/// This call should block until filesystem confirms that all buffers have
  /// been flushed and persisted.
  ///
  /// DEFAULT IMPLEMENTATION: No op.
  void (*sync)(const TF_WritableFile* file, TF_Status* status);

  /// Closes `*file`.
  ///
  /// Flushes all buffers and deallocates all resources.
  ///
  /// Calling `close` must not result in calling `cleanup`.
  ///
  /// Core TensorFlow will never call `close` twice.

    assertFailsWith<IOException> {
      out.writeUtf8("square")
      out.flush()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("stream was reset: CANCEL")
    }
    // Close throws because buffered data wasn't flushed.
    assertFailsWith<IOException> {
      out.close()
    }
    assertThat(connection.openStreamCount()).isEqualTo(0)

			fmt.Fprintf(os.Stderr, "testing: can't write %s: %s\n", *testlog, err)
			os.Exit(2)
		}
	}
	if *cpuProfile != "" {
		m.deps.StopCPUProfile() // flushes profile to disk
	}
	if *traceFile != "" {
		trace.Stop() // flushes trace to disk
	}
	if *memProfile != "" {
		f, err := os.Create(toOutputDir(*memProfile))
		if err != nil {
			fmt.Fprintf(os.Stderr, "testing: %s\n", err)

//     the finalizers.
//  4. (if not all removals succeeded) flush Job status again.
//
// Returns whether there are pending changes in the Job status that need to be
// flushed in subsequent calls.

	FF1                           = 0x2000
	FFDLY                         = 0x2000
	FLUSHBAND                     = 0x40
	FLUSHLOW                      = 0x8
	FLUSHO                        = 0x100000
	FLUSHR                        = 0x1
	FLUSHRW                       = 0x3
	FLUSHW                        = 0x2
	F_CLOSEM                      = 0xa
	F_DUP2FD                      = 0xe
	F_DUPFD                       = 0x0

	FF1                           = 0x2000
	FFDLY                         = 0x2000
	FLUSHBAND                     = 0x40
	FLUSHLOW                      = 0x8
	FLUSHO                        = 0x100000
	FLUSHR                        = 0x1
	FLUSHRW                       = 0x3
	FLUSHW                        = 0x2
	F_CLOSEM                      = 0xa
	F_DUP2FD                      = 0xe
	F_DUPFD                       = 0x0

		// both the h1 and h2 Server's write buffers. For h1,
		// sendfile is used, though, forcing a header flush at
		// the io.Copy. http2 doesn't do a header flush so
		// buffers all 11 bytes and then adds its own
		// Content-Length. To prevent the Server's
		// Content-Length and test ServeFile only, flush here.
		w.(Flusher).Flush()
	}))
	resp, err := cst.c.Get(cst.ts.URL)
	if err != nil {
		t.Fatal(err)
	}

func testStreamingGet(t *testing.T, mode testMode) {
	say := make(chan string)
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		w.(Flusher).Flush()
		for str := range say {
			w.Write([]byte(str))
			w.(Flusher).Flush()
		}
	}))

	c := cst.c
	res, err := c.Get(cst.ts.URL)
	if err != nil {
		t.Fatal(err)
	}
	var buf [10]byte

//                    other platforms, including Windows.
//
// Logging:
//   GTEST_LOG_()   - logs messages at the specified severity level.
//   LogToStderr()  - directs all log messages to stderr.
//   FlushInfoLog() - flushes informational log messages.
//
// Stdout and stderr capturing:
//   CaptureStdout()     - starts capturing stdout.
//   GetCapturedStdout() - stops capturing stdout and returns the captured

//                    other platforms, including Windows.
//
// Logging:
//   GTEST_LOG_()   - logs messages at the specified severity level.
//   LogToStderr()  - directs all log messages to stderr.
//   FlushInfoLog() - flushes informational log messages.
//
// Stdout and stderr capturing:
//   CaptureStdout()     - starts capturing stdout.
//   GetCapturedStdout() - stops capturing stdout and returns the captured