@tetcoin/util/is/instanceOf.spec.js

A collection of useful utilities for @tetcoin

"use strict";

var _ = require(".");

// Copyright 2017-2019 @polkadot/util authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
describe('isInstanceOf', () => {
  it('returns true on real instances', () => {
    expect((0, _.isInstanceOf)(new Array(2), Array)).toEqual(true);
  });
  it('returns false on non-allocated instances', () => {
    expect((0, _.isInstanceOf)([], Array)).toEqual(true);
  });
  it('returns false on non-instances', () => {
    expect((0, _.isInstanceOf)('array', Array)).toEqual(false);
  });
  it('returns false when class not specified', () => {
    expect((0, _.isInstanceOf)('array', Array)).toEqual(false);
  });
  it('returns false on wrong class type', () => {
    expect((0, _.isInstanceOf)(new Array(2), String)).toEqual(false);
  });
});