I was doing some file processing in the stream pipe and wanted to test some error conditions. The first thing that came to my mind was open not existing file. And I found out that I cannot handle this situation. It looks like node.fs doesn't emit an 'error' event. Does anybody know how to handle the case? I have read that there is the same situation with fs.unlink.

const fName = 'C:/temp/fff.txt';
const outStream = fs.createWriteStream(fName + '.enc');
console.log(`-- 1111 ${fName} `);
fs.createReadStream(fName)
.pipe(outStream)
.on('open', () => {
  console.log(`ON OPEN  ${fName}`);
})
.on('error', (err) => {
  console.log(`ON ERROR ${fName}; an error happened: ${err.message}`);
})
.on('close', () => {
  console.log(`ON CLOSE  ${fName}`);
})
.on('end', () => {
  console.log(`ON END  ${fName}`);
});
console.log(`-- 2222 ${fName} `);

If file exists the output:

-- 1111 C:/temp/fff.txt
-- 2222 C:/temp/fff.txt
...
ON OPEN  C:/temp/fff.txt
ON CLOSE  C:/temp/fff.txt

If file doesn't exist:

-- 1111 C:/temp/fff.txt
-- 2222 C:/temp/fff.txt
...
ON OPEN  C:/temp/fff.txt
2022-06-13T19:28:48.379Z; error; uncaughtException: ENOENT: no such file or directory, open 'C:\temp\ffff.txt'
Error: ENOENT: no such file or directory, open 'C:\temp\ffff.txt';

C:\Users\p>

Similar issue: here

People ask: Is there a chance the error event will be emitted before stream.on('error', ...) takes effect?

Thanks a lot