Nothing

```
test_that("shape_rep works correctly", {
# constant mx
mx1 <- c(0, 1, 1, 1, 1, 1, 1, 1, 1)
s1a <- shape_rep(mx1)
expect_identical(s1a, 0)
# constant hazard, custom xlim
s1b <- shape_rep(mx1, xmin = 2, xmax = 5)
expect_identical(s1b, 0)
# decreasing mx
mx2 <- seq(1, 0, -0.1)
s2 <- shape_rep(mx2)
expect_true(s2 > 0 & s2 < 0.5)
# increasing mx
mx3 <- seq(0, 1, 0.1)
s3 <- shape_rep(mx3)
expect_true(s3 < 0 & s3 > -0.5)
# check works with data frame
lt <- data.frame(x = seq_along(mx3) - 1, mx = mx3)
s4 <- shape_rep(lt)
expect_identical(s4, s3)
})
test_that("shape_rep warns and fails gracefully", {
# negative reproduction
# You appear to have minus-babies (check mx)
expect_error(shape_rep(c(0, 1, 1, 1, -0.1, 0)))
# < 3 nozero values of mx
# must have > 2 nonzero values of mx to calculate shape
expect_error(shape_rep(c(0, 0.5, 0.5)))
# "'rep' doesn't contain both x and mx"
rep1 <- list(mx = c(0, 0, 0.3, 0.4, 0.5, 0.6))
expect_error(shape_rep(rep1))
rep1 <- list(years = 0:5, mx = c(0, 0, 0.3, 0.4, 0.5, 0.6))
expect_error(shape_rep(rep1))
# x and mx must be the same length
rep1 <- list(x = 0:4, mx = c(0, 0, 0.3, 0.4, 0.5, 0.6))
expect_error(shape_rep(rep1))
# much as we'd like to reverse ageing, x must all be ascending
rep1 <- list(x = c(0, 1, 2, 3, 4, 3), mx = c(0, 0, 0.3, 0.4, 0.5, 0.6))
expect_error(shape_rep(rep1))
})
```

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