import assert from 'assert';
import lodashStable from 'lodash';
import { falsey, stubFalse, args, slice, symbol, realm } from './utils.js';
import isDate from '../isDate.js';

describe('isDate', function() {
  it('should return `true` for dates', function() {
    assert.strictEqual(isDate(new Date), true);
  });

  it('should return `false` for non-dates', function() {
    var expected = lodashStable.map(falsey, stubFalse);

    var actual = lodashStable.map(falsey, function(value, index) {
      return index ? isDate(value) : isDate();
    });

    assert.deepStrictEqual(actual, expected);

    assert.strictEqual(isDate(args), false);
    assert.strictEqual(isDate([1, 2, 3]), false);
    assert.strictEqual(isDate(true), false);
    assert.strictEqual(isDate(new Error), false);
    assert.strictEqual(isDate(_), false);
    assert.strictEqual(isDate(slice), false);
    assert.strictEqual(isDate({ 'a': 1 }), false);
    assert.strictEqual(isDate(1), false);
    assert.strictEqual(isDate(/x/), false);
    assert.strictEqual(isDate('a'), false);
    assert.strictEqual(isDate(symbol), false);
  });

  it('should work with a date object from another realm', function() {
    if (realm.date) {
      assert.strictEqual(isDate(realm.date), true);
    }
  });
});