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Side by Side Diff: packages/quiver_iterables/test/concat_test.dart

Issue 2989763002: Update charted to 0.4.8 and roll (Closed)
Patch Set: Removed Cutch from list of reviewers Created 3 years, 4 months ago
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1 // Copyright 2013 Google Inc. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 library quiver.iterables.concat_test;
16
17 import 'package:test/test.dart';
18 import 'package:quiver_iterables/iterables.dart';
19
20 main() {
21 group('concat', () {
22 test('should handle empty input iterables', () {
23 expect(concat([]), isEmpty);
24 });
25
26 test('should handle single input iterables', () {
27 expect(
28 concat([
29 [1, 2, 3]
30 ]),
31 [1, 2, 3]);
32 });
33
34 test('should chain multiple input iterables', () {
35 expect(
36 concat([
37 [1, 2, 3],
38 [-1, -2, -3]
39 ]),
40 [1, 2, 3, -1, -2, -3]);
41 });
42
43 test('should throw for null input', () {
44 expect(() => concat(null), throws);
45 });
46
47 test('should throw if any input is null', () {
48 expect(
49 () => concat([
50 [1, 2],
51 null,
52 [3, 4]
53 ]).toList(),
54 throws);
55 });
56
57 test('should reflectchanges in the inputs', () {
58 var a = [1, 2];
59 var b = [4, 5];
60 var ab = concat([a, b]);
61 expect(ab, [1, 2, 4, 5]);
62 a.add(3);
63 b.add(6);
64 expect(ab, [1, 2, 3, 4, 5, 6]);
65 });
66 });
67 }
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