OLD | NEW |
| (Empty) |
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.range_test; | |
16 | |
17 import 'package:test/test.dart'; | |
18 import 'package:quiver_iterables/iterables.dart'; | |
19 | |
20 main() { | |
21 group('range', () { | |
22 test("should create an empty iterator if stop is 0", () { | |
23 expect(range(0), []); | |
24 }); | |
25 | |
26 test("should create a sequence from 0 to stop - 1", () { | |
27 expect(range(10), [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]); | |
28 }); | |
29 | |
30 test("should start sequences at start_or_stop", () { | |
31 expect(range(1, 11), [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]); | |
32 }); | |
33 | |
34 test("should create an empty iterator if start and stop are equal", () { | |
35 expect(range(1, 1), []); | |
36 }); | |
37 | |
38 test("should step by step", () { | |
39 expect(range(0, 10, 2), [0, 2, 4, 6, 8]); | |
40 expect(range(0, 10, 3), [0, 3, 6, 9]); | |
41 }); | |
42 | |
43 test("should step by a negative step", () { | |
44 expect(range(10, 0, -1), [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]); | |
45 expect(range(0, -8, -1), [0, -1, -2, -3, -4, -5, -6, -7]); | |
46 expect(range(0, -10, -3), [0, -3, -6, -9]); | |
47 }); | |
48 | |
49 test("should throw with a bad range", () { | |
50 expect(() => range(10, 0), throws); | |
51 }); | |
52 | |
53 test("should throw with a bad step", () { | |
54 expect(() => range(0, 10, -1), throws); | |
55 }); | |
56 }); | |
57 } | |
OLD | NEW |