require 'test/unit'
require 'environment'

class TestDestErrorHandling < Test::Unit::TestCase
  def setup
    @env = Environment.new
    @env.writefile1('0' * 4)
    @env.listen1
  end

  def teardown
    @env.cleanup
  end

  def test_hello_blocked_by_disconnect_causes_error_not_fatal
    run_fake('source/close_after_connect')
    assert_no_control
  end

  #   # This is disabled while CLIENT_MAX_WAIT_SECS is removed
  #   def test_hello_goes_astray_causes_timeout_error
  #     run_fake( "source/hang_after_hello" )
  #     assert_no_control
  #   end

  def test_sigterm_has_bad_exit_status
    @env.nbd1.can_die(1)
    run_fake('source/sigterm_after_hello')
  end

  def test_disconnect_after_hello_causes_error_not_fatal
    run_fake('source/close_after_hello')
    assert_no_control
  end

  def test_partial_read_causes_error
    run_fake('source/close_mid_read')
  end

  def test_double_connect_during_hello
    run_fake('source/connect_during_hello')
  end

  def test_acl_rejection
    @env.acl1('127.0.0.1')
    run_fake('source/connect_from_banned_ip')
  end

  def test_bad_write
    run_fake('source/write_out_of_range')
  end

  def test_disconnect_before_write_data_causes_error
    run_fake('source/close_after_write')
  end

  def test_disconnect_before_write_reply_causes_error
    # Note that this is an odd case: writing the reply doesn't fail.
    # The test passes because the next attempt by flexnbd to read a
    # request returns EOF.
    run_fake('source/close_after_write_data')
  end

  def test_straight_migration
    @env.nbd1.can_die(0)
    run_fake('source/successful_transfer')
  end

  private

  def run_fake(name)
    @env.run_fake(name, @env.ip, @env.port1)
    assert @env.fake_reports_success, "#{name} failed."
  end

  def status
    stat, = @env.status1
    stat
  end

  def assert_no_control
    assert !status['has_control'], 'Thought it had control'
  end

  def assert_control
    assert status['has_control'], "Didn't think it had control"
  end
end # class TestDestErrorHandling