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'use strict';
const common = require('../common');
const fs = require('fs');
const assert = require('assert');
const join = require('path').join;
const filename = join(common.tmpDir, 'out.txt');
common.refreshTmpDir();
const fd = fs.openSync(filename, 'w');
const line = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n';
const N = 10240;
let complete = 0;
for (let i = 0; i < N; i++) {
// Create a new buffer for each write. Before the write is actually
// executed by the thread pool, the buffer will be collected.
const buffer = Buffer.from(line);
fs.write(fd, buffer, 0, buffer.length, null, function(er, written) {
complete++;
if (complete === N) {
fs.closeSync(fd);
const s = fs.createReadStream(filename);
s.on('data', testBuffer);
}
});
}
let bytesChecked = 0;
function testBuffer(b) {
for (let i = 0; i < b.length; i++) {
bytesChecked++;
if (b[i] !== 'a'.charCodeAt(0) && b[i] !== '\n'.charCodeAt(0)) {
throw new Error('invalid char ' + i + ',' + b[i]);
}
}
}
process.on('exit', function() {
// Probably some of the writes are going to overlap, so we can't assume
// that we get (N * line.length). Let's just make sure we've checked a
// few...
assert.ok(bytesChecked > 1000);
});
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