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checkmate (version 2.3.2)

checkFlag: Check if an argument is a flag

Description

A flag is defined as single logical value.

Usage

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

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

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

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

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

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

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

Value

Depending on the function prefix: If the check is successful, the functions

assertFlag/assert_flag return

x invisibly, whereas

checkFlag/check_flag and

testFlag/test_flag return

TRUE. If the check is not successful,

assertFlag/assert_flag

throws an error message,

testFlag/test_flag

returns FALSE, and checkFlag/check_flag

return a string with the error message. The function expect_flag always returns an

expectation.

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.

See Also

Other scalars: checkCount(), checkInt(), checkNumber(), checkScalar(), checkScalarNA(), checkString()

Examples

Run this code
testFlag(TRUE)
testFlag(1)

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