| // Copyright (c) 2013, 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 'package:expect/expect.dart'; |
| import 'dart:collection'; |
| |
| class MyList extends ListBase { |
| List list; |
| MyList(this.list); |
| |
| get length => list.length; |
| set length(val) { |
| list.length = val; |
| } |
| |
| operator [](index) => list[index]; |
| operator []=(index, val) => list[index] = val; |
| |
| String toString() => "[" + join(", ") + "]"; |
| } |
| |
| // l1 must be a modifiable list with 5 elements from 0 to 4. |
| void testModifiableList(l1) { |
| // Index must be integer and in range. |
| Expect.throwsRangeError(() => l1.insert(-1, 5), "negative"); |
| Expect.throwsRangeError(() => l1.insert(6, 5), "too large"); |
| Expect.throws(() => l1.insert(null, 5)); |
| Expect.throws(() => l1.insert("1", 5)); |
| Expect.throws(() => l1.insert(1.5, 5)); |
| |
| l1.insert(5, 5); |
| Expect.equals(6, l1.length); |
| Expect.equals(5, l1[5]); |
| Expect.equals("[0, 1, 2, 3, 4, 5]", l1.toString()); |
| |
| l1.insert(0, -1); |
| Expect.equals(7, l1.length); |
| Expect.equals(-1, l1[0]); |
| Expect.equals("[-1, 0, 1, 2, 3, 4, 5]", l1.toString()); |
| } |
| |
| void main() { |
| // Normal modifiable list. |
| testModifiableList([0, 1, 2, 3, 4]); |
| testModifiableList(new MyList([0, 1, 2, 3, 4])); |
| |
| // Fixed size list. |
| var l2 = new List<int?>.filled(5, null); |
| for (var i = 0; i < 5; i++) l2[i] = i; |
| Expect.throwsUnsupportedError(() => l2.insert(2, 5), "fixed-length"); |
| |
| // Unmodifiable list. |
| var l3 = const [0, 1, 2, 3, 4]; |
| Expect.throwsUnsupportedError(() => l3.insert(2, 5), "unmodifiable"); |
| |
| // Empty list is not special. |
| var l4 = []; |
| l4.insert(0, 499); |
| Expect.equals(1, l4.length); |
| Expect.equals(499, l4[0]); |
| } |