Add test for readings controller

test/controllers/readings_controller_test.rb

@@ -0,0 +1,15 @@
+require "test_helper"
+
+class ReadingsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in_as :kevin
+  end
+
+  test "index" do
+    assert_changes -> { notifications(:logo_created_kevin).reload.read? }, from: false, to: true do
+      post bucket_bubble_readings_url(bubbles(:logo).bucket, bubbles(:logo)), as: :turbo_stream
+    end
+
+    assert_response :success
+  end
+end