@Test // SPR-17054 public void unsupportedMediaTypeShouldConsumeAndCancel() { NettyDataBufferFactory factory = new NettyDataBufferFactory(new PooledByteBufAllocator(true)); NettyDataBuffer buffer = factory.wrap(ByteBuffer.wrap("spring".getBytes(StandardCharsets.UTF_8))); TestPublisher<DataBuffer> body = TestPublisher.create(); MockClientHttpResponse response = new MockClientHttpResponse(HttpStatus.OK); response.getHeaders().setContentType(MediaType.APPLICATION_PDF); response.setBody(body.flux()); BodyExtractor<Mono<User>, ReactiveHttpInputMessage> extractor = BodyExtractors.toMono(User.class); StepVerifier.create(extractor.extract(response, this.context)) .then(() -> { body.assertWasSubscribed(); body.emit(buffer); }) .expectErrorSatisfies(throwable -> { assertTrue(throwable instanceof UnsupportedMediaTypeException); try { buffer.release(); Assert.fail("releasing the buffer should have failed"); } catch (IllegalReferenceCountException exc) { } body.assertCancelled(); }).verify(); }