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

describe('isString', function() {
  it('should return `true` for strings', function() {
    assert.strictEqual(isString('a'), true);
    assert.strictEqual(isString(Object('a')), true);
  });

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

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

    assert.deepStrictEqual(actual, expected);

    assert.strictEqual(isString(args), false);
    assert.strictEqual(isString([1, 2, 3]), false);
    assert.strictEqual(isString(true), false);
    assert.strictEqual(isString(new Date), false);
    assert.strictEqual(isString(new Error), false);
    assert.strictEqual(isString(_), false);
    assert.strictEqual(isString(slice), false);
    assert.strictEqual(isString({ '0': 1, 'length': 1 }), false);
    assert.strictEqual(isString(1), false);
    assert.strictEqual(isString(/x/), false);
    assert.strictEqual(isString(symbol), false);
  });

  it('should work with strings from another realm', function() {
    if (realm.string) {
      assert.strictEqual(isString(realm.string), true);
    }
  });
});