class Net::SSH::Test::Kex

“test” algorithm.
This registers itself with the transport key-exchange system as the
too many assumptions about the server’s response.)
(This strategy would never really work against a real SSH server–it makes
An implementation of a key-exchange strategy specifically for unit tests.

def exchange_keys

and does not actually exchange keys.
Exchange keys with the server. This returns a hash of constant values, 
def exchange_keys
  result = Net::SSH::Buffer.from(:byte, NEWKEYS)
  @connection.send_message(result)
  buffer = @connection.next_message
  raise Net::SSH::Exception, "expected NEWKEYS" unless buffer.type == NEWKEYS
  { session_id: "abc-xyz",
    server_key: OpenSSL::PKey::RSA.new(512),
    shared_secret: OpenSSL::BN.new("1234567890", 10),
    hashing_algorithm: OpenSSL::Digest::SHA1 }
end

def initialize(algorithms, connection, data)

given arguments.
Creates a new instance of the testing key-exchange algorithm with the 
def initialize(algorithms, connection, data)
  @connection = connection
end