R: Combine multiple checks into one assertion

assert {checkmate} | R Documentation

## Combine multiple checks into one assertion

### Description

You can call this function with an arbitrary number of of `check*` functions, i.e. functions provided by this package or your own functions which return `TRUE` on success and the error message as `character(1)` otherwise. The resulting assertion is successful, if `combine` is “or” (default) and at least one check evaluates to `TRUE` or `combine` is “and” and all checks evaluate to `TRUE`. Otherwise, `assert` throws an informative error message.

### Usage

    assert(..., combine = "or", .var.name = NULL)

### Arguments

`...` | [any] List of calls to check functions.
`combine` | [`character(1)`] “or” or “and” to combine the check functions with an OR or AND, respectively.
`.var.name` | [`character(1)`] Name of the checked object to print in error messages. Defaults to the heuristic implemented in `vname`.

### Value

Throws an error if all checks fail and invisibly returns `TRUE` otherwise.

### Examples

    x = 1:10
    assert(checkNull(x), checkInteger(x, any.missing = FALSE))
    ## Not run:
    x = 1
    assert(checkChoice(x, c("a", "b")), checkDataFrame(x))

    ## End(Not run)

[Package checkmate version 1.9.4 Index]