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var common = require('../common');
var assert = require('assert');
var fs = require('fs');
var filename = common.tmpDir + '/truncate-file.txt';
// Synchronous test.
(function() {
fs.writeFileSync(filename, '0123456789');
assert.equal(fs.readFileSync(filename).toString(), '0123456789');
fs.truncateSync(filename, 5);
assert.equal(fs.readFileSync(filename).toString(), '01234');
})();
// Asynchronous test.
(function() {
fs.writeFileSync(filename, '0123456789');
assert.equal(fs.readFileSync(filename).toString(), '0123456789');
fs.truncate(filename, 5, common.mustCall(function(err) {
if (err) throw err;
assert.equal(fs.readFileSync(filename).toString(), '01234');
}));
})();