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test_that("stringsAsFactors doesn't affect results", {
skip_if(as.integer(R.Version()$major) >= 4L, "stringsAsFactors only affects R <4.0")
old <- getOption("stringsAsFactors")
on.exit(options(stringsAsFactors = old), add = TRUE)
dat.character <- data_frame(x = letters[5:1], y = 1:5)
dat.factor <- data_frame(x = letters[5:1], y = 1:5)
base <- ggplot(mapping = aes(x, y)) + geom_point()
xlabels <- function(x) x$layout$panel_params[[1]]$x$get_labels()
options(stringsAsFactors = TRUE)
char_true <- ggplot_build(base %+% dat.character)
factor_true <- ggplot_build(base %+% dat.factor)
options(stringsAsFactors = FALSE)
char_false <- ggplot_build(base %+% dat.character)
factor_false <- ggplot_build(base %+% dat.factor)
expect_equal(xlabels(char_true), letters[1:5])
expect_equal(xlabels(char_false), letters[1:5])
expect_equal(xlabels(factor_true), letters[1:5])
expect_equal(xlabels(factor_false), letters[1:5])
})
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