var common = require('../common'); var assert = require('assert'); // minimum string size to overflow into external string space var EXTERN_APEX = 0xFBEE9; // manually controlled string for checking binary output var ucs2_control = 'a\u0000'; var write_str = 'a'; // first do basic checks var b = new Buffer(write_str, 'ucs2'); var c = b.toString('binary'); assert.equal(b[0], 0x61); assert.equal(b[1], 0); assert.equal(ucs2_control, c); // now create big strings var size = 1 + (1 << 20); write_str = Array(size).join(write_str); ucs2_control = Array(size).join(ucs2_control); // check resultant buffer and output string var b = new Buffer(write_str, 'ucs2'); // check fist Buffer created from write string for (var i = 0; i < b.length; i += 2) { assert.equal(b[i], 0x61); assert.equal(b[i + 1], 0); } // create another string to create an external string var b_bin = b.toString('binary'); var b_ucs = b.toString('ucs2'); // check control against external binary string assert.equal(ucs2_control, b_bin); // create buffer copy from external var c_bin = new Buffer(b_bin, 'binary'); var c_ucs = new Buffer(b_ucs, 'ucs2'); // make sure they're the same length assert.equal(c_bin.length, c_ucs.length); // make sure Buffers from externals are the same for (var i = 0; i < c_bin.length; i++) { assert.equal(c_bin[i], c_ucs[i], c_bin[i] + ' == ' + c_ucs[i] + ' : index ' + i); } // check resultant strings assert.equal(c_bin.toString('ucs2'), c_ucs.toString('ucs2')); assert.equal(c_bin.toString('binary'), ucs2_control); assert.equal(c_ucs.toString('binary'), ucs2_control); // now let's test BASE64 and HEX ecoding/decoding var RADIOS = 2; var PRE_HALF_APEX = Math.ceil(EXTERN_APEX / 2) - RADIOS; var PRE_3OF4_APEX = Math.ceil((EXTERN_APEX / 4) * 3) - RADIOS; (function () { for (var j = 0; j < RADIOS * 2; j += 1) { var datum = b; var slice = datum.slice(0, PRE_HALF_APEX + j); var slice2 = datum.slice(0, PRE_HALF_APEX + j + 2); var pumped_string = slice.toString('hex'); var pumped_string2 = slice2.toString('hex'); var decoded = new Buffer(pumped_string, 'hex'); var metadata = "\nEXTERN_APEX=1031913 - pumped_string.length=" metadata += pumped_string.length + '\n'; // the string are the same? for (var k = 0; k < pumped_string.length; ++k) { assert.equal(pumped_string[k], pumped_string2[k], metadata + 'chars should be the same at ' + k); } // the recoded buffer is the same? for (var i = 0; i < decoded.length; ++i) { assert.equal(datum[i], decoded[i], metadata + 'bytes should be the same at ' + i); } } })(); (function () { for (var j = 0; j < RADIOS * 2; j += 1) { var datum = b; var slice = datum.slice(0, PRE_3OF4_APEX + j); var slice2 = datum.slice(0, PRE_3OF4_APEX + j + 2); var pumped_string = slice.toString('base64'); var pumped_string2 = slice2.toString('base64'); var decoded = new Buffer(pumped_string, 'base64'); var metadata = "\nEXTERN_APEX=1031913 - data=" + slice.length metadata += " pumped_string.length=" + pumped_string.length + '\n'; // the string are the same? for (var k = 0; k < pumped_string.length - 3; ++k) { assert.equal(pumped_string[k], pumped_string2[k], metadata + 'chars should be the same for two slices at ' + k + ' ' + pumped_string[k] + ' ' + pumped_string2[k]); } // the recoded buffer is the same? for (var i = 0; i < decoded.length; ++i) { assert.equal(datum[i], decoded[i], metadata + 'bytes should be the same at ' + i); } } })(); // https://github.com/iojs/io.js/issues/1024 (function() { var a = Array(1 << 20).join('x'); var b = Buffer(a, 'ucs2').toString('ucs2'); var c = Buffer(b, 'utf8').toString('utf8'); assert.equal(a.length, b.length); assert.equal(b.length, c.length); assert.equal(a, b); assert.equal(b, c); })();