Question: how to mock with jest

[vahidvdn]

Although this is for tracing bugs, since my question is specific to csv-parser I thought maybe it's the right place to ask. (hope you don't mind)

I have the following code to parse csv files:

const records = [];
const parser = fs
  .createReadStream(`${process.cwd()}/${file.destination}/${file.filename}`)
  .pipe(parse({}));

for await (const record of parser) {
  records.push(record);
}

I wanted to know how to mock this code in unit tests with jest. Any idea would be appreciated.