BASIC=basic
BASIC_EXPAND=$BASIC
MACHINE=machine_env
MACHINE_EXPAND=$MACHINE
UNDEFINED_EXPAND=$UNDEFINED_ENV_KEY
ESCAPED_EXPAND=\$ESCAPED
DEFINED_EXPAND_WITH_DEFAULT=${MACHINE:-default}
DEFINED_EXPAND_WITH_DEFAULT_NESTED=${MACHINE:-${UNDEFINED_ENV_KEY:-default}}
UNDEFINED_EXPAND_WITH_DEFINED_NESTED=${UNDEFINED_ENV_KEY:-${MACHINE:-default}}
UNDEFINED_EXPAND_WITH_DEFAULT=${UNDEFINED_ENV_KEY:-default}
UNDEFINED_EXPAND_WITH_DEFAULT_NESTED=${UNDEFINED_ENV_KEY:-${UNDEFINED_ENV_KEY_2:-default}}
# FIXME: dotenv-expand will parse the following as `default`
# UNDEFINED_EXPAND_WITH_DEFAULT_NESTED_TWICE=${UNDEFINED_ENV_KEY:-${UNDEFINED_ENV_KEY_2${UNDEFINED_ENV_KEY_3:-default}}}
UNDEFINED_EXPAND_WITH_DEFAULT_WITH_SPECIAL_CHARACTERS=${UNDEFINED_ENV_KEY:-/default/path}
MONGOLAB_DATABASE=heroku_db
MONGOLAB_USER=username
MONGOLAB_PASSWORD=password
MONGOLAB_DOMAIN=abcd1234.mongolab.com
MONGOLAB_PORT=12345
MONGOLAB_URI=mongodb://${MONGOLAB_USER}:${MONGOLAB_PASSWORD}@${MONGOLAB_DOMAIN}:${MONGOLAB_PORT}/${MONGOLAB_DATABASE}

MONGOLAB_USER_RECURSIVELY=${MONGOLAB_USER}:${MONGOLAB_PASSWORD}
MONGOLAB_URI_RECURSIVELY=mongodb://${MONGOLAB_USER_RECURSIVELY}@${MONGOLAB_DOMAIN}:${MONGOLAB_PORT}/${MONGOLAB_DATABASE}

WITHOUT_CURLY_BRACES_URI=mongodb://$MONGOLAB_USER:$MONGOLAB_PASSWORD@$MONGOLAB_DOMAIN:$MONGOLAB_PORT/$MONGOLAB_DATABASE
WITHOUT_CURLY_BRACES_USER_RECURSIVELY=$MONGOLAB_USER:$MONGOLAB_PASSWORD
WITHOUT_CURLY_BRACES_URI_RECURSIVELY=mongodb://$MONGOLAB_USER_RECURSIVELY@$MONGOLAB_DOMAIN:$MONGOLAB_PORT/$MONGOLAB_DATABASE
# FIXME: dotenv-expand will parse the following as `/default/path`
# WITHOUT_CURLY_BRACES_UNDEFINED_EXPAND_WITH_DEFAULT_WITH_SPECIAL_CHARACTERS=$UNDEFINED_ENV_KEY:-/default/path