if (requiet("MASS")) { data(quine) set.seed(123) m1 <- glm.nb(Days ~ Sex / (Age + Eth * Lrn), data = quine) test_that("get_df", { expect_equal( get_df(m1, type = "residual"), df.residual(m1), ignore_attr = TRUE ) expect_equal( get_df(m1, type = "normal"), Inf, ignore_attr = TRUE ) expect_equal( get_df(m1, type = "wald"), Inf, ignore_attr = TRUE ) }) }
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