check_reactive: Check that argument is reactive.
In teal: Exploratory Web Apps for Analyzing Clinical Trials Data

check_reactive

R Documentation

Check that argument is reactive.

Description

Check that argument is reactive.

Usage

check_reactive(x, null.ok = FALSE)

test_reactive(x, null.ok = FALSE)

assert_reactive(
  x,
  null.ok = FALSE,
  .var.name = checkmate::vname(x),
  add = NULL
)

Arguments

`x`	[any] Object to check.
`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`.

Value

Depending on the function prefix: If the check is successful, the functions assertClass/assert_class return x invisibly, whereas checkClass/check_class and testClass/test_class return TRUE. If the check is not successful, assertClass/assert_class throws an error message, testClass/test_class returns FALSE, and checkClass/check_class return a string with the error message. The function expect_class always returns an expectation.