var assert = require('assert');
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var hpack = require('../');
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describe('hpack/encoder', function() {
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var encoder;
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beforeEach(function() {
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encoder = hpack.encoder.create();
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});
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function expect(arr, enc) {
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function isNumber(num) {
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return typeof num === 'number';
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}
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var out = Buffer.concat(encoder.render()).toString('hex');
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if (Array.isArray(arr) && !arr.every(isNumber)) {
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arr = arr.map(function(item) {
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return new Buffer(item, enc);
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});
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arr = Buffer.concat(arr);
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} else {
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arr = new Buffer(arr, enc);
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}
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var actual = arr.toString('hex');
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assert.equal(out, actual);
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}
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describe('bit', function() {
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it('should encode number bit-by-bit', function() {
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[ 1, 1, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 1, 1, 1 ].forEach(function(bit) {
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encoder.encodeBit(bit);
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});
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expect([
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0b11101010,
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0b10101111
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]);
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});
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it('should encode number using multiple bits', function() {
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for (var i = 0; i < 8; i++)
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encoder.encodeBits(0b1011010, 7);
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expect([
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0b10110101,
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0b01101010,
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0b11010101,
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0b10101011,
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0b01010110,
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0b10101101,
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0b01011010
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]);
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});
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});
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describe('integer', function() {
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it('should encode 10 in prefix-5 (C.1.1)', function() {
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encoder.skipBits(3);
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encoder.encodeInt(10);
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expect([ 0x0a ]);
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});
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it('should decode 1337 in prefix-5 (C.1.2)', function() {
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encoder.skipBits(3);
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encoder.encodeInt(1337);
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expect([
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0b00011111,
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0b10011010,
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0b00001010
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]);
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});
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it('should decode 42 at octect boundary (C.1.3)', function() {
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encoder.encodeInt(42);
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expect([ 0b00101010 ]);
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});
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it('should regression 6-bit test', function() {
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encoder.skipBits(2);
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encoder.encodeInt(63);
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expect([ 0b00111111, 0b00000000 ]);
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});
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});
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describe('string', function() {
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it('should encode literal from (C.2.1)', function() {
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encoder.encodeStr(new Buffer('custom-key'), false);
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expect([ [ 0x0a ], 'custom-key' ]);
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});
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it('should encode literal from (C.4.1)', function() {
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encoder.encodeStr(new Buffer('www.example.com'), true);
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expect('8c' +
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'f1e3 c2e5 f23a 6ba0 ab90 f4ff'.replace(/ /g, ''),
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'hex');
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});
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it('should decode literal from (C.4.2)', function() {
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encoder.encodeStr(new Buffer('no-cache'), true);
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expect(
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'86' +
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'a8eb 1064 9cbf'.replace(/ /g, ''),
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'hex');
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});
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it('should encode literal from (C.4.3) #1', function() {
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encoder.encodeStr(new Buffer('custom-key'), true);
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expect(
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'88' +
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'25a8 49e9 5ba9 7d7f'.replace(/ /g, ''),
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'hex');
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});
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it('should encode literal from (C.4.3) #2', function() {
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encoder.encodeStr(new Buffer('custom-value'), true);
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expect(
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'89' +
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'25a8 49e9 5bb8 e8b4 bf'.replace(/ /g, ''),
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'hex');
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});
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it('should encode literal from (C.6.1) #1', function() {
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encoder.encodeStr(new Buffer('Mon, 21 Oct 2013 20:13:21 GMT'), true);
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expect(
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('96' +
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'd07a be94 1054 d444 a820 0595 040b 8166' +
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'e082 a62d 1bff').replace(/ /g, ''),
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'hex');
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});
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it('should encode literal from (C.6.1) #2', function() {
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encoder.encodeStr(new Buffer('https://www.example.com'), true);
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expect(
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('91' +
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'9d29 ad17 1863 c78f 0b97 c8e9 ae82 ae43' +
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'd3').replace(/ /g, ''),
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'hex');
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});
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it('should encode many 5 bit chars', function() {
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encoder.encodeStr(new Buffer('eeeeeeee'), true);
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// e = 00101, 0x294A5294A5 = 00101 x 8
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expect('85294A5294A5', 'hex');
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});
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it('should encode many 5 bit chars with 3-bit EOS', function() {
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// e = 00101, EOS=111,
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// 0x294A5294A52F = 00101 x 9 + 111
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encoder.encodeStr(new Buffer('eeeeeeeee'), true);
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expect('86294A5294A52F', 'hex');
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});
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it('should decode many 5 bit chars with 2-bit EOS', function() {
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// e = 00101, EOS=11,
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// 0x294A5297 = 00101 x 6 + 11
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encoder.encodeStr(new Buffer('eeeeee'), true);
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expect('84294A5297', 'hex');
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});
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it('should decode many multi-octet chars', function() {
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encoder.encodeStr([ 1, 1, 1, 1, 1, 1, 1, 1 ], true);
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expect('97ffffb1ffff63fffec7fffd8ffffb1ffff63fffec7fffd8',
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'hex');
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});
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});
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});
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