tests/testthat/_snaps/optparse.md

In optparse: Command Line Option Parser

make_option() works as expected

Code
  make_option("badflag")
Condition
  Error:
  ! We require a long flag option

Code
  make_option(c("-cd", "--foo"))
Condition
  Error:
  ! Short flag -cd must only be a '-' and a single non-dash character

Code
  make_option(c("- ", "--foo"))
Condition
  Error:
  ! Short flag -  must not contain whitespace

Code
  make_option(c("-=", "--foo"))
Condition
  Error:
  ! Short flag -= must not contain '='

Code
  make_option("--fo=o")
Condition
  Error:
  ! Long flag --fo=o must not contain '='

Code
  make_option("--fo o")
Condition
  Error:
  ! Long flag --fo o must not contain whitespace

Code
  make_option("--foo", action = "storr")
Condition
  Error:
  ! "storr" is not a valid action; must be one of: "append", "append_const", "callback", "count", "store", "store_const", "store_false", "store_true"

Code
  make_option("--foo", type = "int")
Condition
  Error:
  ! "int" is not a valid type; must be one of: "character", "complex", "double", "integer", "logical", "NULL"

required argument works as expected

Code
  parse_args(parser, args = character(0))
Condition
  Error:
  ! the following arguments are required: --foo

Code
  parse_args(parser2, args = character(0))
Condition
  Error:
  ! the following arguments are required: --foo, --bar

parse_args() works as expected

Code
  parse_args(parser, args = c("-add-numbers", "example.txt"),
  positional_arguments = FALSE)
Condition
  Error:
  ! short flag "a" is invalid

Code
  parse_args(parser, args = c("-add-numbers", "example.txt"),
  positional_arguments = c(0, 1))
Condition
  Error:
  ! short flag "a" is invalid

Code
  parse_args(parser, args = c("example.txt"), positional_arguments = c(2, Inf))
Condition
  Error:
  ! required at least 2 positional arguments, got 1

Code
  parse_args(parser, args = c("example.txt"), positional_arguments = 2)
Condition
  Error:
  ! required at least 2 positional arguments, got 1

Code
  parse_args(parser, args = c("example.txt"), positional_arguments = "any")
Condition
  Error:
  ! positional_arguments must be logical or numeric

Code
  parse_args(parser, args = c("example.txt"), positional_arguments = 1:3)
Condition
  Error:
  ! positional_arguments must have length 1 or 2

positional argument with positional_arguments = FALSE raises an error

Code
  parse_args(parser, c("file.txt"))
Condition
  Error:
  ! "file.txt" is not a valid option

Code
  parse_args(parser, c("--verbose", "file.txt"))
Condition
  Error:
  ! "file.txt" is not a valid option

Use h option for non-help

Code
  OptionParser(usage = "\\%prog [options] file", option_list = option_list_neg)
Condition
  Error in `validityMethod()`:
  ! duplicate short flag: -h (did you forget to set `add_help_option = FALSE` in `OptionParser()`?)

no-argument actions reject --flag=value syntax

Code
  parse_args(parser, "--verbose=1")
Condition
  Error:
  ! long flag "verbose" accepts no arguments

Code
  parse_args(parser, "--quiet=1")
Condition
  Error:
  ! long flag "quiet" accepts no arguments

Code
  parse_args(parser, "--mode=1")
Condition
  Error:
  ! long flag "mode" accepts no arguments

Code
  parse_args(parser, "--tag=1")
Condition
  Error:
  ! long flag "tag" accepts no arguments

Code
  parse_args(parser, "--count=1")
Condition
  Error:
  ! long flag "count" accepts no arguments

optparse documentation built on April 17, 2026, 9:06 a.m.