Check if an argument is NULL
checkNull(x)check_null(x)
assertNull(x, .var.name = vname(x), add = NULL)
assert_null(x, .var.name = vname(x), add = NULL)
testNull(x)
test_null(x)
[any] Object to check.
[character(1)]
Name of the checked object to print in assertions. Defaults to
the heuristic implemented in vname.
[AssertCollection]
Collection to store assertion messages. See AssertCollection.
Depending on the function prefix:
If the check is successful, the functions
assertNull/assert_null return
x invisibly, whereas
checkNull/check_null and
testNull/test_null return
TRUE.
If the check is not successful,
assertNull/assert_null
throws an error message,
testNull/test_null
returns FALSE,
and checkNull returns a string with the error message.
The function expect_null always returns an
expectation.
Other basetypes: checkArray,
checkAtomicVector,
checkAtomic, checkCharacter,
checkComplex, checkDataFrame,
checkDate, checkEnvironment,
checkFactor, checkFunction,
checkIntegerish,
checkInteger, checkList,
checkLogical, checkMatrix,
checkNumeric, checkVector