Nothing
# test_that("cummean is consistent with cumsum() and seq_along()", {
# x <- 1:5
# expect_equal(cummean.(x), c(1, 1.5, 2, 2.5, 3))
# expect_equal(cummean.(x), cumsum(x)/seq_along(x))
#
# expect_equal(cummean.(numeric()), numeric())
# })
#
# test_that("cumany and cumall handle NAs consistently (#408, #3749, #4132)", {
# batman <- c(NA, NA, NA, NA, NA)
# expect_true(all(is.na(cumany.(batman))))
# expect_true(all(is.na(cumall.(batman))))
#
# # normal usecases
# expect_identical(
# cumall.(c(TRUE, NA, FALSE, NA)),
# c(TRUE, NA, FALSE, FALSE)
# )
#
# expect_identical(
# cumall.(c(FALSE, NA, TRUE)),
# c(FALSE, FALSE, FALSE)
# )
#
# expect_identical(
# cumall.(c(NA, TRUE)),
# c(NA, NA)
# )
#
# expect_identical(
# cumall.(c(NA, FALSE)),
# c(NA, FALSE)
# )
#
# expect_identical(
# cumany.(c(TRUE, NA, FALSE)),
# c(TRUE, TRUE, TRUE)
# )
#
# expect_identical(
# cumany.(c(FALSE, NA, TRUE)),
# c(FALSE, NA, TRUE)
# )
#
# # scalars
# expect_true(is.na(cumall.(NA)))
# expect_true(is.na(cumany.(NA)))
# expect_true(cumall.(TRUE))
# expect_false(cumall.(FALSE))
# expect_true(cumany.(TRUE))
# expect_false(cumany.(FALSE))
#
# # degenerate cases
# expect_identical(
# cumall.(logical()),
# logical()
# )
#
# expect_identical(
# cumany.(logical()),
# logical()
# )
#
# # behaviour of degenerate logical vectors mimics that of base R functions
# x <- as.raw(c(2L, 9L, 0L))
# class(x) <- "logical"
# expect_identical(cumall.(x), x == TRUE)
# expect_identical(cumany.(x), c(TRUE, TRUE, TRUE))
# })
#
# test_that("cummean is not confused by FP error", {
# a <- rep(99, 9)
# expect_true(all(cummean.(a) == a))
# })
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