R Under development (unstable) (2024-08-15 r87022 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(unittest)
> 
> R_binary <- file.path(R.home("bin"), "R")
> 
> run_script <- function(script, expected_status, expected_out, description) {
+     # solaris does not like pipes so use tmp files as intermediaries
+     tmpfiles <- tempfile(pattern = c('R_unittest_stdout_','R_unittest_stderr_'), tmpdir = tempdir())
+     exit_status <- withCallingHandlers(
+         system2(
+             R_binary,
+             c("--vanilla", "--slave"),
+             input = paste0(script, collapse = "\n"),
+             wait = TRUE, stdout = tmpfiles[1], stderr = tmpfiles[2]),
+         warning = function (w) {
+             invokeRestart("muffleWarning")
+         }
+     )
+     actual <- readLines(tmpfiles[1])  # only interested in stdout
+     if( isTRUE(all.equal(actual, expected_out)) && exit_status == expected_status) {
+         cat("ok\n")
+     } else {
+         cat("\nExpected status",
+             expected_status,
+             "\nGot status",
+             exit_status,
+             "\nExpected stdout:",
+             expected_out,
+             "\nGot stdout:",
+             actual,
+             sep = "\n"
+         )
+         stop( description )
+     }
+     invisible(c(exit_status, actual))
+ }
> 
> expect_equal <- function (expr, expected) {
+     actual <- capture.output(expr)
+     if (!identical(all.equal(actual, expected), TRUE)) {
+         stop("ok_group output didn't match: ", actual)
+     }
+ }
> 
> # Expression printed
> expect_equal(ok_group("camels", TRUE), c(
+     "# camels"))
> 
> # Can have multiple lines in a vector
> expect_equal(ok_group(c("camels", "ostriches"), TRUE), c(
+     "# camels",
+     "# ostriches"))
> 
> # Can divide lines with newlines too
> expect_equal(ok_group(c("camels\nbadgers\r\nhoney badgers", "ostriches"), FALSE), c(
+     "# camels",
+     "# badgers",
+     "# honey badgers",
+     "# ostriches"))
> 
> # Expression evaluated after printing section message
> expect_equal(ok_group("camels", print("moo")), c(
+     "# camels",
+     '[1] "moo"'))
> 
> # Return NULL
> expect_equal({
+     if (!is.null(ok_group("camels", 6))) stop("Didn't return NULL")
+ }, c("# camels"))
> 
> run_script('
+     library(unittest)
+     options(unittest.stop_on_fail = FALSE)
+     ok_group("snake", {
+         ok(1==1)
+         ok(1==2)
+         stop("hiss!")
+         ok(1==3)
+     })
+     print("badger")
+ ', 10, c(
+     "# snake",
+     "ok - 1 == 1",
+     "not ok - 1 == 2",
+     "# Test returned non-TRUE value:",
+     "# [1] FALSE",
+     "not ok - ok_group 'snake'",
+     "# Exception: hiss!",
+     "# Traceback:",
+     '#  1: stop("hiss!")',
+     '[1] "badger"',
+     "1..3",
+     "# Looks like you failed 1 of 2 tests.",
+     "# 2: 1 == 2",
+     "# Looks like 1 groups raised an exception.",
+     "# 1: ok_group 'snake'",
+     NULL ), "Execution continues after an exception, if stop_on_fail FALSE")
ok
> 
> run_script('
+     library(unittest)
+     options(unittest.stop_on_fail = TRUE)
+     ok_group("snake", stop("hiss!"))
+     print("badger")
+ ', 11, c(
+     "# snake",
+     "not ok - ok_group 'snake'",
+     "# Exception: hiss!",
+     "# Traceback:",
+     '#  1: stop("hiss!")',
+     "Bail out! Looks like 0 tests ran, but a group failed and unittest.stop_on_fail is set",
+     NULL ), "Execution stops after an exception, if stop_on_fail TRUE")
ok
> 
> run_script('
+     library(unittest)
+     options(unittest.stop_on_fail = FALSE)
+     ok_group("snake", reptile <- snake)
+ ', 10, c(
+     "# snake",
+     "not ok - ok_group 'snake'",
+     "# Exception: object 'snake' not found",
+     "# Traceback:",
+     '#  (none)',
+     "1..1",
+     "# Looks like 1 groups raised an exception.",
+     "# 1: ok_group 'snake'",
+     NULL ), "Don't output an empty call stack")
ok
> 
> proc.time()
   user  system elapsed 
   0.25    0.07    1.31