source: trip-planner-front/node_modules/hpack.js/test/decompressor-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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1var assert = require('assert');
2var hpack = require('../');
3var fixtures = require('./fixtures');
4
5describe('hpack/decompressor', function() {
6 var decomp;
7
8 beforeEach(function() {
9 decomp = hpack.decompressor.create({
10 table: {
11 maxSize: 1024
12 }
13 });
14 });
15
16 describe('indexed field', function() {
17 it('should fail on 0-index', function(cb) {
18 decomp.write(new Buffer([ 0b10000000 ]));
19 decomp.execute(function(err) {
20 assert(/zero index/i.test(err.message), err.message);
21 cb();
22 });
23 });
24
25 it('should fetch entry from static table', function() {
26 decomp.write(new Buffer([ 0b10000000 | 2 ]));
27 decomp.execute();
28 var field = decomp.read();
29 assert.equal(field.name, ':method');
30 assert.equal(field.value, 'GET');
31 });
32
33 it('should fetch entry from the end of the static table', function() {
34 decomp.write(new Buffer([ 0b10000000 | 61 ]));
35 decomp.execute();
36 var field = decomp.read();
37 assert.equal(field.name, 'www-authenticate');
38 assert.equal(field.value, '');
39 });
40
41 it('should fail on OOB-index', function(cb) {
42 decomp.write(new Buffer([ 0b11000000 ]));
43 decomp.execute(function(err) {
44 assert(/field oob/i.test(err.message), err.message);
45 cb();
46 });
47 });
48 });
49
50 describe('literal field', function() {
51 it('should lookup name in the table (incremental)', function() {
52 var value = new Buffer('localhost');
53 var header = new Buffer([
54 0b01000000 | 38, // 38th element from static table
55 value.length
56 ]);
57 decomp.write(Buffer.concat([ header, value ]));
58 decomp.execute();
59
60 var field = decomp.read();
61 assert.equal(field.name, 'host');
62 assert.equal(field.value, 'localhost');
63
64 decomp.write(new Buffer([ 0b10000000 | 62 ]));
65 decomp.execute();
66 var field = decomp.read();
67 assert.equal(field.name, 'host');
68 assert.equal(field.value, 'localhost');
69 });
70
71 it('should lookup name in the table (not-incremental)', function(cb) {
72 var value = new Buffer('localhost');
73 var header = new Buffer([
74 0b00001111,
75 0b00000000 | 23,
76 value.length
77 ]);
78 decomp.write(Buffer.concat([ header, value ]));
79 decomp.execute();
80
81 var field = decomp.read();
82 assert.equal(field.name, 'host');
83 assert.equal(field.value, 'localhost');
84
85 decomp.write(new Buffer([ 0b10000000 | 62 ]));
86 decomp.execute(function(err) {
87 assert(/field oob/i.test(err.message), err.message);
88 cb();
89 });
90 });
91
92 it('should evict header field from the table', function() {
93 var value = new Buffer('localhost');
94 var header = new Buffer([
95 0b01000000 | 38, // 38th element from static table
96 value.length
97 ]);
98 for (var i = 0; i < 1000; i++) {
99 decomp.write(Buffer.concat([ header, value ]));
100 decomp.execute();
101 var field = decomp.read();
102 assert.equal(field.name, 'host');
103 assert.equal(field.value, 'localhost');
104 }
105
106 assert(decomp._table.size < decomp._table.maxSize);
107 assert.equal(decomp._table.dynamic.length, 22);
108 });
109 });
110
111 describe('update size', function() {
112 it('should evict header field from the table', function() {
113 var value = new Buffer('localhost');
114 var header = new Buffer([
115 0b01000000 | 38, // 38th element from static table
116 value.length
117 ]);
118
119 decomp.write(Buffer.concat([ header, value ]));
120 decomp.execute();
121 var field = decomp.read();
122 assert.equal(field.name, 'host');
123 assert.equal(field.value, 'localhost');
124 assert.equal(decomp._table.dynamic.length, 1);
125
126 decomp.write(new Buffer([
127 0b00100000
128 ]));
129 decomp.execute();
130
131 assert.equal(decomp._table.dynamic.length, 0);
132 });
133 });
134
135 describe('spec examples', function() {
136 var decomp;
137 beforeEach(function() {
138 decomp = hpack.decompressor.create({
139 table: {
140 maxSize: 256
141 }
142 });
143 });
144
145 var tests = fixtures.specExamples;
146
147 tests.forEach(function(test, i) {
148 var prev = tests[i - 1];
149 it('should give expected output on ' + test.id, function() {
150 var startFrom = test.continuation ? prev.decomp : decomp;
151 if (!startFrom)
152 throw new Error('Previous test failed');
153 decomp = startFrom;
154
155 decomp.write(new Buffer(test.input.replace(/ /g, ''), 'hex'));
156 decomp.execute();
157
158 var output = [];
159 for (;;) {
160 var chunk = decomp.read();
161 if (!chunk)
162 break;
163
164 output.push([ chunk.name, chunk.value ]);
165 }
166
167 assert.deepEqual(output, test.output);
168
169 // Verify table contents
170 assert.deepEqual(decomp._table.dynamic.map(function(header) {
171 return [ header.name, header.value, header.totalSize ];
172 }).reverse(), test.table);
173
174 // Verify table size
175 var expectedSize = test.table.reduce(function(acc, item) {
176 return acc + item[2];
177 }, 0);
178 assert.equal(decomp._table.size, expectedSize);
179
180 test.decomp = decomp;
181 });
182 });
183 });
184});
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