1 Tests that adding a new blank property works.
10 div { (user agent stylesheet)
13 After insertion at index 0:
20 div { (user agent stylesheet)
23 After appending and changing a 'compound' property:
32 div { (user agent stylesheet)
35 After insertion at index 2:
40 /-- overloaded --/ third-property: third-value;
45 div { (user agent stylesheet)