context("Test pmx_dens function")

#------------------- pmx_dens start ------------------------------------------
test_that("pmx_dens: params: x equals ETA_COV; result: identical structure", {
  x <- "ETA_COV"
  expect_identical(
    pmx_dens(x),
    structure(
      list(
        ptype = "PMX_DENS",
        strat = TRUE,
        x = "ETA_COV",
        dname = "predictions",
        xlim = 3,
        var_line = list(
          linetype = 1,
          colour = "black",
          linewidth = 1
        ),
        snd_line = list(
          linetype = 2,
          colour = "black",
          linewidth = 1
        ),
        vline = list(
          linetype = 2,
          colour = "black",
          linewidth = 1
        ),
        is.legend = TRUE,
        gp = pmx_gpar(
          labels = list(
            title = sprintf("Density plot of %s", x),
            y = "",
            x = "",
            subtitle = ""
          ),
          discrete = TRUE,
          is.smooth = FALSE
        )
      ),
      class = c("pmx_dens", "pmx_gpar")
    )
  )
})

test_that("pmx_dens: params: x equals ETA_COV; result: pmx_dens", {
  x <- "ETA_COV"
  expect_true(inherits(pmx_dens(x = x), "pmx_dens"))
})

test_that("pmx_dens: params: x equals NULL; result: pmx_dens", {
  x <- NULL
  expect_true(inherits(pmx_dens(x = x), "pmx_dens"))
})

test_that("pmx_dens: params: integer dname; result: error", {
  dname <- 10L
  expect_error(inherits(pmx_dens(dname = dname), "pmx_dens"))
})

test_that("pmx_dens: params: x equals ETA_COV, dname is NULL; result: pmx_dens", {
  x <- "ETA_COV"
  dname <- NULL
  expect_true(inherits(pmx_dens(x = x, dname = dname), "pmx_dens"))
})

test_that("pmx_dens: params: x is NULL, dname is NULL; result: pmx_dens", {
  x <- NULL
  dname <- NULL
  expect_true(inherits(pmx_dens(x = x, dname = dname), "pmx_dens"))
})

test_that("pmx_dens: params: labels is list, x isn't provided; result: error", {
  labels <- list(
    title = sprintf("Density plot"),
    y = "",
    x = "",
    subtitle = ""
  )
  expect_error(inherits(pmx_dens(labels = labels), "pmx_dens"))
})

test_that("pmx_dens: params: labels is list, x is provided; result: pmx_dens", {
  x <- "ETA"
  labels <- list(
    title = sprintf("Density plot"),
    y = "",
    x = "",
    subtitle = ""
  )
  expect_true(inherits(pmx_dens(x = x, labels = labels), "pmx_dens"))
})

test_that("pmx_dens: params: integer labels; result: error", {
  labels <- 10L
  expect_error(inherits(pmx_dens(labels = labels), "pmx_dens"))
})

test_that("pmx_dens: params: labels character; result: error", {
  labels <- "test label"
  expect_error(inherits(pmx_dens(labels = labels), "pmx_dens"))
})
#------------------- pmx_dens end --------------------------------------------

#------------------- pmx_plot_iwres_dens start -------------------------------
mlxpath <- file.path(
  system.file(package = "ggPMX"),
  "testdata",
  "1_popPK_model",
  "project.mlxtran"
)
ctr <- pmx_mlxtran(mlxpath, config = "standing")

test_that("pmx_dens: params: ctr; result: ggplot", {
  expect_true(inherits(pmx_plot_iwres_dens(ctr), "ggplot"))
})

test_that("pmx_dens: params: ctr is NULL; result: ggplot", {
  expect_error(pmx_plot_iwres_dens(ctr = NULL))
})

test_that("pmx_dens: params: ctr, is.legend is FALSE; result: ggplot", {
  expect_true(inherits(pmx_plot_iwres_dens(ctr, is.legend = FALSE), "ggplot"))
})

test_that("pmx_dens: params: ctr, var_line; result: ggplot", {
  expect_true(inherits(
    pmx_plot_iwres_dens(
      ctr,
      var_line = list(
        colour = "green",
        size = 1,
        linetype = 1
      )
    ),
    "ggplot"
  ))
})


test_that("pmx_dens: params: ctr; result: plot is not blank", {
  ctr <- theophylline()
  p <- pmx_plot_iwres_dens(ctr)
  p_obj <- ggplot2::ggplot_build(p)[["data"]][1:2]
  expect_false((length(p_obj[[1]]) == 0) || (length(p_obj[[2]]) == 0))
})


test_that("pmx_dens: params: ctr, var_line, snd_line; result: ggplot", {
  expect_true(inherits(
    pmx_plot_iwres_dens(
      ctr,
      var_line = list(
        colour = "green",
        size = 1,
        linetype = 1
      ),
      snd_line = list(colour = "red", size = 1)
    ),
    "ggplot"
  ))
})
#------------------- pmx_plot_iwres_dens end ---------------------------------