describe("options", {
  # use mtcars dataset
  data(mtcars, iris)

  # ***************
  # 'data' argument
  # ***************
  describe("data", {
    it("should accept a dataframe", {
      data <- data.frame()
      expect_equal(
        parallelPlot(data)$x$data,
        data
      )
    })

    it("should accept a matrix", {
      data <- matrix()
      expect_equal(
        parallelPlot(data)$x$data,
        data
      )
    })

    it("should refuse invalid value and throw an error", {
      expect_error(
        parallelPlot(data = list()),
        "'data' must be a dataframe"
      )
    })
  })

  # **********************
  # 'categorical' argument
  # **********************
  describe("categorical", {
    it("should keep unchanged a valid value", {
      categorical <- list(
        NULL,
        list(4, 6, 8),
        NULL, NULL, NULL, NULL, NULL,
        list(0, 1),
        list(0, 1),
        list(3:5),
        list(1:8)
      )
      expect_equal(
        parallelPlot(mtcars, categorical = categorical)$x$categorical,
        categorical
      )
    })
    it("should accept equivalent named list value", {
      categorical <- list(
        NULL,
        list(4, 6, 8),
        NULL, NULL, NULL, NULL, NULL,
        list(0, 1),
        list(0, 1),
        list(3:5),
        list(1:8)
      )
      categoricalAsNamedList <- list(
        cyl = list(4, 6, 8),
        vs = list(0, 1),
        am = list(0, 1),
        gear = list(3:5),
        carb = list(1:8)
      )
      expect_equal(
        parallelPlot(mtcars, categorical = categoricalAsNamedList)$x$categorical,
        categorical
      )
    })
    it("should fix invalid type and print a message", {
      categorical <- 1
      expect_message(
        out <- parallelPlot(mtcars, categorical = categorical),
        "'categorical' must be a list"
      )
      expect_equal(
        out$x$categorical,
        rep(list(NULL), ncol(mtcars))
      )
    })
    it("should fix invalid elements and print a message", {
      categorical <- list(
        NULL,
        data.frame(),
        NULL, NULL, NULL, NULL, NULL,
        list(0, 1),
        list(0, 1),
        list(3:5),
        list(1:8)
      )
      fixed <- categorical
      fixed[2] <- list(NULL)
      expect_message(
        out <- parallelPlot(mtcars, categorical = categorical),
        "categorical 2 must be a vector"
      )
      expect_equal(
        out$x$categorical,
        fixed
      )
    })
    it("should accept vector type for elements (by coercing to list)", {
      categorical <- list(NULL, c(4, 6, 8), NULL, NULL, NULL, NULL, NULL, c(0, 1), c(0, 1), 3:5, 1:8)
      fixed <- vapply(
        categorical,
        function(cat) ifelse(is.null(cat), list(NULL), list(as.list(cat))),
        list(1)
      )
      expect_equal(
        parallelPlot(mtcars, categorical = categorical)$x$categorical,
        fixed
      )
    })
    it("should fix invalid length and print a message", {
      categorical <- list()
      expect_message(
        out <- parallelPlot(mtcars, categorical = categorical),
        "Length of 'categorical' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$categorical,
        NULL
      )
    })
    it("should initialize using factor elements", {
      expect_equal(
        parallelPlot(iris)$x$categorical,
        list(NULL, NULL, NULL, NULL, list("setosa", "versicolor", "virginica"))
      )
    })
  })

  # ***********************
  # 'categoriesRep' argument
  # ***********************
  describe("categoriesRep", {
    categoriesRepList <- c("EquallySpacedLines", "EquallySizedBoxes")
    for (cr in categoriesRepList) {
      it(paste("should keep unchanged a valid value", cr), {
        expect_equal(
          parallelPlot(mtcars, categoriesRep = cr)$x$categoriesRep,
          cr
        )
      })
    }
    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(mtcars, categoriesRep = 1),
        paste("must be a valid categories representation type, it must be one of:", toString(categoriesRepList))
      )
      expect_equal(
        out$x$categoriesRep,
        categoriesRepList[1]
      )
    })
  })

  # ***********************
  # 'arrangeMethod' argument
  # ***********************
  describe("arrangeMethod", {
    arrangeMethodList <- c("fromLeft", "fromRight", "fromBoth", "fromNone")
    for (cr in arrangeMethodList) {
      it(paste("should keep unchanged a valid value", cr), {
        expect_equal(
          parallelPlot(mtcars, arrangeMethod = cr)$x$arrangeMethod,
          cr
        )
      })
    }
    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(mtcars, arrangeMethod = 1),
        paste("must be a valid arrange method, it must be one of:", toString(arrangeMethodList))
      )
      expect_equal(
        out$x$arrangeMethod,
        arrangeMethodList[1]
      )
    })
  })

  # **********************
  # 'keptColumns' argument
  # **********************
  describe("keptColumns", {
    it("should keep unchanged a valid value", {
      keptColumns <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      expect_equal(
        parallelPlot(mtcars, keptColumns = keptColumns)$x$keptColumns,
        keptColumns
      )
    })
    it("should accept equivalent list of column names", {
      keptColumns <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      keptColumnsAsColumnNames <- list("mpg", "disp", "drat", "qsec", "am", "gear", "carb")
      expect_equal(
        parallelPlot(mtcars, keptColumns = keptColumnsAsColumnNames)$x$keptColumns,
        keptColumns
      )
    })
    it("should fix invalid type and print a message", {
      keptColumns <- data.frame()
      expect_message(
        out <- parallelPlot(mtcars, keptColumns = keptColumns),
        "'keptColumns' must be a vector"
      )
      expect_equal(
        out$x$keptColumns,
        NULL
      )
    })
    it("should fix invalid elements and print a message", {
      keptColumns <- list(TRUE, "false", TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      fixed <- keptColumns
      fixed[2] <- TRUE
      expect_message(
        out <- parallelPlot(mtcars, keptColumns = keptColumns),
        "keptColumns 2 must be of logical type"
      )
      expect_equal(
        out$x$keptColumns,
        fixed
      )
    })
    it("should fix invalid length and print a message", {
      keptColumns <- list()
      expect_message(
        out <- parallelPlot(mtcars, keptColumns = keptColumns),
        "Length of 'keptColumns' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$keptColumns,
        NULL
      )
    })
  })

  # ***********************
  # 'inputColumns' argument
  # ***********************
  describe("inputColumns", {
    it("should keep unchanged a valid value", {
      inputColumns <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      expect_equal(
        parallelPlot(mtcars, inputColumns = inputColumns)$x$inputColumns,
        inputColumns
      )
    })
    it("should accept equivalent list of column names", {
      inputColumns <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      inputColumnsAsColumnNames <- list("mpg", "disp", "drat", "qsec", "am", "gear", "carb")
      expect_equal(
        parallelPlot(mtcars, inputColumns = inputColumnsAsColumnNames)$x$inputColumns,
        inputColumns
      )
    })
    it("should fix invalid type and print a message", {
      inputColumns <- data.frame()
      expect_message(
        out <- parallelPlot(mtcars, inputColumns = inputColumns),
        "'inputColumns' must be a vector"
      )
      expect_equal(
        out$x$inputColumns,
        NULL
      )
    })
    it("should fix invalid elements and print a message", {
      inputColumns <- list(TRUE, "false", TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      fixed <- inputColumns
      fixed[2] <- TRUE
      expect_message(
        out <- parallelPlot(mtcars, inputColumns = inputColumns),
        "inputColumns 2 must be of logical type"
      )
      expect_equal(
        out$x$inputColumns,
        fixed
      )
    })
    it("should fix invalid length and print a message", {
      inputColumns <- list()
      expect_message(
        out <- parallelPlot(mtcars, inputColumns = inputColumns),
        "Length of 'inputColumns' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$inputColumns,
        NULL
      )
    })
  })

  # **************************
  # 'histoVisibility' argument
  # **************************
  describe("histoVisibility", {
    it("should keep unchanged a valid value", {
      histoVisibility <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      expect_equal(
        parallelPlot(mtcars, histoVisibility = histoVisibility)$x$histoVisibility,
        histoVisibility
      )
    })
    it("should accept equivalent list of column names", {
      histoVisibility <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      histoVisibilityAsColumnNames <- list("mpg", "disp", "drat", "qsec", "am", "gear", "carb")
      expect_equal(
        parallelPlot(mtcars, histoVisibility = histoVisibilityAsColumnNames)$x$histoVisibility,
        histoVisibility
      )
    })
    it("should fix invalid type and print a message", {
      histoVisibility <- data.frame()
      expect_message(
        out <- parallelPlot(mtcars, histoVisibility = histoVisibility),
        "'histoVisibility' must be a vector"
      )
      expect_equal(
        out$x$histoVisibility,
        NULL
      )
    })
    it("should fix invalid elements and print a message", {
      histoVisibility <- list(FALSE, "true", FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE, TRUE)
      fixed <- histoVisibility
      fixed[[2]] <- FALSE

      expect_message(
        out <- parallelPlot(mtcars, histoVisibility = histoVisibility),
        "histoVisibility 2 must be of logical type"
      )
      expect_equal(
        out$x$histoVisibility,
        fixed
      )
    })
    it("should fix invalid length and print a message", {
      histoVisibility <- list()
      expect_message(
        out <- parallelPlot(mtcars, histoVisibility = histoVisibility),
        "Length of 'histoVisibility' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$histoVisibility,
        NULL
      )
    })
  })

  # ***********************
  # 'invertedAxes' argument
  # ***********************
  describe("invertedAxes", {
    it("should keep unchanged a valid value", {
      invertedAxes <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      expect_equal(
        parallelPlot(mtcars, invertedAxes = invertedAxes)$x$invertedAxes,
        invertedAxes
      )
    })
    it("should accept equivalent list of column names", {
      invertedAxes <- list(TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE)
      invertedAxesAsColumnNames <- list("mpg", "disp", "drat", "qsec", "am", "gear", "carb")
      expect_equal(
        parallelPlot(mtcars, invertedAxes = invertedAxesAsColumnNames)$x$invertedAxes,
        invertedAxes
      )
    })
    it("should fix invalid type and print a message", {
      invertedAxes <- data.frame()
      expect_message(
        out <- parallelPlot(mtcars, invertedAxes = invertedAxes),
        "'invertedAxes' must be a vector"
      )
      expect_equal(
        out$x$invertedAxes,
        NULL
      )
    })
    it("should fix invalid elements and print a message", {
      invertedAxes <- list(FALSE, "true", FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE, TRUE)
      fixed <- invertedAxes
      fixed[[2]] <- FALSE

      expect_message(
        out <- parallelPlot(mtcars, invertedAxes = invertedAxes),
        "invertedAxes 2 must be of logical type"
      )
      expect_equal(
        out$x$invertedAxes,
        fixed
      )
    })
    it("should fix invalid length and print a message", {
      invertedAxes <- list()
      expect_message(
        out <- parallelPlot(mtcars, invertedAxes = invertedAxes),
        "Length of 'invertedAxes' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$invertedAxes,
        NULL
      )
    })
  })

  # **************************
  # 'cutoffs' argument
  # **************************
  describe("cutoffs", {
    it("should keep unchanged a valid value", {
      cutoffs <- list(list(list(6, 7)), NULL, NULL, NULL, list("virginica", "setosa"))
      expect_equal(
        parallelPlot(iris, cutoffs = cutoffs)$x$cutoffs,
        cutoffs
      )
    })

    it("should accept equivalent named list value", {
      cutoffs <- list(list(list(6, 7)), NULL, NULL, NULL, list("virginica", "setosa"))
      cutoffsAsNamedList <- list(Sepal.Length = list(list(6, 7)), Species = list("virginica", "setosa"))
      expect_equal(
        parallelPlot(iris, cutoffs = cutoffsAsNamedList)$x$cutoffs,
        cutoffs
      )
    })

    it("should fix invalid type and print a message", {
      cutoffs <- 1
      expect_message(
        out <- parallelPlot(mtcars, cutoffs = cutoffs),
        "'cutoffs' must be a list"
      )
      expect_equal(
        out$x$cutoffs,
        NULL
      )
    })

    it("should fix invalid length and print a message", {
      cutoffs <- list()
      expect_message(
        out <- parallelPlot(mtcars, cutoffs = cutoffs),
        "Length of 'cutoffs' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$cutoffs,
        NULL
      )
    })

    it("should fix invalid continuous type and print a message", {
      cutoffs <- list(NULL, list(NULL, NULL), NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL)
      fixed <- cutoffs
      fixed[2] <- list(NULL)
      expect_message(
        out <- parallelPlot(mtcars, cutoffs = cutoffs),
        "cutoffs 2 contains an interval not defined by a vector"
      )
      expect_equal(
        out$x$cutoffs,
        fixed
      )
    })

    it("should fix no-numerical intervals and print a message", {
      cutoffs <- list(list(list("6", "7")), NULL, NULL, NULL, list("virginica", "setosa"))
      fixed <- cutoffs
      fixed[1] <- list(NULL)
      expect_message(
        out <- parallelPlot(iris, cutoffs = cutoffs),
        "cutoffs 1 contains a no-numeric interval"
      )
      expect_equal(
        out$x$cutoffs,
        fixed
      )
    })

    it("should fix intervals not defined by two values and print a message", {
      cutoffs <- list(list(list(6, 7, 8)), NULL, NULL, NULL, list("virginica", "setosa"))
      fixed <- cutoffs
      fixed[1] <- list(NULL)
      expect_message(
        out <- parallelPlot(iris, cutoffs = cutoffs),
        "cutoffs 1 contains an interval not defined by two values"
      )
      expect_equal(
        out$x$cutoffs,
        fixed
      )
    })

    it("should fix invalid categorical type and print a message", {
      cutoffs <- list(list(c(6, 7)), NULL, NULL, NULL, data.frame())
      fixed <- cutoffs
      fixed[5] <- list(NULL)
      expect_message(
        out <- parallelPlot(iris, cutoffs = cutoffs),
        "cutoffs 5 must be a list"
      )
      expect_equal(
        out$x$cutoffs,
        fixed
      )
    })

    it("should warn for unknown categories", {
      cutoffs <- list(list(list(6, 7)), NULL, NULL, NULL, list("virginica", "setosaaaa"))
      expect_message(
        out <- parallelPlot(iris, cutoffs = cutoffs),
        "cutoffs 5 references unknown categories"
      )
      expect_equal(
        out$x$cutoffs,
        cutoffs
      )
    })
  })

  # ***********************
  # 'refRowIndex' argument
  # ***********************
  describe("refRowIndex", {
    it("should keep unchanged a valid value", {
      refRowIndex <- 1
      expect_equal(
        parallelPlot(iris, refRowIndex = refRowIndex)$x$refRowIndex,
        refRowIndex
      )
    })
    it("should fix invalid type and print a message", {
      refRowIndex <- data.frame()
      expect_message(
        out <- parallelPlot(iris, refRowIndex = refRowIndex),
        "'refRowIndex' must be of integer type"
      )
      expect_equal(
        out$x$refRowIndex,
        NULL
      )
    })
    it("should fix invalid value and print a message", {
      refRowIndex <- 0
      expect_message(
        out <- parallelPlot(iris, refRowIndex = refRowIndex),
        "must be a valid row index, it must be in range"
      )
      expect_equal(
        out$x$refRowIndex,
        NULL
      )
    })
  })

  # ***********************
  # 'refColumnDim' argument
  # ***********************
  describe("refColumnDim", {
    it("should keep unchanged a valid value", {
      refColumnDim <- "cyl"
      expect_equal(
        parallelPlot(mtcars, refColumnDim = refColumnDim)$x$refColumnDim,
        refColumnDim
      )
    })
    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(mtcars, refColumnDim = 1),
        paste("must be a valid column dimension, it must be one of:", toString(colnames(mtcars)))
      )
      expect_equal(
        out$x$refColumnDim,
        NULL
      )
    })
  })

  # **********************
  # 'rotateTitle' argument
  # **********************
  describe("rotateTitle", {
    it("should keep unchanged a valid value TRUE", {
      expect_equal(
        parallelPlot(data.frame(), rotateTitle = TRUE)$x$rotateTitle,
        TRUE
      )
    })

    it("should keep unchanged a valid value FALSE", {
      expect_equal(
        parallelPlot(data.frame(), rotateTitle = FALSE)$x$rotateTitle,
        FALSE
      )
    })

    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(data.frame(), rotateTitle = 1),
        "'rotateTitle' must be of logical type"
      )
      expect_equal(
        out$x$rotateTitle,
        FALSE
      )
    })
  })

  # ***********************
  # 'columnLabels' argument
  # ***********************
  describe("columnLabels", {
    it("should keep unchanged a valid value", {
      columnLabels <- gsub("\\.", "<br>", colnames(iris))
      expect_equal(
        parallelPlot(iris, columnLabels = columnLabels)$x$columnLabels,
        columnLabels
      )
    })
    it("should fix invalid type and print a message", {
      columnLabels <- data.frame()
      expect_message(
        out <- parallelPlot(mtcars, columnLabels = columnLabels),
        "'columnLabels' must be a vector"
      )
      expect_equal(
        out$x$columnLabels,
        NULL
      )
    })
    it("should fix invalid elements and print a message", {
      columnLabels <- list(
        "Col 1", FALSE, "Col 3", "Col 4", "Col 5", "Col 6",
        "Col 7", "Col 8", "Col 9", "Col 10", "Col 11"
      )
      fixed <- columnLabels
      fixed[2] <- list(NULL)
      expect_message(
        out <- parallelPlot(mtcars, columnLabels = columnLabels),
        "columnLabels 2 must be of character type"
      )
      expect_equal(
        out$x$columnLabels,
        fixed
      )
    })
    it("should fix invalid length and print a message", {
      columnLabels <- list()
      expect_message(
        out <- parallelPlot(mtcars, columnLabels = columnLabels),
        "Length of 'columnLabels' must be equal to the number of columns of 'data'"
      )
      expect_equal(
        out$x$columnLabels,
        NULL
      )
    })
  })

  # ***********************
  # 'continuousCS' argument
  # ***********************
  describe("continuousCS", {
    continuousCSList <- c(
      "Viridis", "Inferno", "Magma", "Plasma", "Warm", "Cool", "Rainbow", "CubehelixDefault",
      "Blues", "Greens", "Greys", "Oranges", "Purples", "Reds", "BuGn", "BuPu", "GnBu", "OrRd",
      "PuBuGn", "PuBu", "PuRd", "RdBu", "RdPu", "YlGnBu", "YlGn", "YlOrBr", "YlOrRd"
    )
    for (cs in continuousCSList) {
      it(paste("should keep unchanged a valid value", cs), {
        expect_equal(
          parallelPlot(mtcars, continuousCS = cs)$x$continuousCS,
          cs
        )
      })
    }
    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(mtcars, continuousCS = 1),
        paste(
          "must be a valid continuous color scale name, it must be one of:",
          toString(continuousCSList)
        )
      )
      expect_equal(
        out$x$continuousCS,
        continuousCSList[1]
      )
    })
  })

  # ************************
  # 'categoricalCS' argument
  # ************************
  describe("categoricalCS", {
    categoricalCSList <- c("Category10", "Accent", "Dark2", "Paired", "Set1")
    for (cs in categoricalCSList) {
      it(paste("should keep unchanged a valid value", cs), {
        expect_equal(
          parallelPlot(mtcars, categoricalCS = cs)$x$categoricalCS,
          cs
        )
      })
    }
    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(mtcars, categoricalCS = 1),
        paste(
          "must be a valid categorical color scale name, it must be one of:",
          toString(categoricalCSList)
        )
      )
      expect_equal(
        out$x$categoricalCS,
        categoricalCSList[1]
      )
    })
  })

  # ************************
  # 'eventInputId' argument
  # ************************
  describe("eventInputId", {
    it("should keep unchanged a valid value", {
      eventInputId <- "testingInputId"
      expect_equal(
        parallelPlot(mtcars, eventInputId = eventInputId)$x$eventInputId,
        eventInputId
      )
    })
    it("should fix invalid value and print a message", {
      expect_message(
        out <- parallelPlot(mtcars, eventInputId = 1),
        "'eventInputId' must be of character type"
      )
      expect_equal(
        out$x$eventInputId,
        NULL
      )
    })
  })

})