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"use strict";

var CC = Components.Constructor;

const StreamCopier = CC(
  "@mozilla.org/network/async-stream-copier;1",
  "nsIAsyncStreamCopier",
  "init"
);

const ScriptableInputStream = CC(
  "@mozilla.org/scriptableinputstream;1",
  "nsIScriptableInputStream",
  "init"
);

const Pipe = CC("@mozilla.org/pipe;1", "nsIPipe", "init");

var pipe1;
var pipe2;
var copier;
var test_result;
var test_content;
var test_source_closed;
var test_sink_closed;
var test_nr;

var copyObserver = {
  onStartRequest() {},

  onStopRequest(request, statusCode) {
    // check status code
    Assert.equal(statusCode, test_result);

    // check number of copied bytes
    Assert.equal(pipe2.inputStream.available(), test_content.length);

    // check content
    var scinp = new ScriptableInputStream(pipe2.inputStream);
    var content = scinp.read(scinp.available());
    Assert.equal(content, test_content);

    // check closed sink
    try {
      pipe2.outputStream.write("closedSinkTest", 14);
      Assert.ok(!test_sink_closed);
    } catch (ex) {
      Assert.ok(test_sink_closed);
    }

    // check closed source
    try {
      pipe1.outputStream.write("closedSourceTest", 16);
      Assert.ok(!test_source_closed);
    } catch (ex) {
      Assert.ok(test_source_closed);
    }

    do_timeout(0, do_test);
  },

  QueryInterface: ChromeUtils.generateQI(["nsIRequestObserver"]),
};

function startCopier(closeSource, closeSink) {
  pipe1 = new Pipe(
    true /* nonBlockingInput */,
    true /* nonBlockingOutput */,
    0 /* segmentSize */,
    0xffffffff /* segmentCount */,
    null /* segmentAllocator */
  );

  pipe2 = new Pipe(
    true /* nonBlockingInput */,
    true /* nonBlockingOutput */,
    0 /* segmentSize */,
    0xffffffff /* segmentCount */,
    null /* segmentAllocator */
  );

  copier = new StreamCopier(
    pipe1.inputStream /* aSource */,
    pipe2.outputStream /* aSink */,
    null /* aTarget */,
    true /* aSourceBuffered */,
    true /* aSinkBuffered */,
    8192 /* aChunkSize */,
    closeSource /* aCloseSource */,
    closeSink /* aCloseSink */
  );

  copier.asyncCopy(copyObserver, null);
}

function do_test() {
  test_nr++;
  test_content = "test" + test_nr;

  switch (test_nr) {
    case 1:
    case 2: // close sink
    case 3: // close source
    case 4: // close both
      // test canceling transfer
      // use some undefined error code to check if it is successfully passed
      // to the request observer
      test_result = 0x87654321;

      test_source_closed = (test_nr - 1) >> 1 != 0;
      test_sink_closed = (test_nr - 1) % 2 != 0;

      startCopier(test_source_closed, test_sink_closed);
      pipe1.outputStream.write(test_content, test_content.length);
      pipe1.outputStream.flush();
      do_timeout(20, function () {
        copier.cancel(test_result);
        pipe1.outputStream.write("a", 1);
      });
      break;
    case 5:
    case 6: // close sink
    case 7: // close source
    case 8: // close both
      // test copying with EOF on source
      test_result = 0;

      test_source_closed = (test_nr - 5) >> 1 != 0;
      test_sink_closed = (test_nr - 5) % 2 != 0;

      startCopier(test_source_closed, test_sink_closed);
      pipe1.outputStream.write(test_content, test_content.length);
      // we will close the source
      test_source_closed = true;
      pipe1.outputStream.close();
      break;
    case 9:
    case 10: // close sink
    case 11: // close source
    case 12: // close both
      // test copying with error on sink
      // use some undefined error code to check if it is successfully passed
      // to the request observer
      test_result = 0x87654321;

      test_source_closed = (test_nr - 9) >> 1 != 0;
      test_sink_closed = (test_nr - 9) % 2 != 0;

      startCopier(test_source_closed, test_sink_closed);
      pipe1.outputStream.write(test_content, test_content.length);
      pipe1.outputStream.flush();
      // we will close the sink
      test_sink_closed = true;
      do_timeout(20, function () {
        pipe2.outputStream
          .QueryInterface(Ci.nsIAsyncOutputStream)
          .closeWithStatus(test_result);
        pipe1.outputStream.write("a", 1);
      });
      break;
    case 13:
      do_test_finished();
      break;
  }
}

function run_test() {
  test_nr = 0;
  do_timeout(0, do_test);
  do_test_pending();
}