Whenever Vector is removed from core, this can be replaced with
"fallback" (or something that is shipped with core). Ideally this
test wouldn't depend upon Skin, but that's a whole different issue.
Change-Id: I76a74deb95643e0d05f4d0f7e3e8d78f0efc119c
$method = $class->getMethod( 'makeResourceLoaderLink' );
$method->setAccessible( true );
$ctx = new RequestContext();
+ $ctx->setSkin( Skin::newFromKey( 'vector' ) );
$ctx->setLanguage( 'en' );
$out = new OutputPage( $ctx );
$rl = $out->getResourceLoader();