1 files changed, 27 insertions, 5 deletions
diff --git a/activesupport/test/array_inquirer_test.rb b/activesupport/test/array_inquirer_test.rb
index 263ab3802b..d5419b862d 100644
--- a/activesupport/test/array_inquirer_test.rb
+++ b/activesupport/test/array_inquirer_test.rb
@@ -1,9 +1,11 @@
-require 'abstract_unit'
-require 'active_support/core_ext/array'
+# frozen_string_literal: true
+
+require "abstract_unit"
+require "active_support/core_ext/array"
 
 class ArrayInquirerTest < ActiveSupport::TestCase
   def setup
-    @array_inquirer = ActiveSupport::ArrayInquirer.new([:mobile, :tablet, 'api'])
+    @array_inquirer = ActiveSupport::ArrayInquirer.new([:mobile, :tablet, "api"])
   end
 
   def test_individual
@@ -19,7 +21,7 @@ class ArrayInquirerTest < ActiveSupport::TestCase
   end
 
   def test_any_string_symbol_mismatch
-    assert @array_inquirer.any?('mobile')
+    assert @array_inquirer.any?("mobile")
     assert @array_inquirer.any?(:api)
   end
 
@@ -33,9 +35,29 @@ class ArrayInquirerTest < ActiveSupport::TestCase
   end
 
   def test_inquiry
-    result = [:mobile, :tablet, 'api'].inquiry
+    result = [:mobile, :tablet, "api"].inquiry
 
     assert_instance_of ActiveSupport::ArrayInquirer, result
     assert_equal @array_inquirer, result
   end
+
+  def test_respond_to_fallback_to_array_respond_to
+    Array.class_eval do
+      def respond_to_missing?(name, include_private = false)
+        (name == :foo) || super
+      end
+    end
+    arr = ActiveSupport::ArrayInquirer.new([:x])
+
+    assert_respond_to arr, :can_you_hear_me?
+    assert_respond_to arr, :foo
+    assert_not_respond_to arr, :nope
+  ensure
+    Array.class_eval do
+      undef_method :respond_to_missing?
+      def respond_to_missing?(name, include_private = false)
+        super
+      end
+    end
+  end
 end