pytest-sftpserver is a plugin for pytest that provides a local SFTP-Server fixture.

The SFTP-Server provided by this fixture serves content not from files but directly from Python objects.

Assume you want to test a function that downloads a file from an SFTP-Server:

from contextlib import closing
import paramiko
def get_sftp_file(host, port, username, password, path):
    with closing(paramiko.Transport((host, port))) as transport:
        transport.connect(username=username, password=password)
        with closing(paramiko.SFTPClient.from_transport(transport)) as sftpclient:
            with sftpclient.open(path, "r") as sftp_file:
                return sftp_file.read()

This plugin allows to test such functions without having to spin up an external SFTP-Server by providing a pytest fixture called sftpserver. You use it simply by adding a parameter named sftpserver to your test function:

def test_sftp_fetch(sftpserver):
    with sftpserver.serve_content({'a_dir': {'somefile.txt': "File content"}}):
        assert get_sftp_file(sftpserver.host, sftpserver.port, "user",
                             "pw", "/a_dir/somefile.txt") == "File content"

As can be seen from this example sftpserver serves content directly from python objects instead of files.

pip install pytest-sftpserver

This package supports the following Python versions:

• 2.7, 3.5 - 3.7

• Add more documentation
• Add more usage examples
• Add TODOs :)

• Updated supported Python versions to 2.7, 3.5 - 3.7.

  Droped (official) support for 3.4.

• Check / format code with black, isort and flake8.

• Fix return type of .read(). (#15, thanks @WeatherGod)

• Support the offset parameter on write operations. (#11, #16, thanks @DrNecromant)

• Updated supported Python versions to 2.7, 3.4 - 3.6. Droped (official) support for 2.6 and 3.2, 3.3.
• Now always uses posixpath internally to avoid problems when running on Windows (#7, #8, thanks @dundeemt)
• Fixed broken readme badges (#14, thanks @movermeyer)

• Fixed a bug in stat size calculation (#4)
• Fixed mkdir() overwriting existing content (#5)

Thanks to @zerok for both bug reports and accompanying tests.

• Fixed broken chmod() behaviour for non-existing 'files' (Thanks @dundeemt)

• Fixed broken stat() behaviour for non-existing 'files'
• Slightly increased test coverage

• Fixed broken test on Python 2.6

• Added Python 3.2 support
• Cleaned up tox configuration

• Initial release

Licensed unter the MIT License. See file LICENSE.

The implementation and idea for this plugin is in part based upon:

• pytest-localserver
• sftpserver
• The Twisted Conch in 60 Seconds series (although I ended up not using twisted, this was very helpful understanding SFTP internals)