LibTest/core/Iterable/any_A01_t05.test.dart

// Copyright (c) 2016, 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 bool any(bool f(E element))
/// Checks whether any element of this iterable satisfies test.
/// Checks every element in iteration order, and returns true if any of them make
/// test return true, otherwise returns false.
/// @description Checks that method is called for each element until the first
/// true result
/// @author pagolubev
/// @author sgrekhov@unipro.ru

library any_A01_t05;
import "../../../Utils/expect.dart";

//Checks that [some] calls [tst] a [count] number of times
check(Iterable a, bool tst(var e), int count) {
  int actualCount = 0;
  a.any((var e) {
    actualCount++;
    return tst(e);
  });
  Expect.equals(count, actualCount);
}

test(Iterable create([Iterable content])) {
  Iterable s = create([1, 2, 3, 4, 5]);

  bool allTrue(var e) {
    return true;
  }
  check(s, allTrue, 1);

  bool allFalse(var e) {
    return false;
  }
  check(s, allFalse, 5);

  bool greaterThan3(var e) {
    return e > 3;
  }
  check(s, greaterThan3, 4);
}