lrn@google.com
3f1780f70d
This allows using the .from constructor as a cast: new Set<int>.from(numSetContainingOnlyInts); BUG= http://dartbug.com/21731 R=sgjesse@google.com Review URL: https://codereview.chromium.org//838463002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@42620 260f80e4-7a28-3924-810f-c04153c831b5
96 lines
2.6 KiB
Dart
96 lines
2.6 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Dart test for Splaytrees.
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library splay_tree_test;
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import "package:expect/expect.dart";
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import 'dart:collection';
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main() {
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// Simple tests.
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SplayTreeMap tree = new SplayTreeMap();
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tree[1] = "first";
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tree[3] = "third";
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tree[5] = "fifth";
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tree[2] = "second";
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tree[4] = "fourth";
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var correctSolution = ["first", "second", "third", "fourth", "fifth"];
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tree.forEach((key, value) {
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Expect.equals(true, key >= 1);
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Expect.equals(true, key <= 5);
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Expect.equals(value, correctSolution[key - 1]);
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});
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for (var v in ["first", "second", "third", "fourth", "fifth"]) {
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Expect.isTrue(tree.containsValue(v));
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};
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Expect.isFalse(tree.containsValue("sixth"));
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tree[7] = "seventh";
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Expect.equals(1, tree.firstKey());
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Expect.equals(7, tree.lastKey());
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Expect.equals(2, tree.lastKeyBefore(3));
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Expect.equals(4, tree.firstKeyAfter(3));
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Expect.equals(null, tree.lastKeyBefore(1));
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Expect.equals(2, tree.firstKeyAfter(1));
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Expect.equals(4, tree.lastKeyBefore(5));
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Expect.equals(7, tree.firstKeyAfter(5));
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Expect.equals(5, tree.lastKeyBefore(7));
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Expect.equals(null, tree.firstKeyAfter(7));
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Expect.equals(5, tree.lastKeyBefore(6));
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Expect.equals(7, tree.firstKeyAfter(6));
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testSetFrom();
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regressRemoveWhere();
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regressRemoveWhere2();
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}
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void regressRemoveWhere() {
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// Regression test. Fix in https://codereview.chromium.org/148523006/
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var t = new SplayTreeSet();
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t.addAll([1, 3, 5, 7, 2, 4, 6, 8, 0]);
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var seen = new List<bool>.filled(9, false);
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t.removeWhere((x) {
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// Called only once per element.
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Expect.isFalse(seen[x], "seen $x");
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seen[x] = true;
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return x.isOdd;
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});
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}
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void regressRemoveWhere2() {
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// Regression test for http://dartbug.com/18676
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// Removing all elements with removeWhere causes error.
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var t = new SplayTreeSet();
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t.addAll([1, 2, 3, 4, 5]);
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t.removeWhere((_) => true); // Should not throw.
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Expect.isTrue(t.isEmpty);
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t.addAll([1, 2, 3, 4, 5]);
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t.retainWhere((_) => false); // Should not throw.
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Expect.isTrue(t.isEmpty);
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}
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void testSetFrom() {
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var set1 = new SplayTreeSet<num>()..addAll([1, 2, 3, 4, 5]);
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var set2 = new SplayTreeSet<int>.from(set1);
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Expect.equals(5, set2.length);
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for (int i = 1; i <= 5; i++) {
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Expect.isTrue(set2.contains(i));
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}
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set1 = new SplayTreeSet<num>()..addAll([0, 1, 2.4, 3.14, 5]);
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set2 = new SplayTreeSet<int>.from(set1.where((x) => x is int));
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Expect.equals(3, set2.length);
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}
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