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