[TDD with Twisted](https://twistedmatrix.com/documents/current/core/howto/trial.html)

Look at adding Disco support: https://github.com/mimoo/disco/issues/4

Look at: https://github.com/qwj/python-proxy

If you are building on machine w/ an older version of OpenSSL (error: `cryptography.exceptions.UnsupportedAlgorithm: X448 is not supported by this version of OpenSSL.`), you can manually build the package cryptography using a newer version of OpenSSL.  First d/l and build OpenSSL:
1. Fetch OpenSSL: `wget https://www.openssl.org/source/openssl-1.1.1g.tar.gz`
2. Verify OpenSSL.  Use GPG or the SHA256.
3. extract OpenSSL: `tar -xzf openssl-1.1.1g.tar.gz`
4. Configure OpenSSL: `cd openssl-1.1.1g && ./config`
5. Build OpenSSL: `cd openssl-1.1.1g && make -j 4`

Now, rebuild the cryptography package w/ the new library:
1. Uninstall broken package: `pip uninstall cryptography`
2. Setup build environment: `export CFLAGS=-I<path>/openssl-1.1.1g/include; export LDFLAGS=-L<path>/openssl-1.1.1g`
3. Build cryptography from source: `pip install --no-binary :all: cryptography`
4. Setup library path: `export LD_LIBRARY_PATH=<path>/openssl-1.1.1g`