test_that("Continous on contourmap, R2 mesh", {
  skip_on_cran()

  data <- integration.testdata1()
  res1 <- contourmap(data$mu, data$Q,
    n.levels = 2,
    seed = data$seed, alpha = 0.1, max.threads = 1,
    compute = list(
      F = TRUE,
      measures = c("P2", "P1", "P0")
    )
  )

  bnd <- fmesher::fm_segm(
    cbind(
      c(0, 1, 2, 2, 2, 1, 0, 0),
      c(0, 0, 0, 1, 2, 2, 2, 1)
    ),
    is.bnd = TRUE
  )
  loc <- cbind(
    c(0.5, 1.5, 1),
    c(0.5, 0.5, 1.5)
  )
  mesh <- fmesher::fm_rcdt_2d_inla(loc = loc, boundary = bnd)
  expect_equal(data$n, mesh$n)

  GQ_direct <- gaussquad(mesh, method = "direct")
  GQ_make_A <- gaussquad(mesh, method = "make.A")
  expect_equal(GQ_direct$A, GQ_make_A$A, tolerance = 1e-15)

  res2 <- continuous(res1, mesh, method = "linear")

  expect_error(
    continuous(res1, mesh, method = "linear", output = "inla"),
    "Output format 'fm' not supported for 'calc.credible = TRUE'."
  )
  res3 <- continuous(res1, mesh,
    method = "linear", output = "inla",
    calc.credible = FALSE
  )
  res4 <- continuous(res1, mesh,
    method = "log", output = "inla",
    calc.credible = FALSE
  )
  expect_s4_class(res2$M, "SpatialPolygons")
  expect_s3_class(res3$M, "fm_segm")
  expect_s3_class(res4$M, "fm_segm")

  testthat::skip_if_not_installed("fmesher", "0.1.2.9003")
  # 0.1.2 had a bug for empty segments.
  res5 <- continuous(res1, mesh,
    method = "step", output = "inla",
    calc.credible = FALSE
  )
  expect_s3_class(res5$M, "fm_segm")
})

test_that("Continous on contourmap, M mesh", {
  skip_on_cran()

  data <- integration.testdata1()
  res1 <- contourmap(data$mu, data$Q,
    n.levels = 2,
    seed = data$seed, alpha = 0.1, max.threads = 1
  )

  bnd <- fmesher::fm_segm(
    cbind(
      c(0, 1, 2, 2, 2, 1, 0, 0),
      c(0, 0, 0, 1, 2, 2, 2, 1)
    ),
    is.bnd = TRUE
  )
  loc <- cbind(
    c(0.5, 1.5, 1),
    c(0.5, 0.5, 1.5)
  )
  mesh <- fmesher::fm_rcdt_2d_inla(loc = loc, boundary = bnd)
  expect_equal(data$n, mesh$n)

  # Alter z-coordinates and mark as general manifold
  mesh$loc[, 3] <- seq_len(mesh$n)
  mesh$manifold <- "M"

  res2 <- continuous(res1, mesh,
    method = "linear",
    output = "inla",
    calc.credible = FALSE
  )

  expect_s3_class(res2$M, "fm_segm")

  res3 <- continuous(res1, mesh,
    method = "log",
    output = "inla",
    calc.credible = FALSE
  )

  expect_s3_class(res3$M, "fm_segm")

  testthat::skip_if_not_installed("fmesher", "0.1.2.9003")
  res4 <- continuous(res1, mesh,
    method = "step",
    output = "inla",
    calc.credible = FALSE
  )
  expect_s3_class(res4$M, "fm_segm")
})