{
    "BASIC": "basic",
    "BASIC_EXPAND": "basic",
    "MACHINE": "machine_env",
    "MACHINE_EXPAND": "machine_env",
    "UNDEFINED_EXPAND": "",
    "ESCAPED_EXPAND": "$ESCAPED",
    "DEFINED_EXPAND_WITH_DEFAULT": "machine_env",
    "DEFINED_EXPAND_WITH_DEFAULT_NESTED": "machine_env",
    "UNDEFINED_EXPAND_WITH_DEFINED_NESTED": "machine_env",
    "UNDEFINED_EXPAND_WITH_DEFAULT": "default",
    "UNDEFINED_EXPAND_WITH_DEFAULT_NESTED": "default",
    "UNDEFINED_EXPAND_WITH_DEFAULT_WITH_SPECIAL_CHARACTERS": "/default/path",
    "MONGOLAB_DATABASE": "heroku_db",
    "MONGOLAB_USER": "username",
    "MONGOLAB_PASSWORD": "password",
    "MONGOLAB_DOMAIN": "abcd1234.mongolab.com",
    "MONGOLAB_PORT": "12345",
    "MONGOLAB_URI": "mongodb://username:password@abcd1234.mongolab.com:12345/heroku_db",
    "MONGOLAB_USER_RECURSIVELY": "username:password",
    "MONGOLAB_URI_RECURSIVELY": "mongodb://username:password@abcd1234.mongolab.com:12345/heroku_db",
    "WITHOUT_CURLY_BRACES_URI": "mongodb://username:password@abcd1234.mongolab.com:12345/heroku_db",
    "WITHOUT_CURLY_BRACES_USER_RECURSIVELY": "username:password",
    "WITHOUT_CURLY_BRACES_URI_RECURSIVELY": "mongodb://username:password@abcd1234.mongolab.com:12345/heroku_db"
}