Added method RenderOptions has_random_dom_id?

lib/react_on_rails/react_component/render_options.rb

@@ -36,6 +36,14 @@ def dom_id
         end
       end
 
+      def has_random_dom_id?
+        return false if options[:id]
+
+        return false unless random_dom_id
+
+        true
+      end
+
       def html_options
         options[:html_options].to_h
       end

spec/react_on_rails/react_component/render_options_spec.rb

@@ -64,11 +64,12 @@ def the_attrs(react_component_name: "App", options: {})
     context "without id option" do
       context "with random_dom_id set to true" do
         it "returns a unique identifier" do
-          attrs = the_attrs(react_component_name: "SomeApp")
+          attrs = the_attrs(react_component_name: "SomeApp", options: { random_dom_id: true })
           opts = described_class.new(attrs)
 
           expect(SecureRandom).to receive(:uuid).and_return("123456789")
           expect(opts.dom_id).to eq "SomeApp-react-component-123456789"
+          expect(opts.has_random_dom_id?).to eq(true)
         end
 
         it "is memoized" do
@@ -83,6 +84,7 @@ def the_attrs(react_component_name: "App", options: {})
           attrs = the_attrs(react_component_name: "SomeApp", options: { random_dom_id: false})
           opts = described_class.new(attrs)
           expect(opts.dom_id).to eq "SomeApp-react-component"
+          expect(opts.has_random_dom_id?).to eq(false)
         end
       end
     end
@@ -95,6 +97,7 @@ def the_attrs(react_component_name: "App", options: {})
         opts = described_class.new(attrs)
 
         expect(opts.dom_id).to eq "im-an-id"
+        expect(opts.has_random_dom_id?).to eq(false)
       end
     end
   end