test_that("tests the internal df repetition routines", {

  .rx <- loadNamespace("rxode2random")

  expect_equal(
    .rx$.vecDf(c(a = 1, b = 1, c = 3), 3),
    structure(list(
      a = c(1, 1, 1),
      b = c(1, 1, 1),
      c = c(3, 3, 3)
    ),
    row.names = c(NA, -3L),
    class = "data.frame"
    )
  )
  expect_error(.rx$.vecDf(c(a = 1, b = 1, c = 3), 0))

  d <- 4

  rxWithSeed(
    42,
    matL <- lapply(1:4, function(...) {
      tmp <- matrix(rnorm(d^2), d, d)
      tcrossprod(tmp, tmp)
    })
  )

  theta <- data.frame(
    a = as.double(1:4), b = as.double(5:8),
    c = as.double(9:12)
  )

  omega <- rxRmvn(4, setNames(1:d, paste0("a", 1:d)), matL)

  expand <- .rx$.cbindOme(theta, omega, 4)

  expect_equal(expand$a, rep(theta$a, each = 4))
  expect_equal(expand$b, rep(theta$b, each = 4))
  expect_equal(expand$c, rep(theta$c, each = 4))

  expect_equal(expand$a1, omega[, "a1"])
  expect_equal(expand$a2, omega[, "a2"])
  expect_equal(expand$a3, omega[, "a3"])
  expect_equal(expand$a4, omega[, "a4"])

  expand2 <- .rx$.cbindOme(theta, NULL, 4)

  expect_equal(expand2$a, expand$a)
  expect_equal(expand2$b, expand$b)
  expect_equal(expand2$c, expand$c)

  expand3 <- .rx$.cbindOme(NULL, omega, 4)

  expect_equal(expand3$a1, expand$a1)
  expect_equal(expand3$b1, expand$b1)
  expect_equal(expand3$c1, expand$c1)
})