Translate url string to <a> html sting

<!DOCTYPE html>
<html>

  <head>
    <!-- Jasmine -->
    <link data-require="jasmine@*" data-semver="2.0.0" rel="stylesheet" href="//cdn.jsdelivr.net/jasmine/2.0.0/jasmine.css" />
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    <script data-require="jasmine@*" data-semver="2.0.0" src="//cdn.jsdelivr.net/jasmine/2.0.0/jasmine-html.js"></script>
    <script data-require="jasmine@*" data-semver="2.0.0" src="//cdn.jsdelivr.net/jasmine/2.0.0/boot.js"></script>
    <link rel="stylesheet" href="style.css" />
    
    <!-- Angular -->
    <script data-require="angular.js@1.2.x" src="https://code.angularjs.org/1.2.16/angular.js" data-semver="1.2.16"></script>
    <script data-require="angular-mocks@*" data-semver="1.2.16" src="https://code.angularjs.org/1.2.16/angular-mocks.js"></script>
    <script data-require="angular-sanitize@*" data-semver="1.2.13" src="http://code.angularjs.org/1.2.13/angular-sanitize.js"></script>
    
    <!-- Filter Def. -->
    <script src="app.js"></script>
    
    <!-- Jasmin test -->
    <script src="app.spec.js"></script>
    
  </head>

  <body ng-app="myApp">
    <!-- Usage  -->
    <div ng-init="text='http://step.pe'">
      <p ng-bind-html="text | parseUrl"></p>
    </div>
    <!-- Unit tests are displayed here -->
    <div id="HTMLReporter" class="jasmine_reporter"></div>
  </body>

</html>

// Code goes here

angular.module('myApp', ['ngSanitize'])
  .filter('parseUrl', function () {
    var ptn = /(\b(https?):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/gim;
    
    return function (input) {
      return input.replace(ptn, '<a href=\"$1\" target=\"_blank\">$1</a>');
    };
  });

describe('Filter: parseUrl', function () {

  // load the filter's module
  beforeEach(module('myApp'));

  // initialize a new instance of the filter before each test
  var parseUrl;
  beforeEach(inject(function ($filter) {
    parseUrl = $filter('parseUrl');
  }));

  it('URL 1개를 추출한다.', function () {
    var text = 'http://step.pe';
    expect(parseUrl(text))
      .toEqual('<a href="' + text + '" target="_blank">' + text + '</a>');
    console.log(parseUrl(text));
  });

  it('URL 2개를 추출한다.', function () {
    var url_1 = 'http://step.pe',
      foo = ' foo ',
      url_2 = 'https://google.com',
      text = url_1 + foo + url_2;

    expect(parseUrl(text))
      .toEqual('<a href="' + url_1 + '" target="_blank">' + url_1 + '</a>' +
        foo +
        '<a href="' + url_2 + '" target="_blank">' + url_2 + '</a>');

    console.log(parseUrl(text));
  });

});