[css3-flexbox] getComputedStyle on flex property

What should getComputedStyle return when called on the flex property?  Here
are some examples with my guesses:

div.style.flex = 'none';
getComputedStyle(div).flex -> 0 0 auto

div.style.flex = '1 2 3px';
getComputedStyle(div).flex -> 1 2 3px

div.style.flex = '1 2 50%';
getComputedStyle(div).flex -> 1 2 50%

div.style.flex = '1 2 1em';
getComputedStyle(div).flex -> 1 2 16px

div.style.flex = '1 2 auto';
getComputedStyle(div).flex -> 1 2 auto

Does that seem correct?