further correct canonical

Author: scivision

+stdlib/canonical.m

@@ -35,8 +35,10 @@
 if stdlib.exists(c, use_java)
   if stdlib.isoctave()
     c = canonicalize_file_name(c);
+  elseif use_java
+    c = javaFileObject(c).getCanonicalPath();
   else
-    % errors if path does not exist. Errors on leading ~
+    % errors if any component of path does not exist. Errors on leading ~
     c = builtin('_canonicalizepath', c);
   end
 elseif stdlib.len(c)

+stdlib/filesystem_type.m

@@ -1,6 +1,9 @@
 %% FILESYSTEM_TYPE tell type of filesystem
 %
 % example outputs: ntfs, ext4, apfs, ...
+%
+% if empty output or error, try specifying the drive root
+% like "/" or "C:/"
 
 function t = filesystem_type(p)
 arguments

test/TestCanonical.m

@@ -6,7 +6,7 @@
 p = {{"", ""}, {"not-exist", "not-exist"}, {"a/../b", "b"}, ...
 {"~", stdlib.homedir()}, {"~/", stdlib.homedir()}, ...
 {"~/..", stdlib.parent(stdlib.homedir())}, ...
-{mfilename("fullpath") + "/..", stdlib.parent(mfilename("fullpath"))}};
+{mfilename("fullpath") + ".m/..", stdlib.parent(mfilename("fullpath"))}};
 end
 
 

test/TestJava.m

@@ -47,7 +47,7 @@ function test_java_version(tc)
 
 function test_java_api(tc)
 v = stdlib.java_api();
-tc.verifyGreaterThanOrEqual(v, 8)
+tc.verifyGreaterThanOrEqual(v, 8, "Java API >= 8 is required for Matlab-stdlib")
 end