first mockup in go

static/bower_components/select2/tests/selection/focusing-tests.js

@@ -0,0 +1,41 @@
+module('Selection containers - Managing focus');
+
+var SingleSelection = require('select2/selection/single');
+
+var $ = require('jquery');
+var Options = require('select2/options');
+
+var options = new Options({});
+
+test('close sets the focus to the selection', function (assert) {
+  var $container = $('#qunit-fixture .event-container');
+  var container = new MockContainer();
+  var selection = new SingleSelection(
+    $('#qunit-fixture .single'),
+    options
+  );
+
+  var $selection = selection.render();
+  selection.bind(container, $container);
+
+  selection.update([{
+    id: 'test',
+    text: 'test'
+  }]);
+
+  $container.append($selection);
+
+  assert.notEqual(
+    document.activeElement,
+    $selection[0],
+    'The selection had focus originally'
+  );
+
+  container.trigger('close');
+
+  assert.equal(
+    document.activeElement,
+    $selection[0],
+    'After close, focus must be set to selection'
+  );
+});