Tests that adding a new rule creates inspector stylesheet resource and allows its live editing.

Inspector stylesheet URL: inspector-stylesheet
Inspector stylesheet content:


Setting new content
Inspector stylesheet content:
#inspected { background-color: green; }
[expanded] 
element.style { ()

[expanded] 
#inspected { (inspector-stylesheet:1 -> inspector-stylesheet:1:13)
    background-color: green;

[expanded] 
div { (user agent stylesheet)
    display: block;
    unicode-bidi: isolate;