@eik/sink-memory

A Sink implementation that runs completely in memory, designed for automated tests.

Usage

``sh
npm install @eik/sink-memory
`

`js
import { pipeline } from 'node:stream';
import express from 'express';
import Sink from '@eik/sink-memory';

const app = express();
const sink = new Sink();

app.get('/file.js', async (req, res, next) => {
try {
const file = await sink.read('/path/to/file/file.js');
pipeline(file.stream, res, (error) => {
if (error) return next(error);
});
} catch (error) {
next(error);
}
});

app.listen(8000);
`

API

The sink instance has the following API:

$3

Method for writing a file to in-memory storage.

This method takes the following arguments:

- filePath - String - Path to the file to be stored - Required.
- contentType - String - The content type of the file - Required.

Resolves with a writable stream.

`js
import { pipeline } from 'node:stream';

const fromStream = new SomeReadableStream();
const sink = new Sink({ ... });

try {
const file = await sink.write('/path/to/file/file.js', 'application/javascript');
pipeline(fromStream, file.stream, (error) => {
if (error) console.log(error);
});
} catch (error) {
console.log(error);
}
`

$3

Method for reading a file from storage.

This method takes the following arguments:

- filePath - String - Path to the file to be read - Required.

Resolves with a [ReadFile][read-file] object which holds metadata about
the file and a readable stream with the byte stream of the file on the
.stream property.

`js
import { pipeline } from 'node:stream';

const toStream = new SomeWritableStream();
const sink = new Sink({ ... });

try {
const file = await sink.read('/path/to/file/file.js');
pipeline(file.stream, toStream, (error) => {
if (error) console.log(error);
});
} catch (error) {
console.log(error);
}
`

$3

Method for deleting a file in storage.

This method takes the following arguments:

- filePath - String - Path to the file to be deleted - Required.

Resolves if file is deleted and rejects if file could not be deleted.

`js
const sink = new Sink({ ... });

try {
await sink.delete('/path/to/file/file.js');
} catch (error) {
console.log(error);
}
`

$3

Method for checking if a file exist in the storage.

This method takes the following arguments:

- filePath - String - Path to the file to be checked for existence - Required.

Resolves if file exists and rejects if file does not exist.

`js
const sink = new Sink({ ... });

try {
await sink.exist('/path/to/file/file.js');
} catch (error) {
console.log(error);
}
``

[eik]: https://github.com/eik-lib
[read-file]: https://github.com/eik-lib/common/blob/master/lib/classes/read-file.js