// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion Stream<T> skip(int count)
/// Skips the first count data events from this stream.
/// @description Checks that the first n elements are skipped.
/// @author kaigorodov

import "dart:async";
import "../../../Utils/expect.dart";
import "IsolateStream.dart" as IsolateStream;

void check(List data, int count) {
  Stream s = IsolateStream.fromIterable(data);
  Stream t = s.skip(count);
  int seen = 0;
  asyncStart();
  t.listen((value) {
    Expect.isTrue(seen + count < data.length, "seen=$seen, count=$count");
    var expected = data[count + seen];
    Expect.deepEquals(expected, value, "$expected!=$value");
    seen++;
  }, onDone: () {
    asyncEnd();
  });
}

main() {
  check([], 0);
  check([], 1);
  check([], 10);
  check([null], 0);
  check([null], 1);
  check([null], 2);
  check([1, 2, 3], 0);
  check([1, 2, 3], 1);
  check([1, 2, 3], 2);
  check([1, 2, 3], 12);
  check([11, 22, []], 2);
  check([
    [],
    [[]],
    [
      [[]]
    ]
  ], 2);
}