R Under development (unstable) (2024-05-22 r86590 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> source("helper/helper.R")
> 
> if (exists("get0", envir = baseenv())) {
+   f = get("get0", envir = baseenv())
+   expect_same = makeCompareFun(f, backports:::get0)
+ 
+   foo = 1
+   ee = new.env()
+   ee$bar = 1
+   ee$foobar = function(x) x^2
+ 
+   expect_same(character(0), ifnotfound = 1)
+   expect_same(NA_character_, ifnotfound = 1)
+   expect_same(factor("a"), ifnotfound = 1)
+ 
+   expect_same("bar")
+   expect_same("bar", ifnotfound = 42)
+   expect_same("foo")
+   expect_same("foo", ifnotfound = 42)
+   expect_same(c("foo", "bar", "iris"), ifnotfound = 42)
+   expect_same(c("bar", "foo", "iris"), ifnotfound = 42)
+   expect_same(c("iris", "foo", "bar"), ifnotfound = 42)
+   expect_same("bar", envir = ee)
+   expect_same("bar", envir = ee, mode = "function")
+   expect_same("bar", envir = ee, mode = "function")
+   expect_same("foobar", envir = ee, mode = "function")
+ }
> 
> proc.time()
   user  system elapsed 
   0.21    0.06    0.26