R Under development (unstable) (2024-10-19 r87247 ucrt) -- "Unsuffered Consequences"
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> ## git2r, R bindings to the libgit2 library.
> ## Copyright (C) 2013-2023 The git2r contributors
> ##
> ## This program is free software; you can redistribute it and/or modify
> ## it under the terms of the GNU General Public License, version 2,
> ## as published by the Free Software Foundation.
> ##
> ## git2r is distributed in the hope that it will be useful,
> ## but WITHOUT ANY WARRANTY; without even the implied warranty of
> ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> ## GNU General Public License for more details.
> ##
> ## You should have received a copy of the GNU General Public License along
> ## with this program; if not, write to the Free Software Foundation, Inc.,
> ## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
> 
> library(git2r)
> 
> ## For debugging
> sessionInfo()
R Under development (unstable) (2024-10-19 r87247 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows Server 2022 x64 (build 20348)

Matrix products: default


locale:
[1] LC_COLLATE=C                 LC_CTYPE=German_Germany.utf8
[3] LC_MONETARY=C                LC_NUMERIC=C                
[5] LC_TIME=C                   

time zone: Europe/Berlin
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] git2r_0.35.0

loaded via a namespace (and not attached):
[1] compiler_4.5.0
> libgit2_version()
$major
[1] 1

$minor
[1] 7

$rev
[1] 2

> libgit2_features()
$threads
[1] TRUE

$https
[1] TRUE

$ssh
[1] FALSE

> 
> 
> ## Test to coerce
> git_t <- structure(list(time = 1395567947, offset = 60),
+                    class = "git_time")
> stopifnot(identical(as.character(git_t), "2014-03-23 09:45:47 GMT"))
> stopifnot(identical(as.character(git_t, usetz = FALSE), "2014-03-23 09:45:47"))
> stopifnot(identical(as.POSIXct(git_t),
+                     as.POSIXct(1395567947, tz = "GMT", origin = "1970-01-01")))
> stopifnot(identical(print(git_t), git_t))
2014-03-23 09:45:47 GMT
> 
> as.POSIXct(1395567947, origin = "1970-01-01", tz = "-03")
[1] "2014-03-23 12:45:47"
Warning message:
In as.POSIXlt.POSIXct(x, tz) : unknown timezone '-03'
> 
> ## Test that origin/tz can be passed to as.POSIXct
> stopifnot(identical(as.POSIXct(git_t, tz = "Europe/Stockholm",
+                                origin = "1980-02-02"),
+                     as.POSIXct(1395567947, tz = "Europe/Stockholm",
+                                origin = "1980-02-02")))
> 
> ## Test that origin/tz can be passed to as.character
> stopifnot(identical(as.character(git_t, tz = "Europe/Stockholm",
+                                  origin = "1980-02-02"),
+                     "2024-04-23 11:45:47 CEST"))
> stopifnot(identical(as.character(git_t, tz = "Europe/Stockholm",
+                                  origin = "1980-02-02", usetz = FALSE),
+                     "2024-04-23 11:45:47"))
> 
> ## Test that origin/tz can be passed to print
> stopifnot(identical(
+     utils::capture.output(print(git_t, tz = "Europe/Stockholm",
+                                 origin = "1980-02-02")),
+     "2024-04-23 11:45:47 CEST"
+ ))
> stopifnot(identical(
+     utils::capture.output(print(git_t, tz = "Europe/Stockholm",
+                                 origin = "1980-02-02", usetz = FALSE)),
+     "2024-04-23 11:45:47"
+ ))
> 
> proc.time()
   user  system elapsed 
   0.21    0.14    0.32