some CI are shaky, use try-catch more efficient

Author: scivision

+stdlib/+java/filesystem_type.m

@@ -1,8 +1,16 @@
+%% JAVA.FILESYSTEM_TYPE
+%
+% if stdlib.exists() was not adequate here, as on some CI systems, say Windows with Matlab
+% R2025a, despite the same setup on a laptop working.
+% stdlib.exists() was true, the Java function threw java.nio.file.NoSuchFileException.
+%
+% this try-catch is faster and more robust
+
 function t = filesystem_type(file)
 
-if stdlib.exists(file)
+try
   t = char(java.nio.file.Files.getFileStore(javaPathObject(file)).type);
-else
+catch
   t = '';
 end
 

+stdlib/+java/get_owner.m

@@ -1,19 +1,23 @@
 %% JAVA.GET_OWNER get owner of file
+%
+%% JAVA.FILESYSTEM_TYPE
+%
+% if stdlib.exists() was not adequate here, as on some CI systems, say Windows with Matlab
+% R2025a, despite the same setup on a laptop working.
+% stdlib.exists() was true, the Java function threw java.nio.file.NoSuchFileException.
+%
+% this try-catch is faster and more robust
 
 function n = get_owner(p)
 
 % https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/nio/file/Files.html#getOwner(java.nio.file.Path,java.nio.file.LinkOption...)
 % https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/nio/file/LinkOption.html
 
-if stdlib.exists(p)
+try
   opt = java.nio.file.LinkOption.values();
-  n = char(java.nio.file.Files.getOwner(javaPathObject(p), opt));
-else
-  n = '';
-end
-
-try %#ok<TRYNC>
-  n = string(n);
+  n = string(java.nio.file.Files.getOwner(javaPathObject(p), opt));
+catch
+  n = "";
 end
 
 end

test/TestDisk.m

@@ -126,14 +126,14 @@ function test_remove_file(tc)
 
 
 function test_inode_device(tc, java_python_sys, id_name)
-n = "stdlib." + java_python_sys + "." + id_name;
+
 h = str2func("stdlib." + id_name);
-tc.assertNotEmpty(which(n))
 
 try
     ip = h(pwd(), java_python_sys);
     tc.verifyClass(ip, 'uint64')
     tc.verifyGreaterThan(ip, 0)
+
     tc.verifyEqual(h(".", java_python_sys), ip)
 catch e
   tc.verifyEqual(e.identifier, 'stdlib:hbackend:NameError', e.message)