Nothing
context("Messages are returned by the ssurvglg() function.")
test_that("test if ssurvglg() returns warning messages.", {
expect_error(ssurvglg(data = example_sglg, npc = x3), "The formula argument is missing.")
expect_error(ssurvglg(Surv(log(obst2), delta2) ~ x1 + x2 - 1, npc = x3),
"The data argument is missing.")
})
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