LibTest/core/List/getRange_A01_t01.test.dart

// 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  abstract Iterable<E> getRange(int start, int end)
/// Returns an Iterable that iterators over the elements in the range start to
/// end exclusive. The result of this function is backed by this.
/// @description Checks lists with valid ranges.
/// @author vasya

library getRange_A01_t01;

import "../../../Utils/expect.dart";

test(List<E> create<E>([int length, E fill])) {

  void check(List src, int start, int length) {
    List a = create();
    a.addAll(src);
    Iterator dst = a.getRange(start, start+length).iterator;
    for(int i = 0; dst.moveNext(); i++) {
      Expect.equals(a[i+start], dst.current);
      Expect.identical(a[i+start], dst.current);
    }
  }

  List l = new List.filled(100, 0);
  for (var i = 0; i < l.length; i++){
    l[i] = i;
  }
  check(l, 0, 100);
  check(l, 0, 1);
  check(l, 99, 1);
  check(l, 90, 9);

  l = [];
  for (var i = 0; i < 100; i++){
    l.add(i);
  }
  check(l, 0, 100);
  check(l, 0, 1);
  check(l, 99, 1);
  check(l, 90, 9);

  l = new List.from([]);
  for (var i = 0; i < 100; i++){
    l.add(i);
  }
  check(l, 0, 100);
  check(l, 0, 1);
  check(l, 99, 1);
  check(l, 90, 9);
}