blob: 4c25fbc2c50edc301ee1ad21c3386b100b3e04cd [file] [log] [blame]
// 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.
// @dart = 2.9
library collection.from.test;
import "package:expect/expect.dart";
import 'dart:collection';
main() {
for (Iterable<num> elements in [
new Set<num>(),
const <num>[],
const <num, int>{}.keys,
const <int, num>{}.values,
new Iterable<num>.generate(0),
new Set<num>()..add(1)..add(2)..add(4),
<num>[1, 2, 4],
new Iterable<num>.generate(3, (i) => [1, 2, 4][i]),
const <num>[1, 2, 4],
const <num, int>{1: 0, 2: 0, 4: 0}.keys,
const <int, num>{1: 1, 2: 2, 4: 4}.values,
]) {
int elementCount = elements.length;
check(elements, new List<num>.from(elements));
check(elements, new List<int>.from(elements));
check(elements, new List<Object>.from(elements));
check(elements, new List<num>.from(elements, growable: true));
check(elements, new List<int>.from(elements, growable: true));
check(elements, new List<Object>.from(elements, growable: true));
check(elements, new List<num>.from(elements, growable: false));
check(elements, new List<int>.from(elements, growable: false));
check(elements, new List<Object>.from(elements, growable: false));
check(elements, new Queue<num>.from(elements));
check(elements, new Queue<int>.from(elements));
check(elements, new Queue<Object>.from(elements));
check(elements, new ListQueue<num>.from(elements));
check(elements, new ListQueue<int>.from(elements));
check(elements, new ListQueue<Object>.from(elements));
check(elements, new DoubleLinkedQueue<num>.from(elements));
check(elements, new DoubleLinkedQueue<int>.from(elements));
check(elements, new DoubleLinkedQueue<Object>.from(elements));
check(elements, new Set<num>.from(elements));
check(elements, new Set<int>.from(elements));
check(elements, new Set<Object>.from(elements));
check(elements, new HashSet<num>.from(elements));
check(elements, new HashSet<int>.from(elements));
check(elements, new HashSet<Object>.from(elements));
check(elements, new LinkedHashSet<num>.from(elements));
check(elements, new LinkedHashSet<int>.from(elements));
check(elements, new LinkedHashSet<Object>.from(elements));
check(elements, new SplayTreeSet<num>.from(elements));
check(elements, new SplayTreeSet<int>.from(elements));
check(elements, new SplayTreeSet<Object>.from(elements));
// Sanity check that elements didn't change.
Expect.equals(elementCount, elements.length);
// Lists may be growable or not growable.
var list = new List<num>.from(elements, growable: true);
Expect.equals(elementCount, list.length);
Expect.equals(elementCount + 1, list.length);
var list = new List<num>.from(elements);
Expect.equals(elementCount, list.length);
Expect.equals(elementCount + 1, list.length);
var list = new List<num>.from(elements, growable: false);
Expect.equals(elementCount, list.length);
Expect.throwsUnsupportedError(() {
Expect.equals(elementCount, list.length);
void check(Iterable<num> initial, Iterable other) {
Expect.equals(initial.length, other.length);
for (var element in other) {
for (var element in initial) {