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require 'net/smtp'
require 'test/unit'
module Net
class TestStarttls < Test::Unit::TestCase
class MySMTP < SMTP
def initialize(socket)
@fake_socket = socket
super("smtp.example.com")
end
def tcp_socket(*)
@fake_socket
end
def tlsconnect(*)
@fake_socket
end
end
def teardown
@server_thread&.exit
@server_socket&.close
@client_socket&.close
end
def start_smtpd(starttls)
@server_socket, @client_socket = UNIXSocket.pair
@starttls_executed = false
@server_thread = Thread.new(@server_socket) do |s|
s.puts "220 fakeserver\r\n"
while cmd = s.gets&.chomp
case cmd
when /\AEHLO /
s.puts "250-fakeserver\r\n"
s.puts "250-STARTTLS\r\n" if starttls
s.puts "250 8BITMIME\r\n"
when /\ASTARTTLS/
@starttls_executed = true
s.puts "220 2.0.0 Ready to start TLS\r\n"
else
raise "unsupported command: #{cmd}"
end
end
end
@client_socket
end
def test_default_with_starttls_capable
smtp = MySMTP.new(start_smtpd(true))
smtp.start
assert(@starttls_executed)
end
def test_default_without_starttls_capable
smtp = MySMTP.new(start_smtpd(false))
smtp.start
assert(!@starttls_executed)
end
def test_enable_starttls_with_starttls_capable
smtp = MySMTP.new(start_smtpd(true))
smtp.enable_starttls
smtp.start
assert(@starttls_executed)
end
def test_enable_starttls_without_starttls_capable
smtp = MySMTP.new(start_smtpd(false))
smtp.enable_starttls
err = assert_raise(Net::SMTPUnsupportedCommand) { smtp.start }
assert_equal("STARTTLS is not supported on this server", err.message)
end
def test_enable_starttls_auto_with_starttls_capable
smtp = MySMTP.new(start_smtpd(true))
smtp.enable_starttls_auto
smtp.start
assert(@starttls_executed)
end
def test_tls_with_starttls_capable
smtp = MySMTP.new(start_smtpd(true))
smtp.enable_tls
smtp.start
assert(!@starttls_executed)
end
def test_tls_without_starttls_capable
smtp = MySMTP.new(start_smtpd(false))
smtp.enable_tls
end
def test_disable_starttls
smtp = MySMTP.new(start_smtpd(true))
smtp.disable_starttls
smtp.start
assert(!@starttls_executed)
end
def test_enable_tls_and_enable_starttls
smtp = MySMTP.new(start_smtpd(true))
smtp.enable_tls
err = assert_raise(ArgumentError) { smtp.enable_starttls }
assert_equal("SMTPS and STARTTLS is exclusive", err.message)
end
def test_enable_tls_and_enable_starttls_auto
smtp = MySMTP.new(start_smtpd(true))
smtp.enable_tls
err = assert_raise(ArgumentError) { smtp.enable_starttls_auto }
assert_equal("SMTPS and STARTTLS is exclusive", err.message)
end
def test_enable_starttls_and_enable_starttls_auto
smtp = MySMTP.new(start_smtpd(true))
smtp.enable_starttls
assert_nothing_raised { smtp.enable_starttls_auto }
end
end
end
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