context("print") test_that("print of small set works", { x <- data.frame(a=1, b=1) x_changed <- data.frame(a=1, b=100) diff <- diff_data(x, x_changed) output <- "Daff Comparison: ‘x’ vs. ‘x_changed’ a b -> 1 1->100 " expect_output(print(diff), output = output, update = FALSE) })