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