<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="container"></div>
<script>
  var $img1 = $('<img/>').attr('src', 'http://www.websharedesign.com/images/icon-testing.gif'),
      $img2 = $('<img/>').attr('src', 'http://www.hepcscotland.co.uk/images/testing.gif');
  $img1.appendTo('#container');
  
  var dimg = $img1.get();
  var cont = $('#container');
</script>

Setup JSvar s = true;

Teardown JS

Test cases

Test #1

Title *

Async

Code *

if(s){
    cont.find('img').replaceWith($img1);
} else{
    cont.find('img').replaceWith($img2);
}
s=!s;

Test #2

Title *

Async

Code *

if(s){
    $img1.attr('src', 'http://www.websharedesign.com/images/icon-testing.gif');
} else{
    $img1.attr('src', 'http://www.hepcscotland.co.uk/images/testing.gif');
}
s=!s;

Test #3

Title *

Async

Code *

if(s){
    dimg.src = 'http://www.websharedesign.com/images/icon-testing.gif';
} else{
    dimg.src = 'http://www.hepcscotland.co.uk/images/testing.gif';
}
s=!s;

Test #4

Title *

Async

Code *

if(s){
    $img1.get().src = 'http://www.websharedesign.com/images/icon-testing.gif';
} else{
    $img1.get().src = 'http://www.hepcscotland.co.uk/images/testing.gif';
}
s=!s;

Test case details

Preparation Code

Test cases

Test #1

Test #2

Test #3

Test #4