test_that("Checking my function", {
expect_error(sign_vars(iris[,1:3], as.data.frame(iris[,4])))
expect_equal(length(sign_vars(iris[,1:3], as.vector(iris[,4]))), ncol(iris[,1:3]))
expect_length(sign_vars(iris[,1:3], as.vector(iris[,4])), 3)
})
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.