Nothing
test_that("make sure levelsPrepF is working correctly", {
skip_on_cran()
newData <- data.frame(a = c(1,2,3))
originalData <- data.frame(a = c('a', 'b', 'c'))
expect_error(levelsPrepF(newData, newData, originalData), regexp="You supplied numeric values for a character/factor variable!")
})
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