From fdfb43b2b129afb78c352c95776118eeceb245a2 Mon Sep 17 00:00:00 2001 From: Koichi Sasada Date: Mon, 13 Dec 2021 02:02:41 +0900 Subject: fix Struct's setter arity https://github.com/ruby/ruby/pull/5131/files#diff-b2553d23e6b1fe76e20608d06c25f6acca06279100f1a9c24febcd79a82fac3cR2689 --- test/ruby/test_struct.rb | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'test/ruby') diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb index b0e6bae9e3..5a39ecc3aa 100644 --- a/test/ruby/test_struct.rb +++ b/test/ruby/test_struct.rb @@ -497,6 +497,20 @@ module TestStruct assert_equal(42, x.public_send("a")) end + def test_arity + klass = @Struct.new(:a) + assert_equal 0, klass.instance_method(:a).arity + assert_equal 1, klass.instance_method(:a=).arity + + klass.module_eval do + define_method(:b=, &klass.new.method(:a=).to_proc) + alias c= a= + end + + assert_equal 1, klass.instance_method(:b=).arity + assert_equal 1, klass.instance_method(:c=).arity + end + def test_parameters klass = @Struct.new(:a) assert_equal [], klass.instance_method(:a).parameters -- cgit v1.2.3