tests/testthat/test-scales_col_whitebox.R

In dieghernan/tidyterra: 'tidyverse' Methods and 'ggplot2' Helpers for 'terra' Objects

test_that("Discrete scale", {
  d <- data.frame(x = 1:5, y = 1:5, z = 21:25, l = letters[1:5])

  p <- ggplot2::ggplot(d) +
    ggplot2::geom_point(aes(x, y, colour = l))

  init <- ggplot2::layer_data(p)$colour
  p2 <- p + scale_colour_whitebox_d()

  mod <- ggplot2::layer_data(p2)$colour
  expect_true(!any(init %in% mod))

  p3 <- p + scale_color_whitebox_d()
  mod3 <- ggplot2::layer_data(p3)$colour
  expect_identical(mod, mod3)


  # Alpha
  expect_snapshot(p + scale_colour_whitebox_d(alpha = -1),
    error = TRUE
  )

  p3 <- p + scale_colour_whitebox_d(alpha = 0.9)

  mod_alpha <- ggplot2::layer_data(p3)$colour

  expect_true(all(alpha(mod, alpha = 0.9) == mod_alpha))

  # Reverse also with alpha
  expect_snapshot(p + scale_colour_whitebox_d(direction = 0.5),
    error = TRUE
  )



  p4 <- p + scale_colour_whitebox_d(
    direction = -1,
    alpha = 0.7
  )

  mod_alpha_rev <- ggplot2::layer_data(p4)$colour


  expect_true(
    all(rev(alpha(mod, alpha = 0.7)) == mod_alpha_rev)
  )

  # Change pal
  # Create ggplot for each pal, extract colors and check
  # that the colors are different on each plot

  allpals <- unique(whitebox_coltab$pal)

  # Get pals
  allpals_end <- lapply(allpals, function(x) {
    palplot <- p + scale_colour_whitebox_d(
      palette = x
    )
    mod_pal <- ggplot2::layer_data(palplot)$colour
    mod_pal
  })
  names(allpals_end) <- allpals
  allpals_end <- dplyr::bind_rows(allpals_end)

  length_cols <- lapply(seq_len(nrow(allpals_end)), function(x) {
    length(unique(allpals_end[x, ]))
  })
  length_cols <- unlist(length_cols)

  expect_true(all(length(allpals) == length_cols))
})

test_that("Continous scale", {
  d <- data.frame(x = 1:5, y = 1:5, z = 21:25, l = letters[1:5])

  p <- ggplot2::ggplot(d) +
    ggplot2::geom_point(aes(x, y, colour = z))

  init <- ggplot2::layer_data(p)$colour
  p2 <- p + scale_colour_whitebox_c()

  mod <- ggplot2::layer_data(p2)$colour
  expect_true(!any(init %in% mod))

  p3 <- p + scale_color_whitebox_c()
  mod3 <- ggplot2::layer_data(p3)$colour
  expect_identical(mod, mod3)

  # Alpha
  expect_snapshot(p + scale_colour_whitebox_c(alpha = -1),
    error = TRUE
  )

  p3 <- p + scale_colour_whitebox_c(alpha = 0.9)

  mod_alpha <- ggplot2::layer_data(p3)$colour

  expect_true(all(alpha(mod, alpha = 0.9) == mod_alpha))

  # Reverse also with alpha
  expect_snapshot(p + scale_colour_whitebox_c(direction = 0.5),
    error = TRUE
  )



  p4 <- p + scale_colour_whitebox_c(
    direction = -1,
    alpha = 0.7
  )

  mod_alpha_rev <- ggplot2::layer_data(p4)$colour


  expect_true(
    all(rev(alpha(mod, alpha = 0.7)) == mod_alpha_rev)
  )

  # Change pal
  # Create ggplot for each pal, extract colors and check
  # that the colors are different on each plot

  allpals <- unique(whitebox_coltab$pal)

  # Get pals
  allpals_end <- lapply(allpals, function(x) {
    palplot <- p + scale_colour_whitebox_c(
      palette = x
    )
    mod_pal <- ggplot2::layer_data(palplot)$colour
    mod_pal
  })
  names(allpals_end) <- allpals
  allpals_end <- dplyr::bind_rows(allpals_end)

  length_cols <- lapply(seq_len(nrow(allpals_end)), function(x) {
    length(unique(allpals_end[x, ]))
  })
  length_cols <- unlist(length_cols)

  expect_true(all(length(allpals) == length_cols))
})

test_that("Breaking scale", {
  d <- data.frame(
    x = 1:10, y = 1:10,
    z = 31:40
  )

  # Three cuts
  br <- c(32, 37)

  p_init <- ggplot2::ggplot(d) +
    ggplot2::geom_point(aes(x, y, colour = z))

  p <- p_init +
    ggplot2::scale_colour_viridis_b(breaks = br)

  init <- ggplot2::layer_data(p)$colour
  expect_true(length(unique(init)) == 3)



  p2 <- p_init +
    scale_colour_whitebox_b(breaks = br)

  mod <- ggplot2::layer_data(p2)$colour

  p3 <- p_init +
    scale_color_whitebox_b(breaks = br)

  mod3 <- ggplot2::layer_data(p3)$colour

  expect_identical(mod, mod3)

  expect_true(!any(init %in% mod))

  expect_true(length(unique(mod)) == 3)

  # Alpha
  expect_snapshot(p_init + scale_colour_whitebox_b(alpha = -1),
    error = TRUE
  )

  p3 <- p_init + scale_colour_whitebox_b(
    alpha = 0.9,
    breaks = br
  )

  mod_alpha <- ggplot2::layer_data(p3)$colour

  expect_true(all(alpha(mod, alpha = 0.9) == mod_alpha))
  expect_true(length(unique(mod_alpha)) == 3)

  # Reverse also with alpha
  expect_snapshot(p + scale_colour_whitebox_b(direction = 0.5),
    error = TRUE
  )



  p4 <- p_init + scale_colour_whitebox_b(
    direction = -1,
    alpha = 0.7,
    breaks = br
  )

  mod_alpha_rev <- ggplot2::layer_data(p4)$colour
  expect_true(length(unique(mod_alpha_rev)) == 3)

  # Change pal
  # Create ggplot for each pal, extract colors and check
  # that the colors are different on each plot

  allpals <- unique(whitebox_coltab$pal)

  # Get pals
  allpals_end <- lapply(allpals, function(x) {
    palplot <- p_init + scale_colour_whitebox_b(
      palette = x
    )
    mod_pal <- ggplot2::layer_data(palplot)$colour
    mod_pal
  })
  names(allpals_end) <- allpals
  allpals_end <- dplyr::bind_rows(allpals_end)

  length_cols <- lapply(seq_len(nrow(allpals_end)), function(x) {
    length(unique(allpals_end[x, ]))
  })
  length_cols <- unlist(length_cols)

  expect_true(all(length(allpals) == length_cols))
})