Check the class membership of an argument

checkMultiClass(x, classes, null.ok = FALSE)

check_multi_class(x, classes, null.ok = FALSE)

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

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

testMultiClass(x, classes, null.ok = FALSE)

test_multi_class(x, classes, null.ok = FALSE)

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

Arguments

x

[any]
Object to check.

classes

[character]
Class names to check for inheritance with inherits. x must inherit from any of the specified classes.

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 assertMultiClass/assert_multi_class return x invisibly, whereas checkMultiClass/check_multi_class and testMultiClass/test_multi_class return TRUE. If the check is not successful, assertMultiClass/assert_multi_class throws an error message, testMultiClass/test_multi_class returns FALSE, and checkMultiClass returns a string with the error message. The function expect_multi_class always returns an expectation.

See also

Other attributes: checkClass(), checkNamed(), checkNames()

Other classes: checkClass(), checkR6()

Examples

x = 1 class(x) = "bar" checkMultiClass(x, c("foo", "bar"))
#> [1] TRUE
checkMultiClass(x, c("foo", "foobar"))
#> [1] "Must inherit from class 'foo'/'foobar', but has class 'bar'"