context("With")
test_that("with_envvar sets and unsets variables", {
# Make sure the "set_env_testvar" environment var is not set.
Sys.unsetenv("set_env_testvar")
expect_false("set_env_testvar" %in% names(Sys.getenv()))
# Use with_envvar (which calls set_envvar) to temporarily set it to 1
expect_identical("1", with_envvar(c("set_env_testvar" = 1),
Sys.getenv("set_env_testvar")))
# set_env_testvar shouldn't stay in the list of environment vars
expect_false("set_env_testvar" %in% names(Sys.getenv()))
})
test_that("with_envar respects suffix and prefix", {
nested <- function(op1, op2) {
with_envvar(c(A = 1), action = op1,
with_envvar(c(A = 2), action = op2,
Sys.getenv("A")[[1]]
)
)
}
expect_equal(nested("replace", "suffix"), c("1 2"))
expect_equal(nested("replace", "prefix"), c("2 1"))
expect_equal(nested("prefix", "suffix"), c("1 2"))
expect_equal(nested("prefix", "prefix"), c("2 1"))
expect_equal(nested("suffix", "suffix"), c("1 2"))
expect_equal(nested("suffix", "prefix"), c("2 1"))
})
test_that("with_options works", {
expect_false(identical(getOption("scipen"), 999))
expect_equal(with_options(c(scipen=999), getOption("scipen")), 999)
expect_false(identical(getOption("scipen"), 999))
expect_false(identical(getOption("zyxxyzyx"), "qwrbbl"))
expect_equal(with_options(c(zyxxyzyx="qwrbbl"), getOption("zyxxyzyx")), "qwrbbl")
expect_false(identical(getOption("zyxxyzyx"), "qwrbbl"))
})
test_that("with_libpaths works and resets library", {
lib <- .libPaths()
new_lib <- "."
with_libpaths(
new_lib,
{
expect_equal(normalizePath(new_lib), normalizePath(.libPaths()[[1L]]))
}
)
expect_equal(lib, .libPaths())
})
test_that("with_temp_libpaths works and resets library", {
lib <- .libPaths()
with_temp_libpaths(
expect_equal(.libPaths()[-1], lib)
)
expect_equal(lib, .libPaths())
})
test_that("with_ works", {
res <- NULL
set <- function(new) {
res <<- c(res, 1L)
}
reset <- function(old) {
res <<- c(res, 3L)
}
with_res <- with_(set, reset)
with_res(NULL, res <- c(res, 2L))
expect_equal(res, 1L:3L)
})
test_that("with_ works on functions without arguments", {
res <- NULL
set <- function() {
res <<- c(res, 1L)
}
reset <- function(x) {
res <<- c(res, 3L)
}
with_res <- with_(set, reset)
with_res(res <- c(res, 2L))
expect_equal(res, 1L:3L)
})
test_that("with_path works and resets path", {
current <- normalizePath(get_path(), mustWork = FALSE)
new_path <- normalizePath(".")
with_path(
new_path,
{
expect_equal(normalizePath(new_path), head(get_path(), n = 1))
expect_equal(length(get_path()), length(current) + 1L)
}
)
expect_equal(current, get_path())
})
test_that("with_path with suffix action works and resets path", {
current <- normalizePath(get_path(), mustWork = FALSE)
new_path <- normalizePath(".")
with_path(
new_path,
action = "suffix",
{
expect_equal(normalizePath(new_path), tail(get_path(), n = 1))
expect_equal(length(get_path()), length(current) + 1L)
}
)
expect_equal(current, get_path())
})
test_that("with_path with replace action works and resets path", {
current <- normalizePath(get_path(), mustWork = FALSE)
new_path <- normalizePath(".")
with_path(
new_path,
action = "replace",
{
expect_equal(normalizePath(new_path), get_path())
expect_equal(length(get_path()), 1L)
}
)
expect_equal(current, get_path())
})
test_that("with_libpaths works and resets library", {
lib <- .libPaths()
new_lib <- "."
with_libpaths(
new_lib,
{
expect_equal(normalizePath(new_lib), normalizePath(.libPaths()[[1L]]))
}
)
expect_equal(lib, .libPaths())
})
test_that("with_locale works and resets locales", {
current <- Sys.getlocale("LC_CTYPE")
new <- "C"
with_locale(
c(LC_CTYPE = new),
{
expect_equal(new, Sys.getlocale("LC_CTYPE"))
}
)
expect_equal(current, Sys.getlocale("LC_CTYPE"))
})
test_that("with_locale fails with LC_ALL", {
expect_error(with_locale(c(LC_ALL = "C"), NULL), "LC_ALL")
})
test_that("with_collate works and resets collate", {
current <- Sys.getlocale("LC_COLLATE")
new <- "C"
with_collate(
new,
{
expect_equal(new, Sys.getlocale("LC_COLLATE"))
}
)
expect_equal(current, Sys.getlocale("LC_COLLATE"))
})
test_that("with_makevars works and resets the Makevars file", {
current <- tempfile()
writeLines(con = current, c("CFLAGS=-03"), sep = "\n")
new <- c(CFLAGS = "-O0")
with_makevars(
new, path = current,
{
expect_equal("CFLAGS=-O0", readLines(Sys.getenv("R_MAKEVARS_USER")))
}
)
expect_equal("CFLAGS=-03", readLines(current))
})
test_that("with_makevars changes only the defined variables", {
current_name <- tempfile()
current <- c("CFLAGS=-03", "LDFLAGS=-lz")
writeLines(con = current_name, current, sep = "\n")
new <- c(CFLAGS = "-O0")
with_makevars(
new, path = current_name,
{
expect_equal(c("CFLAGS=-O0", "LDFLAGS=-lz"), readLines(Sys.getenv("R_MAKEVARS_USER")))
}
)
expect_equal(current, readLines(current_name))
})
test_that("with_makevars works with alternative assignments", {
current <- tempfile()
writeLines(con = current, c("CFLAGS=-03"), sep = "\n")
new <- c(CFLAGS = "-O0")
with_makevars(
new, path = current, assignment = "+=",
{
expect_equal("CFLAGS+=-O0", readLines(Sys.getenv("R_MAKEVARS_USER")))
}
)
expect_equal("CFLAGS=-03", readLines(current))
})
test_that("set_makevars works as expected", {
expect_equal(set_makevars(character(0)), NULL)
tmp_old <- tempfile()
tmp_new <- tempfile()
# empty old file
set_makevars(c(CFLAGS = "-O3"), tmp_old, tmp_new)
expect_equal(readLines(tmp_new), c("CFLAGS=-O3"))
# non-empty old file without new field
writeLines(con=tmp_old, c("LDFLAGS=-lz"))
set_makevars(c(CFLAGS = "-O3"), tmp_old, tmp_new)
expect_equal(readLines(tmp_new), c("LDFLAGS=-lz", "CFLAGS=-O3"))
# non-empty old file without multiple field definitions (error)
writeLines(con=tmp_old, c("CFLAGS=-O0", "CFLAGS=-O1"))
expect_error(set_makevars(c(CFLAGS = "-O3"), tmp_old, tmp_new))
unlink(tmp_old)
unlink(tmp_new)
})
test_that("with_dir works as expected", {
old <- normalizePath(getwd())
with_dir("..", {
expect_equal(normalizePath(getwd()), normalizePath(file.path(old, "..")))
})
expect_equal(normalizePath(getwd()), normalizePath(old))
})
test_that("with_par works as expected", {
tmp <- tempfile()
pdf(tmp)
on.exit(unlink(tmp), add = TRUE)
old <- par("pty")
with_par(list(pty = "s"), {
expect_equal(par("pty"), "s")
})
expect_equal(par("pty"), old)
dev.off()
})
test_that("with_seed works as expected", {
expect_identical(
with_preserve_seed(runif(10L)),
runif(10L))
expect_identical(
with_preserve_seed(runif(10L)),
with_preserve_seed(runif(10L)))
expect_identical(
with_seed(1L, runif(10L)),
with_seed(1L, runif(10L)))
expect_false(with_seed(1L, runif(1L)) == runif(1L))
expect_false(with_seed(sample.int(.Machine$integer.max, 1), runif(1L)) ==
with_seed(sample.int(.Machine$integer.max, 1), runif(1L)))
})
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