source: trip-planner-front/node_modules/hdr-histogram-js/src/packedarray/PackedArray.spec.ts@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1/*
2 * This is a TypeScript port of the original Java version, which was written by
3 * Gil Tene as described in
4 * https://github.com/HdrHistogram/HdrHistogram
5 * and released to the public domain, as explained at
6 * http://creativecommons.org/publicdomain/zero/1.0/
7 */
8import { PackedArrayContext } from "./PackedArrayContext";
9import { PackedArray } from "./PackedArray";
10
11const { pow } = Math;
12
13describe("Packed array context", () => {
14 it("Should initialize array", () => {
15 const ctx = new PackedArrayContext(1024, 128);
16 expect(ctx.isPacked).toBe(true);
17 expect(ctx.getPopulatedShortLength()).toBeGreaterThan(0);
18 });
19});
20
21describe("Packed array", () => {
22 it("Should initialize array", () => {
23 const array = new PackedArray(1024, 128);
24 expect(array.getPhysicalLength()).toBe(128);
25 expect(array.length()).toBe(1024);
26 });
27
28 it("Should retrieve data stored in array", () => {
29 // given
30 const array = new PackedArray(1024, 16);
31
32 // when
33 array.set(16, 1);
34 array.set(12, 42);
35
36 // then
37 expect(array.get(12)).toBe(42);
38 expect(array.get(16)).toBe(1);
39 });
40
41 it("Should resize array when storing data", () => {
42 // given
43 const array = new PackedArray(1024, 16);
44
45 // when
46 array.set(12, 361);
47
48 // then
49 const storedData = array.get(12);
50 expect(storedData).toBe(361);
51 });
52
53 it("Should retrieve big numbers stored in array", () => {
54 // given
55 const array = new PackedArray(1024, 16);
56
57 // when
58 array.set(12, Math.pow(2, 16) + 1);
59
60 // then
61 const storedData = array.get(12);
62 expect(storedData).toBe(Math.pow(2, 16) + 1);
63 });
64
65 it("Should copy data when resizing array", () => {
66 const array = new PackedArray(1024);
67 for (let value = 1; value <= 272; value++) {
68 array.set(value, value);
69 }
70
71 expect(array.get(1)).toBe(1);
72 expect(array.get(255)).toBe(255);
73 expect(array.get(272)).toBe(272);
74 });
75
76 it("Should increment data stored in array", () => {
77 // given
78 const array = new PackedArray(1024, 16);
79 array.set(16, 1);
80
81 // when
82 array.add(16, 41);
83
84 // then
85 expect(array.get(16)).toBe(42);
86 });
87
88 it("Should increment data stored in array with big numbers", () => {
89 // given
90 const array = new PackedArray(1024, 16);
91 array.set(16, 42);
92
93 // when
94 array.add(16, pow(2, 33));
95
96 // then
97 expect(array.get(16)).toBe(pow(2, 33) + 42);
98 });
99
100 it("Should increment data stored in array with big numbers when a resize is needed", () => {
101 // given
102 const array = new PackedArray(10000, 16);
103 array.set(6144, 243);
104 array.set(60, 243);
105 array.set(1160, 243);
106
107 // when
108 array.add(6144, 25);
109
110 // then
111 expect(array.get(6144)).toBe(268);
112 });
113
114 it("Should increment data stored in array with big numbers", () => {
115 // given
116 const array = new PackedArray(1024, 16);
117 array.set(16, 42);
118
119 // when
120 array.add(16, pow(2, 33));
121
122 // then
123 expect(array.get(16)).toBe(pow(2, 33) + 42);
124 });
125
126 it("Should clear data stored in array", () => {
127 // given
128 const array = new PackedArray(1024, 16);
129 array.set(16, 42);
130
131 // when
132 array.clear();
133
134 // then
135 expect(array.get(16)).toBe(0);
136 });
137
138 it("Should resize array when virtual length change", () => {
139 // given
140 const array = new PackedArray(16, 16);
141 array.set(7, 42);
142
143 // when
144 array.setVirtualLength(pow(2, 20));
145 array.add(pow(2, 19), 42);
146
147 // then
148 expect(array.get(7)).toBe(42);
149 expect(array.get(pow(2, 19))).toBe(42);
150 });
151
152 it("should handle properly big numbers", () => {
153 // given
154 const array = new PackedArray(45056, 16);
155 // when
156 array.set(32768, 1);
157 // then
158 expect(array.get(32768)).toBe(1);
159 expect(array.get(0)).toBe(0);
160 });
161});
162
163describe("Unpacked array", () => {
164 it("Should increment data stored in array", () => {
165 // given
166 const array = new PackedArray(1024, pow(2, 20));
167 array.set(16, 1);
168
169 // when
170 array.add(16, 41);
171
172 // then
173 expect(array.get(16)).toBe(42);
174 });
175});
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