source: trip-planner-front/node_modules/obuf/test/buffer-test.js@ ceaed42

Last change on this file since ceaed42 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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[6a3a178]1var assert = require('assert');
2var OffsetBuffer = require('../');
3
4describe('OffsetBuffer', function() {
5 var o;
6 beforeEach(function() {
7 o = new OffsetBuffer();
8 });
9
10 describe('.take()', function() {
11 it('should return empty buffer', function() {
12 var b = new Buffer('hello world');
13 o.push(b);
14 var r = o.take(0);
15 assert.equal(r.length, 0);
16 assert.equal(o.size, b.length);
17 });
18
19 it('should return the first buffer itself', function() {
20 var b = new Buffer('hello world');
21 o.push(b);
22 var r = o.take(b.length);
23 assert(r === b);
24 assert(o.isEmpty());
25 });
26
27 it('should return the slice of the buffer ', function() {
28 var b = new Buffer('hello world');
29 o.push(b);
30 assert.equal(o.take(5).toString(), 'hello');
31 assert.equal(o.take(1).toString(), ' ');
32 assert.equal(o.take(5).toString(), 'world');
33 assert(o.isEmpty());
34 });
35
36 it('should concat buffers', function() {
37 o.push(new Buffer('hello'));
38 o.push(new Buffer(' '));
39 o.push(new Buffer('world!'));
40 assert.equal(o.take(11).toString(), 'hello world');
41 assert.equal(o.take(1).toString(), '!');
42 assert(o.isEmpty());
43 });
44 });
45
46 describe('.skip', function() {
47 it('should skip bytes', function() {
48 o.push(new Buffer('hello '));
49 o.push(new Buffer('world'));
50 o.push(new Buffer(' oh gosh'));
51
52 assert.equal(o.take(2).toString(), 'he');
53 o.skip(1);
54 assert.equal(o.take(2).toString(), 'lo');
55 o.skip(1);
56 assert.equal(o.take(2).toString(), 'wo');
57 o.skip(4);
58 assert.equal(o.take(7).toString(), 'oh gosh');
59
60 assert(o.isEmpty());
61 });
62 });
63
64 describe('.peekUInt8', function() {
65 it('should return and not move by one byte', function() {
66 o.push(new Buffer([ 0x1, 0x2 ]));
67 assert.equal(o.peekUInt8(), 1);
68 assert.equal(o.readUInt8(), 1);
69 assert.equal(o.peekUInt8(), 2);
70 assert.equal(o.readUInt8(), 2);
71 assert(o.isEmpty());
72 });
73 });
74
75 describe('.peekInt8', function() {
76 it('should return signed number', function() {
77 o.push(new Buffer([ 0x80 ]));
78 assert.equal(o.peekInt8(), -128);
79 assert.equal(o.readInt8(), -128);
80 assert(o.isEmpty());
81 });
82 });
83
84 describe('.readUInt8', function() {
85 it('should return and move by one byte', function() {
86 o.push(new Buffer([ 0x1, 0x2 ]));
87 o.push(new Buffer([ 0x3, 0x4 ]));
88 assert.equal(o.readUInt8(), 1);
89 assert.equal(o.readUInt8(), 2);
90 assert.equal(o.readUInt8(), 3);
91 assert.equal(o.readUInt8(), 4);
92 assert(o.isEmpty());
93 });
94 });
95
96 describe('.readInt8', function() {
97 it('should return signed number', function() {
98 o.push(new Buffer([ 0x8f, 0x7f ]));
99 assert.equal(o.readInt8(), -113);
100 assert.equal(o.readInt8(), 127);
101 assert(o.isEmpty());
102 });
103 });
104
105 describe('.readUInt16LE', function() {
106 it('should return and move by two bytes', function() {
107 o.push(new Buffer([ 0x1, 0x2, 0x3 ]));
108 o.push(new Buffer([ 0x4, 0x5, 0x6 ]));
109 assert.equal(o.readUInt16LE(), 0x0201);
110 assert.equal(o.readUInt16LE(), 0x0403);
111 assert.equal(o.readUInt16LE(), 0x0605);
112 assert(o.isEmpty());
113 });
114
115 it('should return and move by two bytes (regression #1)', function() {
116 o.push(new Buffer([ 0x1 ]));
117 o.push(new Buffer([ 0x2, 0x3, 0x4 ]));
118 assert.equal(o.readUInt16LE(), 0x0201);
119 assert.equal(o.readUInt16LE(), 0x0403);
120 assert(o.isEmpty());
121 });
122 });
123
124 describe('.readInt16LE', function() {
125 it('should return signed number', function() {
126 o.push(new Buffer([ 0x23, 0x81 ]));
127 assert.equal(o.readInt16LE(), -32477);
128 assert(o.isEmpty());
129 });
130 });
131
132 describe('.readUInt24LE', function() {
133 it('should return and move by three bytes', function() {
134 o.push(new Buffer([ 0x1, 0x2, 0x3, 0x4, 0x5 ]));
135 o.push(new Buffer([ 0x6, 0x7 ]));
136 o.push(new Buffer([ 0x8, 0x9 ]));
137 assert.equal(o.readUInt24LE(), 0x030201);
138 assert.equal(o.readUInt24LE(), 0x060504);
139 assert.equal(o.readUInt24LE(), 0x090807);
140 assert(o.isEmpty());
141 });
142
143 it('should return and move by three bytes (regression #1)', function() {
144 o.push(new Buffer([ 0x1, 0x2 ]));
145 o.push(new Buffer([ 0x3 ]));
146 assert.equal(o.readUInt24LE(), 0x030201);
147 assert.equal(o.buffers.length, 0);
148 assert(o.isEmpty());
149 });
150 });
151
152 describe('.readInt24LE', function() {
153 it('should return signed number', function() {
154 o.push(new Buffer([ 0x23, 0x45, 0x81 ]));
155 assert.equal(o.readInt24LE(), -8305373);
156 assert(o.isEmpty());
157 });
158 });
159
160 describe('.readUInt32LE', function() {
161 it('should return and move by four bytes', function() {
162 o.push(new Buffer([ 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7 ]));
163 o.push(new Buffer([ 0x8, 0x9, 0xa ]));
164 o.push(new Buffer([ 0xb, 0xc, 0xd ]));
165 o.push(new Buffer([ 0xe, 0xf, 0x10 ]));
166 assert.equal(o.readUInt32LE(), 0x04030201);
167 assert.equal(o.readUInt32LE(), 0x08070605);
168 assert.equal(o.readUInt32LE(), 0x0c0b0a09);
169 assert.equal(o.readUInt32LE(), 0x100f0e0d);
170 assert(o.isEmpty());
171 });
172
173 it('should return and move by four bytes (regression #1)', function() {
174 o.push(new Buffer([ 0x1, 0x2, 0x3 ]));
175 o.push(new Buffer([ 0x4 ]));
176 assert.equal(o.readUInt32LE(), 0x04030201);
177 assert.equal(o.buffers.length, 0);
178 assert(o.isEmpty());
179 });
180 });
181
182 describe('.readInt32LE', function() {
183 it('should return signed number', function() {
184 o.push(new Buffer([ 0xff, 0xff, 0xff, 0xff ]));
185 assert.equal(o.readInt32LE(), -1);
186 assert(o.isEmpty());
187 });
188 });
189
190 describe('.readUInt16BE', function() {
191 it('should return and move by two bytes', function() {
192 o.push(new Buffer([ 0x1, 0x2, 0x3 ]));
193 o.push(new Buffer([ 0x4, 0x5, 0x6 ]));
194 assert.equal(o.readUInt16BE(), 0x0102);
195 assert.equal(o.readUInt16BE(), 0x0304);
196 assert.equal(o.readUInt16BE(), 0x0506);
197 assert(o.isEmpty());
198 });
199 });
200
201 describe('.readInt16BE', function() {
202 it('should return signed number', function() {
203 o.push(new Buffer([ 0x81, 0x23 ]));
204 assert.equal(o.readInt16BE(), -32477);
205 assert(o.isEmpty());
206 });
207 });
208
209 describe('.readUInt24BE', function() {
210 it('should return and move by three bytes', function() {
211 o.push(new Buffer([ 0x1, 0x2, 0x3, 0x4, 0x5 ]));
212 o.push(new Buffer([ 0x6, 0x7 ]));
213 o.push(new Buffer([ 0x8, 0x9 ]));
214 assert.equal(o.readUInt24BE(), 0x010203);
215 assert.equal(o.readUInt24BE(), 0x040506);
216 assert.equal(o.readUInt24BE(), 0x070809);
217 assert(o.isEmpty());
218 });
219 });
220
221 describe('.readInt24BE', function() {
222 it('should return signed number', function() {
223 o.push(new Buffer([ 0x81, 0x45, 0x23 ]));
224 assert.equal(o.readInt24BE(), -8305373);
225 assert(o.isEmpty());
226 });
227 });
228
229 describe('.readUInt32BE', function() {
230 it('should return and move by four bytes', function() {
231 o.push(new Buffer([ 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7 ]));
232 o.push(new Buffer([ 0x8, 0x9, 0xa ]));
233 o.push(new Buffer([ 0xb, 0xc, 0xd ]));
234 o.push(new Buffer([ 0xe, 0xf, 0x10 ]));
235 assert.equal(o.readUInt32BE(), 0x01020304);
236 assert.equal(o.readUInt32BE(), 0x05060708);
237 assert.equal(o.readUInt32BE(), 0x090a0b0c);
238 assert.equal(o.readUInt32BE(), 0x0d0e0f10);
239 assert(o.isEmpty());
240 });
241
242 it('should return positive values', function() {
243 o.push(new Buffer([ 0xff, 0xff, 0xff, 0xff ]));
244 assert.equal(o.readUInt32BE(), 0xffffffff);
245 assert(o.isEmpty());
246 });
247 });
248
249 describe('.readInt32BE', function() {
250 it('should return signed number', function() {
251 o.push(new Buffer([ 0xff, 0xff, 0xff, 0xff ]));
252 assert.equal(o.readInt32BE(), -1);
253 assert(o.isEmpty());
254 });
255 });
256
257 describe('.has', function() {
258 it('should properly check the amount of the remaining bytes', function() {
259 o.push(new Buffer([ 1, 2, 3 ]));
260 assert(o.has(3));
261 assert.equal(o.readUInt8(), 0x01);
262 assert(!o.has(3));
263 assert(o.has(2));
264 assert.equal(o.readUInt16BE(), 0x0203);
265 assert(!o.has(1));
266 });
267 });
268});
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