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checkScalar

Check if an argument is a single atomic value

Description

Check if an argument is a single atomic value

Usage

checkScalar(x, na.ok = FALSE, null.ok = FALSE)

check_scalar(x, na.ok = FALSE, null.ok = FALSE)

assertScalar(
  x,
  na.ok = FALSE,
  null.ok = FALSE,
  .var.name = vname(x),
  add = NULL
)

assert_scalar(
  x,
  na.ok = FALSE,
  null.ok = FALSE,
  .var.name = vname(x),
  add = NULL
)

testScalar(x, na.ok = FALSE, null.ok = FALSE)

test_scalar(x, na.ok = FALSE, null.ok = FALSE)

expect_scalar(x, na.ok = FALSE, null.ok = FALSE, info = NULL, label = vname(x))

Arguments

x

[any]
Object to check.
na.ok

[logical(1)]
Are missing values allowed? Default is FALSE.
null.ok

[logical(1)]
If set to TRUE, x may also be NULL. In this case only a type check of x is performed, all additional checks are disabled.
.var.name

[character(1)]
Name of the checked object to print in assertions. Defaults to the heuristic implemented in vname.
add

[AssertCollection]
Collection to store assertion messages. See AssertCollection.
info

[character(1)]
Extra information to be included in the message for the testthat reporter. See expect_that.
label

[character(1)]
Name of the checked object to print in messages. Defaults to the heuristic implemented in vname.

Details

This function does not distinguish between NA, NA_integer_, NA_real_, NA_complex_ NA_character_ and NaN.

Value

Depending on the function prefix: If the check is successful, the functions assertScalar/assert_scalar return x invisibly, whereas checkScalar/check_scalar and testScalar/test_scalar return TRUE. If the check is not successful, assertScalar/assert_scalar throws an error message, testScalar/test_scalar returns FALSE, and checkScalar returns a string with the error message. The function expect_scalar always returns an expectation.

See Also

Examples

testScalar(1)
testScalar(1:10)
checkmate

Fast and Versatile Argument Checks

v2.0.0
BSD_3_clause + file LICENSE
Authors
Michel Lang [cre, aut] (<https://orcid.org/0000-0001-9754-0393>), Bernd Bischl [ctb]
Initial release

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