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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var common = require('../common');
var assert = require('assert');
var StringDecoder = require('string_decoder').StringDecoder;
process.stdout.write('scanning ');
// UTF-8
test('utf-8', new Buffer('$', 'utf-8'), '$');
test('utf-8', new Buffer('¢', 'utf-8'), '¢');
test('utf-8', new Buffer('€', 'utf-8'), '€');
test('utf-8', new Buffer('𤭢', 'utf-8'), '𤭢');
// A mixed ascii and non-ascii string
// Test stolen from deps/v8/test/cctest/test-strings.cc
// U+02E4 -> CB A4
// U+0064 -> 64
// U+12E4 -> E1 8B A4
// U+0030 -> 30
// U+3045 -> E3 81 85
test(
'utf-8',
new Buffer([0xCB, 0xA4, 0x64, 0xE1, 0x8B, 0xA4, 0x30, 0xE3, 0x81, 0x85]),
'\u02e4\u0064\u12e4\u0030\u3045'
);
// CESU-8
test('utf-8', new Buffer('EDA0BDEDB18D', 'hex'), '\ud83d\udc4d'); // thumbs up
// UCS-2
test('ucs2', new Buffer('ababc', 'ucs2'), 'ababc');
// UTF-16LE
test('ucs2', new Buffer('3DD84DDC', 'hex'), '\ud83d\udc4d'); // thumbs up
console.log(' crayon!');
// test verifies that StringDecoder will correctly decode the given input
// buffer with the given encoding to the expected output. It will attempt all
// possible ways to write() the input buffer, see writeSequences(). The
// singleSequence allows for easy debugging of a specific sequence which is
// useful in case of test failures.
function test(encoding, input, expected, singleSequence) {
var sequences;
if (!singleSequence) {
sequences = writeSequences(input.length);
} else {
sequences = [singleSequence];
}
sequences.forEach(function(sequence) {
var decoder = new StringDecoder(encoding);
var output = '';
sequence.forEach(function(write) {
output += decoder.write(input.slice(write[0], write[1]));
});
process.stdout.write('.');
if (output !== expected) {
var message =
'Expected "'+unicodeEscape(expected)+'", '+
'but got "'+unicodeEscape(output)+'"\n'+
'Write sequence: '+JSON.stringify(sequence)+'\n'+
'Decoder charBuffer: 0x'+decoder.charBuffer.toString('hex')+'\n'+
'Full Decoder State: '+JSON.stringify(decoder, null, 2);
assert.fail(output, expected, message);
}
});
}
// unicodeEscape prints the str contents as unicode escape codes.
function unicodeEscape(str) {
var r = '';
for (var i = 0; i < str.length; i++) {
r += '\\u'+str.charCodeAt(i).toString(16);
}
return r;
}
// writeSequences returns an array of arrays that describes all possible ways a
// buffer of the given length could be split up and passed to sequential write
// calls.
//
// e.G. writeSequences(3) will return: [
// [ [ 0, 3 ] ],
// [ [ 0, 2 ], [ 2, 3 ] ],
// [ [ 0, 1 ], [ 1, 3 ] ],
// [ [ 0, 1 ], [ 1, 2 ], [ 2, 3 ] ]
// ]
function writeSequences(length, start, sequence) {
if (start === undefined) {
start = 0;
sequence = []
} else if (start === length) {
return [sequence];
}
var sequences = [];
for (var end = length; end > start; end--) {
var subSequence = sequence.concat([[start, end]]);
var subSequences = writeSequences(length, end, subSequence, sequences);
sequences = sequences.concat(subSequences);
}
return sequences;
}
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