Adding TestUtil.mockRaf here causes the existing tests to fail. But without it, $materialAria.expect does not run.

@ajoslin @ThomasBurleson This causes an issue when there is more than one component of the same type on a page: $materialAria.expect only executes for the last instance. Need to figure out a way to delay expectAttribute from running but still execute for every component that needs it.

Ah. right.

Just do:

function expectAttribute() {
  $$rAF(function() {
    //expectAttribute logic
  });
}

Passing false for copyElementText will accommodate components requiring a warning for aria-label if the developer forgot, such as material-slider. Passing true will try to copy the element's text (or use the optional defaultValue, like in the case of material-dialog). I'm open to renaming this parameter to something that sounds more boolean (or refactoring).

We include ngAria as a dependency of ngMaterial itself now, so this is extraneous.