Assert all files are directories — assert_all_directories_exist • assertions

Assert that all paths supplied exist and are directories. To assert a single directory exists, see assert_directory_exists()

Usage

assert_all_directories_exist(
  x,
  msg = NULL,
  call = rlang::caller_env(),
  arg_name = NULL
)

Arguments

x: Paths to directories (character)
msg: A character string containing the error message if file x is does not exist
call: Only relevant when pooling assertions into multi-assertion helper functions. See cli_abort for details.
arg_name: Advanced use only. Name of the argument passed (default: NULL, will automatically extract arg_name).

Value

invisible(TRUE) if x is exists and is a directory, otherwise aborts with the error message specified by msg

Examples

try({
assert_directory(system.file("package = assertions")) # PASSES
assert_directory("foo") # Throws Error
})
#> Error in assert_directory(system.file("package = assertions")) : 
#>   could not find function "assert_directory"