Empty Puts Crashes

[adenta]

#!/usr/bin/env ruby
# Minimal example demonstrating the bug when calling puts() with no arguments
# in terminalwire/ruby
#
# Expected behavior: Should print a blank line (like standard Ruby puts)
# Actual behavior: Raises an error
#
# To run this example, you need:
# gem install terminalwire-server terminalwire-client

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'terminalwire-server'
  gem 'terminalwire-client'
  gem 'async'
  gem 'async-websocket'
end

require 'terminalwire/server'
require 'terminalwire/client'

# Mock adapter for testing without a real WebSocket connection
class MockAdapter
  def initialize
    @messages = []
  end

  def write(message)
    @messages << message
    puts "Server sent: #{message.inspect}"
  end

  def read
    # Simulate client response based on the command
    last_message = @messages.last
    
    if last_message && last_message[:command] == "read" && last_message[:parameters][:name] == "TERMINALWIRE_HOME"
      # Return a mock home directory
      { status: "success", response: "/tmp/terminalwire" }
    else
      # Default success response
      { status: "success", response: nil }
    end
  end

  def close
    # No-op
  end
end

# Create a mock entitlement
entitlement = {
  authority: "example.com",
  paths: [],
  schemes: [],
  environment_variables: []
}

# Create server context with mock adapter
adapter = MockAdapter.new
context = Terminalwire::Server::Context.new(adapter: adapter, entitlement: entitlement)

puts "=" * 60
puts "Testing Terminalwire puts() with no arguments"
puts "=" * 60
puts

# Test 1: puts with content (this works)
puts "Test 1: puts with content (should work)"
begin
  context.puts "Hello, World!"
  puts "✓ Success: puts with content works"
rescue => e
  puts "✗ Error: #{e.class}: #{e.message}"
end
puts

# Test 2: puts with no arguments (this should work but may error)
puts "Test 2: puts with no arguments (should print blank line)"
begin
  context.puts
  puts "✓ Success: puts with no arguments works"
rescue ArgumentError => e
  puts "✗ Error: #{e.class}: #{e.message}"
  puts "   This is the bug! Ruby's puts() with no args should print a blank line."
rescue => e
  puts "✗ Error: #{e.class}: #{e.message}"
end
puts

# Test 3: puts with nil (similar issue)
puts "Test 3: puts with nil (should print blank line)"
begin
  context.puts nil
  puts "✓ Success: puts with nil works"
rescue => e
  puts "✗ Error: #{e.class}: #{e.message}"
end
puts

puts "=" * 60
puts "Expected behavior:"
puts "  All three tests should succeed, as Ruby's standard puts() method"
puts "  accepts zero or more arguments and prints blank lines for no args."
puts
puts "Suggested fix:"
puts "  In terminalwire-server/lib/terminalwire/server/resource.rb,"
puts "  change the STDOUT#puts method to:"
puts
puts "    def puts(*args)"
puts "      data = args.empty? ? \"\" : args.first"
puts "      command(\"print_line\", data: data)"
puts "    end"
puts "=" * 60