| 'use strict'; |
| |
| const common = require('../common'); |
| |
| if (!common.enoughTestMem) |
| common.skip('intensive toString tests due to memory confinements'); |
| |
| const assert = require('assert'); |
| const fs = require('fs'); |
| const path = require('path'); |
| const cp = require('child_process'); |
| const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH; |
| if (common.isAIX && (Number(cp.execSync('ulimit -f')) * 512) < kStringMaxLength) |
| common.skip('intensive toString tests due to file size confinements'); |
| |
| const tmpdir = require('../common/tmpdir'); |
| tmpdir.refresh(); |
| |
| const file = path.join(tmpdir.path, 'toobig.txt'); |
| const stream = fs.createWriteStream(file, { |
| flags: 'a' |
| }); |
| |
| stream.on('error', (err) => { throw err; }); |
| |
| const size = kStringMaxLength / 200; |
| const a = Buffer.alloc(size, 'a'); |
| |
| for (let i = 0; i < 201; i++) { |
| stream.write(a); |
| } |
| |
| stream.end(); |
| stream.on('finish', common.mustCall(function() { |
| fs.readFile(file, 'utf8', common.mustCall(function(err, buf) { |
| assert.ok(err instanceof Error); |
| if (err.message !== 'Array buffer allocation failed') { |
| const stringLengthHex = kStringMaxLength.toString(16); |
| common.expectsError({ |
| message: 'Cannot create a string longer than ' + |
| `0x${stringLengthHex} characters`, |
| code: 'ERR_STRING_TOO_LONG', |
| type: Error |
| })(err); |
| } |
| assert.strictEqual(buf, undefined); |
| })); |
| })); |
| |
| function destroy() { |
| try { |
| fs.unlinkSync(file); |
| } catch { |
| // it may not exist |
| } |
| } |
| |
| process.on('exit', destroy); |
| |
| process.on('SIGINT', function() { |
| destroy(); |
| process.exit(); |
| }); |
| |
| // To make sure we don't leave a very large file |
| // on test machines in the event this test fails. |
| process.on('uncaughtException', function(err) { |
| destroy(); |
| throw err; |
| }); |