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'use strict';
const common = require('../common');
const fs = require('fs');
const path = require('path');
const assert = require('assert');
const tmpdir = require('../common/tmpdir');
const file = path.join(tmpdir.path, 'write_stream_filehandle_test.txt');
const input = 'hello world';
tmpdir.refresh();
fs.promises.open(file, 'w+').then((handle) => {
let calls = 0;
const {
write: originalWriteFunction,
writev: originalWritevFunction
} = handle;
handle.write = function write() {
calls++;
return Reflect.apply(originalWriteFunction, this, arguments);
};
handle.writev = function writev() {
calls++;
return Reflect.apply(originalWritevFunction, this, arguments);
};
const stream = fs.createWriteStream(null, { fd: handle });
stream.end(input);
stream.on('close', common.mustCall(() => {
assert(calls > 0, 'expected at least one call to fileHandle.write or ' +
'fileHandle.writev, got 0');
}));
}).then(common.mustCall());
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