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'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const filename = common.tmpDir + '/truncate-file.txt';
common.refreshTmpDir();
// Synchronous test.
{
fs.writeFileSync(filename, '0123456789');
assert.strictEqual(fs.readFileSync(filename).toString(), '0123456789');
fs.truncateSync(filename, 5);
assert.strictEqual(fs.readFileSync(filename).toString(), '01234');
}
// Asynchronous test.
{
fs.writeFileSync(filename, '0123456789');
assert.strictEqual(fs.readFileSync(filename).toString(), '0123456789');
fs.truncate(filename, 5, common.mustCall(function(err) {
assert.ifError(err);
assert.strictEqual(fs.readFileSync(filename).toString(), '01234');
}));
}