Rename Entropy::Configuration to just Entropy

test/controllers/collections/entropies_controller_test.rb

@@ -0,0 +1,16 @@
+require "test_helper"
+
+class Collections::EntropiesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in_as :kevin
+    @collection = collections(:writebook)
+  end
+
+  test "update" do
+    put collection_entropy_path(@collection), params: { collection: { auto_postpone_period: 1.day } }
+
+    assert_equal 1.day, @collection.entropy.reload.auto_postpone_period
+
+    assert_turbo_stream action: :replace, target: dom_id(@collection, :entropy)
+  end
+end