| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| library quiver.iterables.partition_test; |
| |
| import 'package:test/test.dart'; |
| import 'package:quiver/iterables.dart'; |
| |
| main() { |
| group('partition', () { |
| test('should throw when size is <= 0', () { |
| expect(() => partition([1, 2, 3], 0), throwsArgumentError); |
| expect(() => partition([1, 2, 3], -1), throwsArgumentError); |
| }); |
| |
| test('should return an empty list for empty input iterable', () { |
| expect(partition([], 5), equals([])); |
| }); |
| |
| test('should return one partition if partition size < input size', () { |
| var it = partition([1, 2, 3], 5).iterator; |
| expect(it.moveNext(), isTrue); |
| expect(it.current, equals([1, 2, 3])); |
| expect(it.moveNext(), isFalse); |
| expect(it.current, isNull); |
| }); |
| |
| test('should return one partition if partition size == input size', () { |
| var it = partition([1, 2, 3, 4, 5], 5).iterator; |
| expect(it.moveNext(), isTrue); |
| expect(it.current, equals([1, 2, 3, 4, 5])); |
| expect(it.moveNext(), isFalse); |
| expect(it.current, isNull); |
| }); |
| |
| test( |
| 'should return partitions of correct size if ' |
| 'partition size > input size', () { |
| var it = partition([1, 2, 3, 4, 5], 3).iterator; |
| expect(it.moveNext(), isTrue); |
| expect(it.current, equals([1, 2, 3])); |
| expect(it.moveNext(), isTrue); |
| expect(it.current, equals([4, 5])); |
| expect(it.moveNext(), isFalse); |
| expect(it.current, isNull); |
| }); |
| }); |
| } |