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Side by Side Diff: packages/quiver_iterables/test/range_test.dart

Issue 2989763002: Update charted to 0.4.8 and roll (Closed)
Patch Set: Removed Cutch from list of reviewers Created 3 years, 4 months ago
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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.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 }
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