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1 // Copyright 2014 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.partition_test; | |
16 | |
17 import 'package:test/test.dart'; | |
18 import 'package:quiver_iterables/iterables.dart'; | |
19 | |
20 main() { | |
21 group('partition', () { | |
22 test('should throw when size is <= 0', () { | |
23 expect(() => partition([1, 2, 3], 0), throwsArgumentError); | |
24 expect(() => partition([1, 2, 3], -1), throwsArgumentError); | |
25 }); | |
26 | |
27 test('should return an empty list for empty input iterable', () { | |
28 expect(partition([], 5), equals([])); | |
29 }); | |
30 | |
31 test('should return one partition if partition size < input size', () { | |
32 var it = partition([1, 2, 3], 5).iterator; | |
33 expect(it.moveNext(), isTrue); | |
34 expect(it.current, equals([1, 2, 3])); | |
35 expect(it.moveNext(), isFalse); | |
36 expect(it.current, isNull); | |
37 }); | |
38 | |
39 test('should return one partition if partition size == input size', () { | |
40 var it = partition([1, 2, 3, 4, 5], 5).iterator; | |
41 expect(it.moveNext(), isTrue); | |
42 expect(it.current, equals([1, 2, 3, 4, 5])); | |
43 expect(it.moveNext(), isFalse); | |
44 expect(it.current, isNull); | |
45 }); | |
46 | |
47 test( | |
48 'should return partitions of correct size if ' | |
49 'partition size > input size', () { | |
50 var it = partition([1, 2, 3, 4, 5], 3).iterator; | |
51 expect(it.moveNext(), isTrue); | |
52 expect(it.current, equals([1, 2, 3])); | |
53 expect(it.moveNext(), isTrue); | |
54 expect(it.current, equals([4, 5])); | |
55 expect(it.moveNext(), isFalse); | |
56 expect(it.current, isNull); | |
57 }); | |
58 }); | |
59 } | |
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