Check if an argument is a single missing value

Description

Check if an argument is a single missing value

Usage

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checkScalarNA(x, null.ok = FALSE)

check_scalar_na(x, null.ok = FALSE)

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

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

testScalarNA(x, null.ok = FALSE)

test_scalar_na(x, null.ok = FALSE)

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

Arguments

x

[any]
Object to check.

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.

Value

Depending on the function prefix: If the check is successful, the functions assertScalarNA/assert_scalar_na return x invisibly, whereas checkScalarNA/check_scalar_na and testScalarNA/test_scalar_na return TRUE. If the check is not successful, assertScalarNA/assert_scalar_na throws an error message, testScalarNA/test_scalar_na returns FALSE, and checkScalarNA returns a string with the error message. The function expect_scalar_na always returns an expectation.

See Also

Other scalars: checkCount, checkFlag, checkInt, checkNumber, checkScalar, checkString

Examples

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testScalarNA(1)
testScalarNA(NA_real_)
testScalarNA(rep(NA, 2))

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