This is a testharness.js-based test.
[FAIL] cancelling the readable side should call transformer.cancel()
  assert_equals: transformer.cancel() should be called with the passed reason expected (object) object "error1: bad things are happening!" but got (undefined) undefined
[FAIL] cancelling the readable side should reject if transformer.cancel() throws
  assert_unreached: Should have rejected: readable.cancel() should reject with thrownError Reached unreachable code
[FAIL] aborting the writable side should call transformer.abort()
  assert_equals: transformer.abort() should be called with the passed reason expected (object) object "error1: bad things are happening!" but got (undefined) undefined
[FAIL] aborting the writable side should reject if transformer.cancel() throws
  assert_unreached: Should have rejected: writable.abort() should reject with thrownError Reached unreachable code
[FAIL] closing the writable side should reject if a parallel transformer.cancel() throws
  assert_unreached: Should have rejected: cancelPromise should reject with thrownError Reached unreachable code
[FAIL] readable.cancel() and a parallel writable.close() should reject if a transformer.cancel() calls controller.error()
  assert_unreached: Should have rejected: cancelPromise should reject with thrownError Reached unreachable code
[FAIL] writable.abort() and readable.cancel() should reject if a transformer.cancel() calls controller.error()
  assert_unreached: Should have rejected: cancelPromise should reject with thrownError Reached unreachable code
[FAIL] readable.cancel() should not call cancel() again when already called from writable.abort()
  assert_equals: expected 1 but got 0
[FAIL] writable.close() should not call flush() when cancel() is already called from readable.cancel()
  assert_true: cancel() was called expected true got false
[FAIL] writable.abort() should not call cancel() again when already called from readable.cancel()
  assert_unreached: Should have rejected: undefined Reached unreachable code
Harness: the test ran to completion.