#!/usr/bin/env ruby
# frozen_string_literal: true

# JRuby #9242: def initialize(...) + super(...) in a module prepended on a
# Struct subclass incorrectly warns about keyword arguments (3+ members)
# or crashes with ClassCastException (1 member).
#
# Run: ruby jruby_9242_struct_initialize.rb 2>&1

require "stringio"

puts "Ruby: #{RUBY_DESCRIPTION}"
puts

old_stderr = $stderr
$stderr = StringIO.new

mod = Module.new do
  def initialize(...)
    super(...)
  end
end

# Test 1: 3-member Struct (triggers spurious keyword warning)
puts "1. Struct with 3 members + prepended initialize(...):"
S3 = Struct.new(:a, :b, :c) { prepend mod }
obj3 = S3.new(1, 2, 3)
puts "   a=#{obj3.a} b=#{obj3.b} c=#{obj3.c}"
stderr_output = $stderr.string
$stderr = StringIO.new
if stderr_output.include?("keyword")
  puts "   FAIL: spurious warning: #{stderr_output.strip}"
else
  puts "   PASS: no spurious warning"
end
puts

# Test 2: 1-member Struct (used to crash with ClassCastException)
puts "2. Struct with 1 member + prepended initialize(...):"
begin
  S1 = Struct.new(:x) { prepend mod }
  obj1 = S1.new(1)
  stderr_output = $stderr.string
  $stderr = StringIO.new
  if stderr_output.include?("keyword")
    puts "   x=#{obj1.x}"
    puts "   FAIL: spurious warning: #{stderr_output.strip}"
  else
    puts "   x=#{obj1.x}"
    puts "   PASS: no crash, no warning"
  end
rescue => e
  puts "   FAIL: #{e.class}: #{e.message}"
end
puts

# Test 3: Same but with include instead of prepend
puts "3. Struct with 3 members + included initialize(...):"
$stderr = StringIO.new
S3i = Struct.new(:a, :b, :c) { include mod }
obj3i = S3i.new(1, 2, 3)
puts "   a=#{obj3i.a} b=#{obj3i.b} c=#{obj3i.c}"
stderr_output = $stderr.string
if stderr_output.include?("keyword")
  puts "   FAIL: spurious warning: #{stderr_output.strip}"
else
  puts "   PASS: no spurious warning"
end

$stderr = old_stderr