144 lines
4.7 KiB
JavaScript
144 lines
4.7 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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require('../common');
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const assert = require('assert');
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// Minimum string size to overflow into external string space
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const EXTERN_APEX = 0xFBEE9;
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// Manually controlled string for checking binary output
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let ucs2_control = 'a\u0000';
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let write_str = 'a';
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// First do basic checks
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let b = Buffer.from(write_str, 'ucs2');
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// first check latin1
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let c = b.toString('latin1');
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assert.strictEqual(b[0], 0x61);
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assert.strictEqual(b[1], 0);
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assert.strictEqual(ucs2_control, c);
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// now check binary
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c = b.toString('binary');
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assert.strictEqual(b[0], 0x61);
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assert.strictEqual(b[1], 0);
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assert.strictEqual(ucs2_control, c);
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// Now create big strings
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const size = 1 << 20;
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write_str = write_str.repeat(size);
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ucs2_control = ucs2_control.repeat(size);
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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.strictEqual(b[i], 0x61);
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assert.strictEqual(b[i + 1], 0);
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}
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// Create another string to create an external string
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const b_ucs = b.toString('ucs2');
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// Check control against external binary string
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const l_bin = b.toString('latin1');
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assert.strictEqual(ucs2_control, l_bin);
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// Check control against external binary string
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const b_bin = b.toString('binary');
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assert.strictEqual(ucs2_control, b_bin);
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// Create buffer copy from external
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const c_bin = Buffer.from(l_bin, 'latin1');
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const c_ucs = Buffer.from(b_ucs, 'ucs2');
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// Make sure they're the same length
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assert.strictEqual(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.strictEqual(c_bin[i], c_ucs[i]);
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}
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// Check resultant strings
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assert.strictEqual(c_bin.toString('ucs2'), c_ucs.toString('ucs2'));
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assert.strictEqual(c_bin.toString('latin1'), ucs2_control);
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assert.strictEqual(c_ucs.toString('latin1'), ucs2_control);
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// Now let's test BASE64 and HEX encoding/decoding
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const RADIOS = 2;
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const PRE_HALF_APEX = Math.ceil(EXTERN_APEX / 2) - RADIOS;
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const PRE_3OF4_APEX = Math.ceil((EXTERN_APEX / 4) * 3) - RADIOS;
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{
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for (let j = 0; j < RADIOS * 2; j += 1) {
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const datum = b;
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const slice = datum.slice(0, PRE_HALF_APEX + j);
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const slice2 = datum.slice(0, PRE_HALF_APEX + j + 2);
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const pumped_string = slice.toString('hex');
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const pumped_string2 = slice2.toString('hex');
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const decoded = Buffer.from(pumped_string, 'hex');
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// The string are the same?
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for (let k = 0; k < pumped_string.length; ++k) {
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assert.strictEqual(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 (let i = 0; i < decoded.length; ++i) {
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assert.strictEqual(datum[i], decoded[i]);
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}
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}
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}
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{
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for (let j = 0; j < RADIOS * 2; j += 1) {
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const datum = b;
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const slice = datum.slice(0, PRE_3OF4_APEX + j);
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const slice2 = datum.slice(0, PRE_3OF4_APEX + j + 2);
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const pumped_string = slice.toString('base64');
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const pumped_string2 = slice2.toString('base64');
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const decoded = Buffer.from(pumped_string, 'base64');
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// The string are the same?
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for (let k = 0; k < pumped_string.length - 3; ++k) {
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assert.strictEqual(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 (let i = 0; i < decoded.length; ++i) {
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assert.strictEqual(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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{
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const a = 'x'.repeat(1 << 20 - 1);
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const b = Buffer.from(a, 'ucs2').toString('ucs2');
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const c = Buffer.from(b, 'utf8').toString('utf8');
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assert.strictEqual(a.length, b.length);
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assert.strictEqual(b.length, c.length);
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assert.strictEqual(a, b);
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assert.strictEqual(b, c);
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}
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