test:windows_shortpath: more robust compare

Author: scivision

test/TestWindowsCOM.m

@@ -14,7 +14,7 @@ function test_not(tc, Pn)
 function test_short_folder(tc)
 import matlab.unittest.constraints.IsFolder
 
-progdir = stdlib.posix(getenv("PROGRAMFILES"));
+progdir = getenv("PROGRAMFILES");
 if ispc()
   tc.assertThat(progdir, IsFolder, "$Env:PROGRAMFILES is not a directory")
 end
@@ -40,7 +40,12 @@ function test_short_file(tc, Pmr)
   if contains(Pmr, " ")
     tc.verifySubstring(s, "~")
   end
-  tc.verifyEqual(stdlib.canonical(s), stdlib.posix(Pmr), "shortname didn't resolve same as canonical")
+
+  % CI systems like GitHub Actions might not shorten despite long path components
+  tc.verifyLessThanOrEqual(strlength(s), strlength(Pmr))
+
+  tc.verifyTrue(stdlib.samepath(stdlib.canonical(s), Pmr),...
+    sprintf("mex: %d", stdlib.is_mex_fun("stdlib.windows_shortname")))
 else
   tc.verifyEqual(s, string(Pmr))
 end