Sys.setenv(TZ="")
suppressPackageStartupMessages(library(stars))
matrix(1:4,2)
m = matrix(1:4,2)
s = st_as_stars(m)

s = st_set_dimensions(s, st_dimensions(s), xy = NULL) 
sfc = st_sfc(st_point(0:1), st_point(3:2))
s = st_set_dimensions(s, 1, sfc) |> st_set_crs(4326)
tm = as.POSIXct("2023-03-04 12:35") + c(0, 3600)
(s = st_set_dimensions(s, 2, tm))
f = tempfile(fileext = ".nc")
if (compareVersion(sf_extSoftVersion()["GDAL"], "3.4.0") > -1) {
 write_mdim(s, f, as_float = FALSE)
 s2 = read_mdim(f)
 print(s2)
 print(all.equal(s, s2, check.attributes = FALSE))
 print(all.equal(s, s2))

 st_crs(sfc) = st_crs(s2)
 st_crs(s) = st_crs(s2)
 tm = as.Date("2023-02-25") + 0:1
 sd = st_set_dimensions(s, 2, tm)
 print(sd)
 sd = st_set_dimensions(sd, 1, sfc)
 print(sd)
 f = tempfile(fileext = ".nc")
 write_mdim(sd, f)
 sd2 = read_mdim(f)
 print(sd2)
 print(all.equal(sd, sd2, check.attributes = FALSE))
 print(all.equal(sd, sd2))
}