How to use

queue

function

in

d3-queue

function add (watchGroups, onDone, testsCb) {
 if (!_.isArray(watchGroups)) {
  watchGroups = [watchGroups];
 }
 onDone = onDone || identity;
 // Add this hook for testing
 testsCb = _.defaults({}, testsCb || {}, {
  onInit: identity,
  onEvent: identity,
  onCommandEvent: identity,
  onTaskFileEvent: identity
 });

 var q = queue();

 // Loop through each file directive
 watchGroups.forEach(function (watchGroup) {
  q.defer(processWatchGroup(testsCb), watchGroup);
 });
 q.awaitAll(function (err, onDones) {
  onDone(err, onDones);
 });
}