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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.count_test; | |
16 | |
17 import 'package:test/test.dart'; | |
18 import 'package:quiver_iterables/iterables.dart'; | |
19 | |
20 main() { | |
21 group('count', () { | |
22 test("should create an infinite sequence starting at 0 given no args", () { | |
23 expect(count().first, 0); | |
24 expect(count().take(5), [0, 1, 2, 3, 4]); | |
25 }); | |
26 | |
27 test("should create an infinite sequence starting from start", () { | |
28 expect(count(3).first, 3); | |
29 expect(count(3).take(5), [3, 4, 5, 6, 7]); | |
30 }); | |
31 | |
32 test("should create an infinite sequence stepping by step", () { | |
33 expect(count(3, 2).first, 3); | |
34 expect(count(3, 2).take(5), [3, 5, 7, 9, 11]); | |
35 expect(count(3.5, 2).first, 3.5); | |
36 expect(count(3.5, .5).take(5), [3.5, 4, 4.5, 5, 5.5]); | |
37 }); | |
38 }); | |
39 } | |
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