Add post status administration (#105)

spec/workflows/reorder_workflow_spec.rb

@@ -0,0 +1,35 @@
+require 'rails_helper'
+
+RSpec.describe ReorderWorkflow do
+  let(:workflow_creator) {
+    ReorderWorkflow.new(
+      entity_classname: entity_classname,
+      column_name: column_name,
+      entity_id: entity_id,
+      src_index: src_index,
+      dst_index: dst_index
+    )
+  }
+
+  let(:entity_classname) { PostStatus }
+  let(:column_name) { 'order' }
+  let(:entity_id) { post_status1.id }
+  let(:src_index) { post_status1.order }
+  let(:dst_index) { post_status3.order }
+
+  let!(:post_status0) { FactoryBot.create(:post_status, order: 0) }
+  let!(:post_status1) { FactoryBot.create(:post_status, order: 1) }
+  let!(:post_status2) { FactoryBot.create(:post_status, order: 2) }
+  let!(:post_status3) { FactoryBot.create(:post_status, order: 3) }
+  let!(:post_status4) { FactoryBot.create(:post_status, order: 4) }
+
+  it 'reorders entities after moving one of them' do
+    workflow_creator.run
+
+    expect(post_status0.reload.order).to eq(0)
+    expect(post_status1.reload.order).to eq(3)
+    expect(post_status3.reload.order).to eq(2)
+    expect(post_status2.reload.order).to eq(1)
+    expect(post_status4.reload.order).to eq(4)
+  end
+end