attach(asNamespace("epigrowthfit"))
library(tools)
options(warn = 2L, error = if (interactive()) recover)

data <- data.frame(x = 1:10,
                   y = letters[11:20],
                   z = .Date(0:9),
                   row.names = letters[1:10])


## egf_eval_subset #####################################################

stopifnot(exprs = {
	identical(egf_eval_subset(quote(x > 5L), data), 6:10)
	identical(egf_eval_subset(NULL, data), 1:10)
	identical(egf_eval_subset(1:3, data), 1:3)
	identical(egf_eval_subset(letters[4:6], data = data), 4:6)
})


## egf_eval_select #####################################################

stopifnot(exprs = {
	identical(egf_eval_select(quote(c(x, y)), data), 1:2)
	identical(egf_eval_select(quote(-x), data), 2:3)
	identical(egf_eval_select(NULL, data), integer(0L))
	identical(egf_eval_select(1:2, data), 1:2)
	identical(egf_eval_select(c("y", "z"), data), 2:3)
})


## egf_eval_order ######################################################

stopifnot(exprs = {
	identical(egf_eval_order(quote(order(x, decreasing = TRUE)), data), 10:1)
	identical(egf_eval_order(NULL, data), 1:10)
	identical(egf_eval_order(c(1:5, 10:6), data), c(1:5, 10:6))
})
assertError(egf_eval_order(1:5, data))


## egf_eval_label ######################################################

stopifnot(exprs = {
	identical(egf_eval_label(quote(paste("Date:", z)), data),
	          paste("Date:", data[["z"]]))
	is.null(egf_eval_label(NULL, data))
	identical(egf_eval_label("1", data), rep.int("1", 10L))
	identical(egf_eval_label(1, data), rep.int("1", 10L))
})