checkmate (version 1.9.3)

checkNames: Check names to comply to specific rules

Description

Performs various checks on character vectors, usually names.

Usage

checkNames(x, type = "named", subset.of = NULL, must.include = NULL,
  permutation.of = NULL, identical.to = NULL, disjunct.from = NULL,
  what = "names")
check_names(x, type = "named", subset.of = NULL, must.include = NULL,
  permutation.of = NULL, identical.to = NULL, disjunct.from = NULL,
  what = "names")
assertNames(x, type = "named", subset.of = NULL, must.include = NULL,
  permutation.of = NULL, identical.to = NULL, disjunct.from = NULL,
  what = "names", .var.name = vname(x), add = NULL)
assert_names(x, type = "named", subset.of = NULL,
  must.include = NULL, permutation.of = NULL, identical.to = NULL,
  disjunct.from = NULL, what = "names", .var.name = vname(x),
  add = NULL)
testNames(x, type = "named", subset.of = NULL, must.include = NULL,
  permutation.of = NULL, identical.to = NULL, disjunct.from = NULL,
  what = "names")
test_names(x, type = "named", subset.of = NULL, must.include = NULL,
  permutation.of = NULL, identical.to = NULL, disjunct.from = NULL,
  what = "names")
expect_names(x, type = "named", subset.of = NULL,
  must.include = NULL, permutation.of = NULL, identical.to = NULL,
  disjunct.from = NULL, what = "names", info = NULL,
  label = vname(x))

Arguments

x

[character || NULL] Names to check using rules defined via type.

type

[character(1)] Type of formal check(s) to perform on the names.

unnamed:

Checks x to be NULL.

named:

Checks x for regular names which excludes names to be NA or empty ("").

unique:

Performs checks like with “named” and additionally tests for non-duplicated names.

strict:

Performs checks like with “unique” and additionally fails for names with UTF-8 characters and names which do not comply to R's variable name restrictions. As regular expression, this is “^[.]*[a-zA-Z]+[a-zA-Z0-9._]*$”.

ids:

Same as “strict”, but does not enforce uniqueness.

Note that for zero-length x, all these name checks evaluate to TRUE.

subset.of

[character] Names provided in x must be subset of the set subset.of.

must.include

[character] Names provided in x must be a superset of the set must.include.

permutation.of

[character] Names provided in x must be a permutation of the set permutation.of. Duplicated names in permutation.of are stripped out and duplicated names in x thus lead to a failed check. Use this argument instead of identical.to if the order of the names is not relevant.

identical.to

[character] Names provided in x must be identical to the vector identical.to. Use this argument instead of permutation.of if the order of the names is relevant.

disjunct.from

[character] Names provided in x must may not be present in the vector identical.to.

what

[character(1)] Type of name vector to check, e.g. “names” (default), “colnames” or “rownames”.

.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 assertNamed/assert_named return x invisibly, whereas checkNamed/check_named and testNamed/test_named return TRUE. If the check is not successful, assertNamed/assert_named throws an error message, testNamed/test_named returns FALSE, and checkNamed returns a string with the error message. The function expect_named always returns an expectation.

See Also

Other attributes: checkClass, checkMultiClass, checkNamed

Examples

# NOT RUN {
x = 1:3
testNames(x, "unnamed")
names(x) = letters[1:3]
testNames(x, "unique")

cn = c("Species", "Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width")
assertNames(names(iris), permutation.of = cn)
# }