simple-mock-ftp-server

A very basic mock FTP server for testing purposes.

Usage

This mock ftp relies on a mock FTP server (as for now, stripped down to the most simple version possible) bound to a mock filesystem.

Create a mock filesystem

It is possible to create a mock filesystem via a free form object using the createMockFilesystem function.

import { createMockFilesystem } from 'simple-mock-ftp-server';

const fs = createMockFilesystem({
   folder1: {
       fooFile: {
           ___contents: Buffer.from('bar'),
           ___mode: 755,
       },
       childFolder: {
           barFile: {
               ___contents: Buffer.from('baz'),
           },
       },
   },
   bazFile: {
       ___mode: 755,
       ___target: '/path/to/a/real/file',
   },
});

Files are the subobjects of the definition that got the '___contents' or '___target' attributes.
Please notice the 3 underscores preceding their names, they are there to prevent collision with the most possible directory names one can want to provide.
Any other subobject is considered a folder.

___contents

Must be a Buffer representing the binary contents of the mocked file in the mocked filesystem.

___target

Specifies a path on the real filesystem to get contents of an existing file as part of what's in the mocked filesystem.

___mode

Specifies the mode of the current file or folder. If not specified, defaults to 777 (all access).

Create a mock FTP server

import { createMockFtpServer, createMockFilesystem } from 'simple-mock-ftp-server';

const { server, abortController } = createMockFtpServer({
    host: '127.0.0.1',
    port: '12345',
    user: 'yourUserName',
    password: 'yourPassword',
    mockFilesystem: createMockFilesystem({
        folder1: {
            foo: {
                ___contents: Buffer.from('bar'),
            },
        },
        bar: {
            ___target: './path/to/a/file',
            ___mode: 755,
        },
    }),
});

If 'user' and 'password' are not specified, the ftp server will run in anonymous mode and no login will be necessary.

Warnings

This mock FTP server is not intended to be used in production. First of all, the mocked filesystem is in-memory only. So no data is persistent.
Also, SFTP (TLS) is not already implemented.
This mock ftp server is only meant to be used as an efficient way to mock a real FTP server in your test suites.

Disclaimer

Only a minimal subset of the defined FTP commands are implemented. It is intended to work with methods from basic-ftp library, such as downloadTo, uploadFrom... And for now it only works in non-secure mode. Such features are likely to be implemented in the future.
Contributions are welcome !