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Side by Side Diff: frog/tests/leg_only/for_in_test.dart

Issue 10536169: Move frog/tests/{leg,leg_only,frog_native} to tests/compiler/. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 8 years, 6 months ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4
5 // Test foreach (aka. for-in) functionality.
6
7 testIterator(List expect, Iterable input) {
8 int i = 0;
9 for (var value in input) {
10 Expect.isTrue(i < expect.length);
11 Expect.equals(expect[i], value);
12 i += 1;
13 }
14 Expect.equals(expect.length, i);
15
16 i = 0;
17 var value2;
18 for (value2 in input) {
19 Expect.isTrue(i < expect.length);
20 Expect.equals(expect[i], value2);
21 i += 1;
22 }
23 Expect.equals(expect.length, i);
24 }
25
26 class MyIterable<T> implements Iterable<T> {
27 final List<T> values;
28 MyIterable(List<T> values) : this.values = values;
29 Iterator iterator() {
30 return new MyListIterator(values);
31 }
32 }
33
34 class MyListIterator<T> implements Iterator<T> {
35 final List<T> values;
36 int index;
37 MyListIterator(List<T> values) : this.values = values, index = 0;
38 bool hasNext() => index < values.length;
39 T next() => values[index++];
40 }
41
42 void main() {
43 testIterator([], []);
44 testIterator([], new MyIterable([]));
45 testIterator([1], [1]);
46 testIterator([1], new MyIterable([1]));
47 testIterator([1,2,3], [1,2,3]);
48 testIterator([1,2,3], new MyIterable([1,2,3]));
49 testIterator(["a","b","c"], ["a","b","c"]);
50 testIterator(["a","b","c"], new MyIterable(["a","b","c"]));
51
52 // Several nested for-in's.
53 for (var x in [[["a"]]]) {
54 for (var y in x) {
55 for (var z in y) {
56 Expect.equals("a", z);
57 }
58 }
59 }
60
61 // Simultaneous iteration of the same iterable.
62 for (var iterable in [[1,2,3], new MyIterable([1,2,3])]) {
63 int result = 0;
64 for (var x in iterable) {
65 for (var y in iterable) {
66 result += x * y;
67 }
68 }
69 Expect.equals(36, result);
70 }
71
72 // Using the same variable (showing that the expression is evaluated
73 // in the outer scope).
74 int result = 0;
75 var x = [1,2,3];
76 for (var x in x) {
77 result += x;
78 }
79 Expect.equals(6, result);
80 }
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