Add tests for reordering taxons

spec/controllers/spree/admin/taxons_controller_spec.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Spree::Admin::TaxonsController do
+  render_views
+
+  let(:taxonomy) { create(:taxonomy) }
+  let(:taxon) { create(:taxon, name: "Ruby", taxonomy: taxonomy) }
+  let(:taxon2) { create(:taxon, name: "Rails", taxonomy: taxonomy) }
+
+  before do
+    allow(controller).to receive(:spree_current_user) { current_api_user }
+
+    taxonomy.root.children << taxon
+    taxonomy.root.children << taxon2
+  end
+
+  context "as an admin" do
+    let(:current_api_user) { build(:admin_user) }
+
+    it "can reorder taxons" do
+      spree_post :update,
+                 taxonomy_id: taxonomy.id,
+                 id: taxon2.id,
+                 taxon: { parent_id: taxonomy.root.id, position: 0 }
+
+      expect(taxon2.reload.lft).to eq 2
+      expect(Spree::Taxonomy.find(taxonomy.id).root.children.first).to eq(taxon2)
+    end
+  end
+end