https://git.ruby-lang.org/ruby.git/commit/?id=ae8362fdc8

From ae8362fdc89591baeb0f4d735690c17d6147f80e Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@g...>
Date: Tue, 2 Jun 2020 15:33:05 +0200
Subject: Add a spec for the new NoMethodError display of the receiver


diff --git a/spec/ruby/core/exception/no_method_error_spec.rb b/spec/ruby/core/exception/no_method_error_spec.rb
index 55a5fcc..420e107 100644
--- a/spec/ruby/core/exception/no_method_error_spec.rb
+++ b/spec/ruby/core/exception/no_method_error_spec.rb
@@ -103,6 +103,24 @@ describe "NoMethodError#message" do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/exception/no_method_error_spec.rb#L103
       message.should include test_class.inspect
     end
   end
+
+  ruby_version_is "2.8" do
+    it "uses #name to display the receiver if it is a class or a module" do
+      klass = Class.new { def self.name; "MyClass"; end }
+      begin
+        klass.foo
+      rescue NoMethodError => error
+        error.message.lines.first.should == "undefined method `foo' for MyClass:Class\n"
+      end
+
+      mod = Module.new { def self.name; "MyModule"; end }
+      begin
+        mod.foo
+      rescue NoMethodError => error
+        error.message.lines.first.should == "undefined method `foo' for MyModule:Module\n"
+      end
+    end
+  end
 end
 
 describe "NoMethodError#dup" do
-- 
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