Rename to choose_text_color and update tests

Changed name of set_text_color() to choose_text_color() to avoid confusion with the global option setter functions, e.g. set_text_size(). Updated tests to reflect modified threshold.

R/plot_helpers.R

 
   if (!".alpha" %in% names(d)) d <- d %>% mutate(.alpha = 1)
   if (!".textcolor" %in% names(d))
-    d <- d %>% mutate(.textcolor = set_text_color(.color))
+    d <- d %>% mutate(.textcolor = choose_text_color(.color))
 
   if (".id_long" %in% names(d)) {
     d <- d %>% mutate(.item_id = paste(.id_long, .col, sep = "-"))

R/process_data_helpers.R

       .textcolor = text_color)
 
   if (is.na(text_color))
-    res <- res %>% mutate(.textcolor = set_text_color(.color))
+    res <- res %>% mutate(.textcolor = choose_text_color(.color))
 
   return(res)
 }

R/utils.R

 `%||%` <- function(x, y) if (is.null(x)) y else x
 
-set_text_color <- function(x, black = "#000000", white = "#FFFFFF") {
+choose_text_color <- function(x, black = "#000000", white = "#FFFFFF") {
   # x = color_hex
   color_rgb <- col2rgb(x)
   # modified from https://stackoverflow.com/a/3943023/2022615

tests/testthat/test-choose_text_color.R

+context("test-set_text_color")
+
+test_that("correct color selection", {
+  colors <- c("#FFFFFF", scales::brewer_pal("seq", "Set1")(4), "#000000")
+  expect_equal(set_text_color(colors), c("#000000", rep("#FFFFFF", 5)))
+})

tests/testthat/test-set_text_color.R

-context("test-set_text_color")
-
-test_that("correct color selection", {
-  colors <- c("#FFFFFF", "#9E788C", "#B679E5", "#4BB757",
-              "#000000", "#0027D8", "#E6071B", "#495B3F")
-  expect_equal(set_text_color(colors), c(rep("#000000", 4), rep("#FFFFFF", 4)))
-})