), [['a', 'b', 'c']]);
  });

  it('should use `this` binding of function for `iteratees`', function() {
    var over = _.over(function() { return this.b; }, function() { return this.a; }),
        object = { 'over': over, 'a': 1, 'b': 2 };

    assert.deepStrictEqual(object.over(), [2, 1]);
  });
});