React component helper specs (#24072)

spec/helpers/react_component_helper_spec.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ReactComponentHelper do
+  describe 'react_component' do
+    context 'with no block passed in' do
+      let(:result) { helper.react_component('name', { one: :two }) }
+
+      it 'returns a tag with data attributes' do
+        expect(parsed_html.div['data-component']).to eq('Name')
+        expect(parsed_html.div['data-props']).to eq('{"one":"two"}')
+      end
+    end
+
+    context 'with a block passed in' do
+      let(:result) do
+        helper.react_component('name', { one: :two }) do
+          helper.content_tag(:nav, 'ok')
+        end
+      end
+
+      it 'returns a tag with data attributes' do
+        expect(parsed_html.div['data-component']).to eq('Name')
+        expect(parsed_html.div['data-props']).to eq('{"one":"two"}')
+        expect(parsed_html.div.nav.content).to eq('ok')
+      end
+    end
+  end
+
+  describe 'react_admin_component' do
+    let(:result) { helper.react_admin_component('name', { one: :two }) }
+
+    it 'returns a tag with data attributes' do
+      expect(parsed_html.div['data-admin-component']).to eq('Name')
+      expect(parsed_html.div['data-props']).to eq('{"locale":"en","one":"two"}')
+    end
+  end
+
+  private
+
+  def parsed_html
+    Nokogiri::Slop(result)
+  end
+end