From eca31d24d606a73def3674938112dc3c5b79c445 Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@gmail.com>
Date: Sat, 18 Jun 2022 10:29:52 +0200
Subject: [Bug #18813] Warn when autoload has to lookup in parent namespace

This is a verbose mode only warning.
---
 test/ruby/test_autoload.rb | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'test/ruby/test_autoload.rb')

diff --git a/test/ruby/test_autoload.rb b/test/ruby/test_autoload.rb
index bd875ec008..2e1a6ef2b9 100644
--- a/test/ruby/test_autoload.rb
+++ b/test/ruby/test_autoload.rb
@@ -479,6 +479,7 @@ p Foo::Bar
       File.write(autoload_path, '')
 
       assert_separately(%W[-I #{tmpdir}], <<-RUBY)
+        $VERBOSE = nil
         path = #{File.realpath(autoload_path).inspect}
         autoload :X, path
         assert_equal(path, Object.autoload?(:X))
@@ -557,4 +558,20 @@ p Foo::Bar
       RUBY
     end
   end
+
+  def test_autoload_parent_namespace
+    Dir.mktmpdir('autoload') do |tmpdir|
+      autoload_path = File.join(tmpdir, "some_const.rb")
+      File.write(autoload_path, 'class SomeConst; end')
+
+      assert_separately(%W[-I #{tmpdir}], <<-RUBY)
+        module SomeNamespace
+          autoload :SomeConst, #{File.realpath(autoload_path).inspect}
+          assert_warning(%r{/some_const\.rb to define SomeNamespace::SomeConst but it didn't}) do
+            assert_not_nil SomeConst
+          end
+        end
+      RUBY
+    end
+  end
 end
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