This is a testharness.js-based test.
[FAIL] WebTransportDatagramDuplexStream#writable is removed
  assert_false: expected false got true
[FAIL] WebTransportDatagramDuplexStream#incomingHighWaterMark is removed
  assert_false: expected false got true
[FAIL] WebTransportDatagramDuplexStream#outgoingHighWaterMark is removed
  assert_false: expected false got true
Harness: the test ran to completion.