| // Copyright (c) 2017, 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 E singleWhere(bool test(E element)) |
| /// ... |
| /// Checks all elements to see if test(element) returns true. If exactly one |
| /// element satisfies test, that element is returned. Otherwise, if there are |
| /// no matching elements, or if there is more than one matching element, a |
| /// StateError is thrown. |
| /// @description Checks that a StateError is thrown, if there are no matching |
| /// elements, or if there is more than one matching element. |
| /// @author ngl@unipro.ru |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Float64x2 f64x2(v) => new Float64x2.splat(v); |
| |
| listEquals(Float64x2List expected, Float64x2List actual) { |
| Expect.equals(expected.length, actual.length); |
| for (int i = 0; i < expected.length; ++i) { |
| Expect.equals(expected[i].x, actual[i].x); |
| Expect.equals(expected[i].y, actual[i].y); |
| } |
| } |
| |
| main() { |
| var l = new Float64x2List.fromList([ |
| f64x2(1.0), f64x2(2.0), f64x2(2.0), f64x2(3.0), f64x2(4.0,), f64x2(5.0) |
| ]); |
| |
| try { |
| l.singleWhere((e) => e.x > 5.0); |
| Expect.fail("State error is expected"); |
| } on StateError {} |
| |
| try { |
| l.singleWhere((e) => e.y == 2.0); |
| Expect.fail("State error is expected"); |
| } on StateError {} |
| } |