Configuration with insufficient arguments
config
ERR "Insufficient arguments for 'config' command"

Load with invalid file argument
config load ''
ERR "Invalid file '' for 'config load' command"

Load with nonexistent file argument
config load /nonexistent
ERR "Invalid file '/nonexistent' for 'config load' command"

Load with empty file argument
config load /dev/null
OK config load /dev/null

Load with extra arguments
config load /dev/null ''
ERR "Unexpected arguments for 'config load' command; got 4, expected 3"

Load with missing argument
config load
ERR "Unexpected arguments for 'config load' command; got 2, expected 3"

Reload configuration
config reload
OK config reload

Reload configuration with extra arguments
config reload ''
ERR "Unexpected arguments for 'config reload' command; got 3, expected 2"

Dump configuration with insufficient arguments
config dump
ERR "Unexpected arguments for 'config dump' command; got 2, expected 3"

Dump configuration with invalid file
config dump ''
ERR "Invalid file '' for 'config dump' command"

Dump configuration with extra arguments
config dump /dev/null ''
ERR "Unexpected arguments for 'config dump' command; got 4, expected 3"

Dump configuration to /dev/null
config dump /dev/null
OK config dump /dev/null

Save configuration
config save
OK config save

Save configuration with extra arguments
config save ''
ERR "Unexpected arguments for 'config save' command; got 3, expected 2"

Config command with empty subcommand
config ''
ERR "Unknown subcommand '' for 'config' command"

Config command with unknown subcommand
config foo
ERR "Unknown subcommand 'foo' for 'config' command"

Get configuration with fewer arguments
config get
ERR "Unexpected arguments for 'config get' command; got 2, expected 4"

Get configuration with extra arguments
config get foo bar baz
ERR "Unexpected arguments for 'config get' command; got 5, expected 4"

Set configuration with fewer arguments
config set
ERR "Unexpected arguments for 'config set' command; got 2, expected 5"

Set configuration with extra arguments
config set foo bar baz quux
ERR "Unexpected arguments for 'config set' command; got 6, expected 5"