Analysis::AST::FieldUsage supports deprecated enum

Author: lukes

lib/graphql/analysis/ast/field_usage.rb

@@ -43,6 +43,9 @@ def extract_deprecated_arguments(argument_values)
 
             if argument.definition.type.kind.input_object?
               extract_deprecated_arguments(argument.value.arguments.argument_values) # rubocop:disable Development/ContextIsPassedCop -- runtime args instance
+            elsif argument.definition.type.kind.enum?
+              enum_value = argument.definition.type.values[argument.value]
+              @used_deprecated_arguments << argument.definition.path if enum_value.deprecation_reason
             elsif argument.definition.type.list?
               argument
                 .value

spec/graphql/analysis/ast/field_usage_spec.rb

@@ -138,6 +138,20 @@
     end
   end
 
+  describe "query with deprecated enum argument" do
+    let(:query_string) {%|
+      query {
+        fromSource(source: YAK) {
+          id
+        }
+      }
+    |}
+
+    it "keeps track of deprecated arguments" do
+      assert_equal ['Query.fromSource.source'], result[:used_deprecated_arguments]
+    end
+  end
+
   describe "query with an array argument sent as null" do
     let(:query_string) {%|
       query {