Add :allow_nil option to delegate_missing_to; use in ActiveStorage

attachment

1 files changed, 14 insertions, 0 deletions

diff --git a/activesupport/test/core_ext/module_test.rb b/activesupport/test/core_ext/module_test.rb
index 04692f1484..6e341480d1 100644
--- a/activesupport/test/core_ext/module_test.rb
+++ b/activesupport/test/core_ext/module_test.rb
@@ -92,6 +92,16 @@ DecoratedTester = Struct.new(:client) do
   delegate_missing_to :client
 end
 
+class DecoratedMissingAllowNil
+  delegate_missing_to :case, allow_nil: true
+
+  attr_reader :case
+
+  def initialize(kase)
+    @case = kase
+  end
+end
+
 class DecoratedReserved
   delegate_missing_to :case
 
@@ -382,6 +392,10 @@ class ModuleTest < ActiveSupport::TestCase
     assert_equal "name delegated to client, but client is nil", e.message
   end
 
+  def test_delegate_missing_to_returns_nil_if_allow_nil_and_nil_target
+    assert_nil DecoratedMissingAllowNil.new(nil).name
+  end
+
   def test_delegate_missing_to_affects_respond_to
     assert_respond_to DecoratedTester.new(@david), :name
     assert_not_respond_to DecoratedTester.new(@david), :private_name