/**
 * Copyright (c) 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */
'use strict';

describe('truncate', () => {

  var truncate = require('truncate');

  it('should truncate', () => {
    expect(truncate('Hello, world.', 5))
      .toBe('He...');
  });
  it('should not truncate', () => {
    expect(truncate('Hello, world.', 50))
      .toBe('Hello, world.');
  });
  it('should not truncate more than minDelta chars.', () => {
    expect(truncate('Hello, world.', 7, {minDelta: 10}))
      .toBe('Hello, world.');
    expect(truncate('Hello, world.', 7, {minDelta: 9}))
      .toBe('Hell...');
  });
  it('should break in the middle of words', () => {
    expect(truncate('Hello, world.  How are you?', 18, {breakOnWords: false}))
      .toBe('Hello, world.  H...');
    expect(truncate('Hello, world.\nHow are you?', 18, {breakOnWords: false}))
      .toBe('Hello, world.\nHo...');
  });
  it('should break at word boundaries', () => {
    expect(truncate('Hello, world.  How are you?', 18, {breakOnWords: true}))
      .toBe('Hello, world....');
    expect(truncate('Hello, world.\nHow are you?', 18, {breakOnWords: true}))
      .toBe('Hello, world....');
  });
  it('should uses custom elipses', () => {
    expect(truncate('Hello, world.', 9, {elipsis: '&middot'}))
      .toBe('He&middot');
  });
  it('shouldn\'t barf with weird input', () => {
    expect(truncate('Hello, world.', 0))
      .toBe('Hello,...');
    expect(truncate('Hello, world.', -132))
      .toBe('...');
    expect(truncate('', 0))
      .toBe('');
    expect(truncate(null, 0))
      .toBe(null);
  });
});