DEV: Patch Net::BufferedIO to help debug spec flakes

Internal `/t/154170`

Author: davidtaylorhq

spec/lib/completions/cancel_manager_spec.rb

@@ -1,5 +1,27 @@
 # frozen_string_literal: true
 
+# Debugging https://github.com/ruby/net-protocol/issues/32
+# which seems to be happening inconsistently in CI
+Net::BufferedIO.prepend(
+  Module.new do
+    def initialize(*args, **kwargs)
+      puts "Initializing #{kwargs.inspect}"
+      if kwargs[:debug_output] && !kwargs[:debug_output].respond_to(:<<)
+        raise ArgumentError, "debug_output must support <<"
+      end
+      super
+    end
+
+    def debug_output=(debug_output)
+      puts "SETTING DEBUG OUTPUT: #{debug_output.inspect}"
+      if debug_output && !debug_output.respond_to?(:<<)
+        raise ArgumentError, "debug_output must support <<"
+      end
+      super
+    end
+  end,
+)
+
 describe DiscourseAi::Completions::CancelManager do
   fab!(:model) { Fabricate(:anthropic_model, name: "test-model") }