Create an expectation

@expect creates an expectation for your example code.

Details

Use @expect to create a testthat expectation.

#' @doctest
#'
#' @expect equals(4)
#' 2 + 2
#'
#' f <- function () warning("Watch out")
#' @expect warning()
#' f()

The next expression will be inserted as the first argument to the expect_* call.

Don't include the expect_ prefix.

If you want to include the expression in a different place or places, use a dot .:

@expect equals(., rev(.))
c("T", "E", "N", "E", "T")

The @expect tag and code must fit on a single line.