mirror of
https://github.com/dart-lang/sdk
synced 2024-09-16 03:27:43 +00:00
654b725ee4
Also splits up cast_test to test collections separately and updates corelib_2 version with the same changes, including fixes in relevant pending CL: https://dart-review.googlesource.com/c/sdk/+/126320 Fixes #39517 Bug: http://dartbug.com/39517 Change-Id: I8df1fde1d48ed23561ce9d0d8b87d7fc2ba52eb1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144469 Commit-Queue: Riley Porter <rileyporter@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Reviewed-by: Bob Nystrom <rnystrom@google.com>
72 lines
2 KiB
Dart
72 lines
2 KiB
Dart
// Copyright (c) 2020, 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.
|
|
|
|
import "dart:collection";
|
|
import "package:expect/expect.dart";
|
|
import 'cast_helper.dart';
|
|
|
|
void main() {
|
|
testOrder();
|
|
testDowncast();
|
|
testUpcast();
|
|
testNewSet();
|
|
}
|
|
|
|
void testOrder() {
|
|
var setEls = new Set<C?>.from(elements); // Linked HashSet.
|
|
Expect.listEquals(elements, setEls.toList()); // Preserves order.
|
|
}
|
|
|
|
void testDowncast() {
|
|
var setEls = new Set<C?>.from(elements);
|
|
var dSet = Set.castFrom<C?, D?>(setEls);
|
|
|
|
// Preserves order.
|
|
Expect.throws(() => dSet.first); // C is not D?.
|
|
Expect.equals(d, dSet.elementAt(1));
|
|
Expect.throws(() => dSet.elementAt(2)); // E is not D?.
|
|
Expect.equals(f, dSet.elementAt(3));
|
|
Expect.equals(null, dSet.elementAt(4));
|
|
|
|
Expect.throws(() => dSet.toList());
|
|
|
|
// Contains should not be typed.
|
|
var newC = new C();
|
|
Expect.isFalse(dSet.contains(newC));
|
|
Expect.isTrue(dSet.contains(c));
|
|
|
|
// Remove and length should not be typed.
|
|
Expect.equals(5, dSet.length);
|
|
dSet.remove(c); // Success, no type checks.
|
|
Expect.equals(4, dSet.length);
|
|
}
|
|
|
|
void testUpcast() {
|
|
var setEls = new Set<C?>.from(elements);
|
|
var objectSet = Set.castFrom<C?, Object?>(setEls);
|
|
|
|
Expect.listEquals(elements, objectSet.toList());
|
|
|
|
var newObject = new Object();
|
|
Expect.throws(() => objectSet.add(newObject));
|
|
Expect.isFalse(objectSet.contains(newObject));
|
|
|
|
var toSet = objectSet.toSet();
|
|
Expect.isTrue(toSet is LinkedHashSet<Object?>);
|
|
Expect.isFalse(toSet is LinkedHashSet<C?>);
|
|
}
|
|
|
|
void testNewSet() {
|
|
// Specified custom newSet as empty HashSet.
|
|
var setEls = new Set<C?>.from(elements);
|
|
var customNewSet;
|
|
var objectSet2 = Set.castFrom<C?, Object?>(setEls,
|
|
newSet: <T>() => customNewSet = new HashSet<T>());
|
|
|
|
var customToSet = objectSet2.toSet();
|
|
Expect.isTrue(customToSet is HashSet<Object?>);
|
|
Expect.isFalse(customToSet is HashSet<C?>);
|
|
Expect.identical(customToSet, customNewSet);
|
|
}
|