Replace udunits2::ud.is.parseable with PEcAn.utils::unit_is_parseable

CITATION.cff

@@ -59,6 +59,7 @@ authors:
     orcid: 'https://orcid.org/0000-0002-5845-5628'
   - given-names: Ayush Pradad
   - given-names: Shashank Singh
+  - given-names: Tanishq Jain
   - affiliation: Boston University
     given-names: Alexis Helgeson
   - affiliation: Pacific Northwest National Laboratory / University of Maryland

base/utils/DESCRIPTION

@@ -21,6 +21,8 @@ Authors@R: c(person("Mike", "Dietze", role = c("aut"),
                      email = "shashanksingh819@gmail.com"),
              person("Chris", "Black", role = c("aut"),
                      email = "chris@ckblack.org"),
+             person("Tanishq", "Jain", role = c("aut"),
+                     email = "tanishqjain010@gmail.com"),
              person("University of Illinois, NCSA", role = c("cph")))
 Description: The Predictive Ecosystem Carbon Analyzer
     (PEcAn) is a scientific workflow management tool that

base/utils/NAMESPACE

@@ -55,6 +55,7 @@ export(trait.lookup)
 export(transformstats)
 export(tryl)
 export(ud_convert)
+export(unit_is_parseable)
 export(units_are_equivalent)
 export(vecpaste)
 export(zero.truncate)

base/utils/R/unit_is_parseable.R

@@ -0,0 +1,17 @@
+##' Check whether a unit string is parseable
+##' 
+##' Function will replace the now-unmaintained `udunits2::ud.is.parseable`
+##' @author Tanishq Jain
+##' 
+##' @param u1 A character string representing a type of units
+##' 
+##' @return TRUE if the units is parseable, FALSE otherwise.
+##' @export
+unit_is_parseable <- function(u1){
+  tryCatch({
+    if(units::as_units(u1))
+      return(TRUE)
+  },
+  error = function(e) FALSE
+  )
+} # unit_is_parseable

base/utils/tests/testthat/test-unit_is_parseable.R

@@ -0,0 +1,20 @@
+test_that("parseable unit", {
+  expect_true(unit_is_parseable("miles"))
+  expect_true(unit_is_parseable("   K   "))
+  expect_true(unit_is_parseable("10cm"))
+  expect_true(unit_is_parseable("m/s"))
+  expect_true(unit_is_parseable("kg"))
+})
+
+test_that("Non-paresable unit", {
+  expect_false(unit_is_parseable("fake"))
+  expect_false(unit_is_parseable("gk"))
+  expect_false(unit_is_parseable(NULL))
+  expect_false(unit_is_parseable("Not parseable"))
+  expect_false(unit_is_parseable("Loading"))
+})
+
+# This differ from `udunits2::ud.is.parseable`
+#test_that("incompatiable unit to parse", {
+#  expect_error(unit_is_parseable(""))
+#})