LibTest/collection/DoubleLinkedQueue/skipWhile_A04_t01.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 Iterable<E> skipWhile(bool test(E value))
 * As long as the iterator's elements do not satisfy test they are discarded.
 * Once an element does not satisfy the test the iterator stops testing and uses
 * every element unconditionally.
 * @description Checks that once an element does not satisfy the test,
 * the iterator stops testing and uses every element unconditionally.
 * @author kaigorodov
 */

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

void check(List a0, bool test0(var element)) {
  DoubleLinkedQueue queue = new DoubleLinkedQueue.from(a0);
  bool testPassed=null;
  bool test(var element) {
    Expect.isTrue(testPassed==null || testPassed, "testPassed=$testPassed for element=$element");
    return testPassed=!test0(element);
  }
  for (var element in queue.skipWhile(test)) {
    Expect.isTrue(testPassed==null || !testPassed);
  }  
}

main() {
  List a0=[1,3,7,4,5,6];
  check(a0, (var element)=>element==1);
  check(a0, (var element)=>true);
  check(a0, (var element)=>false);
  check(a0, (var element)=>element>4);
  check(a0, (var element)=>element<4);
  check(a0, (var element)=>element==4);
}