| // Copyright 2013 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.concat_test; |
| |
| import 'package:test/test.dart'; |
| import 'package:quiver_iterables/iterables.dart'; |
| |
| main() { |
| group('concat', () { |
| test('should handle empty input iterables', () { |
| expect(concat([]), isEmpty); |
| }); |
| |
| test('should handle single input iterables', () { |
| expect( |
| concat([ |
| [1, 2, 3] |
| ]), |
| [1, 2, 3]); |
| }); |
| |
| test('should chain multiple input iterables', () { |
| expect( |
| concat([ |
| [1, 2, 3], |
| [-1, -2, -3] |
| ]), |
| [1, 2, 3, -1, -2, -3]); |
| }); |
| |
| test('should throw for null input', () { |
| expect(() => concat(null), throws); |
| }); |
| |
| test('should throw if any input is null', () { |
| expect( |
| () => concat([ |
| [1, 2], |
| null, |
| [3, 4] |
| ]).toList(), |
| throws); |
| }); |
| |
| test('should reflectchanges in the inputs', () { |
| var a = [1, 2]; |
| var b = [4, 5]; |
| var ab = concat([a, b]); |
| expect(ab, [1, 2, 4, 5]); |
| a.add(3); |
| b.add(6); |
| expect(ab, [1, 2, 3, 4, 5, 6]); |
| }); |
| }); |
| } |