User can select a hub

spec/javascripts/unit/admin/controllers/override_variants_controller_spec.js.coffee

@@ -0,0 +1,26 @@
+describe "OverrideVariantsCtrl", ->
+  ctrl = null
+  scope = null
+  hubs = [{id: 1, name: 'Hub'}]
+
+  beforeEach ->
+    module 'ofn.admin'
+    scope = {}
+
+    inject ($controller)->
+      ctrl = $controller 'AdminOverrideVariantsCtrl', {$scope: scope, hubs: hubs}
+
+  it "initialises the hub list and the chosen hub", ->
+    expect(scope.hubs).toEqual hubs
+    expect(scope.hub).toBeNull
+
+  describe "selecting a hub", ->
+    it "sets the chosen hub", ->
+      scope.hub_id = 1
+      scope.selectHub()
+      expect(scope.hub).toEqual hubs[0]
+
+    it "does nothing when no selection has been made", ->
+      scope.hub_id = ''
+      scope.selectHub
+      expect(scope.hub).toBeNull