Add serializer params test

test/unit/serializer/params_test.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+require "test_helper"
+
+module AMS
+  class Serializer
+    class ParamsTest < Test
+      class ParentModelSerializer < Serializer
+        relation :child_models, type: :comments, to: :many, ids: "object.child_models.map(&:id)"
+        relation :child_model, type: :comments, to: :one, id: "object.child_model.id"
+        paginated
+        query_params(:start_at, :end_at, filter: [:user_id])
+      end
+
+      def setup
+        super
+        @serializer_class = ParentModelSerializer
+        @field_params = [:child_models, :child_model]
+        @page_params = [:number, :size]
+        @query_params = [:start_at, :end_at, filter: [:user_id]]
+      end
+
+      def test_show_params
+        expected_params = [{ fields: @field_params }]
+        assert_equal expected_params, @serializer_class.show_params
+      end
+
+      def test_index_params
+        expected_params = [{ fields: @field_params }, { page: @page_params }, *@query_params]
+        assert_equal expected_params, @serializer_class.index_params
+      end
+    end
+  end
+end