Add endpoint

app/controllers/api/bootcamp/drawings_controller.rb

@@ -0,0 +1,14 @@
+class API::Bootcamp::DrawingsController < API::Bootcamp::BaseController
+  before_action :use_drawing
+
+  def update
+    @drawing.update(code: params[:code])
+
+    render json: {}, status: :ok
+  end
+
+  private
+  def use_drawing
+    @drawing = current_user.bootcamp_drawings.find_by!(uuid: params[:uuid])
+  end
+end

test/controllers/api/bootcamp/drawings_controller_test.rb

@@ -0,0 +1,17 @@
+require_relative '../base_test_case'
+
+class API::Bootcamp::DrawingsControllerTest < API::BaseTestCase
+  test "update: updates and 200s" do
+    user = create :user
+    drawing = create(:bootcamp_drawing, user:)
+    code = "Something"
+
+    setup_user(user)
+    patch api_bootcamp_drawing_url(drawing, code:), headers: @headers
+
+    assert_response :ok
+    assert_json_response({})
+
+    assert code, drawing.reload.code
+  end
+end