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1// Copyright (C) 2018 The Android Open Source Project
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
15import {search, searchEq, searchRange, searchSegment} from './binary_search';
16
17test('binarySearch', () => {
18  expect(search(Float64Array.of(), 100)).toEqual(-1);
19  expect(search(Float64Array.of(42), 42)).toEqual(0);
20  expect(search(Float64Array.of(42), 43)).toEqual(0);
21  expect(search(Float64Array.of(42), 41)).toEqual(-1);
22  expect(search(Float64Array.of(42, 43), 42)).toEqual(0);
23  expect(search(Float64Array.of(42, 43), 43)).toEqual(1);
24  expect(search(Float64Array.of(42, 43), 44)).toEqual(1);
25  expect(search(Float64Array.of(42, 43, 44), 41)).toEqual(-1);
26  expect(search(Float64Array.of(42, 43, 44), 42)).toEqual(0);
27  expect(search(Float64Array.of(42, 43, 44), 43)).toEqual(1);
28  expect(search(Float64Array.of(42, 43, 44), 44)).toEqual(2);
29  expect(search(Float64Array.of(42, 43, 44), 45)).toEqual(2);
30});
31
32test('searchEq', () => {
33  expect(searchEq([], 100)).toEqual([0, 0]);
34  expect(searchEq([42], 41)).toEqual([0, 0]);
35  expect(searchEq([42], 42)).toEqual([0, 1]);
36  expect(searchEq([42], 43)).toEqual([1, 1]);
37  expect(searchEq([42, 44], 42)).toEqual([0, 1]);
38  expect(searchEq([42, 42], 42)).toEqual([0, 2]);
39  expect(searchEq([41, 43], 42)).toEqual([1, 1]);
40});
41
42test('searchRange', () => {
43  expect(searchRange([], 100)).toEqual([0, 0]);
44  expect(searchRange([42], 41)).toEqual([0, 0]);
45  expect(searchRange([42], 42)).toEqual([0, 1]);
46  expect(searchRange([42], 43)).toEqual([0, 1]);
47
48  expect(searchRange([39, 41], 38)).toEqual([0, 0]);
49  expect(searchRange([39, 41], 39)).toEqual([0, 1]);
50  expect(searchRange([39, 41], 40)).toEqual([0, 1]);
51  expect(searchRange([39, 41], 41)).toEqual([1, 2]);
52  expect(searchRange([39, 41], 42)).toEqual([1, 2]);
53
54  expect(searchRange([38, 40, 40, 40, 42], 39)).toEqual([0, 1]);
55  expect(searchRange([38, 40, 40, 40, 42], 40)).toEqual([1, 4]);
56  expect(searchRange([38, 40, 40, 40, 42], 41)).toEqual([3, 4]);
57});
58
59test('searchSegment', () => {
60  expect(searchSegment(Float64Array.of(), 100)).toEqual([-1, -1]);
61  expect(searchSegment(Float64Array.of(42), 41)).toEqual([-1, 0]);
62  expect(searchSegment(Float64Array.of(42), 42)).toEqual([0, -1]);
63  expect(searchSegment(Float64Array.of(42), 43)).toEqual([0, -1]);
64  expect(searchSegment(Float64Array.of(42, 44), 42)).toEqual([0, 1]);
65});
66