Tests to examine:

test/jdk/java/io/File/MaxPath.java
test/jdk/java/io/File/Util.java --- runs on multiple OS platforms
test/jdk/java/io/File/WinMaxPath.java --- done uses @requires (os.family == "windows")
test/jdk/java/io/File/SymLinks.java -- runs on multiple OS platforms (refactor extract method testDOSHiddenAttributes ) DONE
test/jdk/java/io/File/MaxPathLength.java --- runs on multiple OS platforms (refactor extract method testLongPathOnWindows )
test/jdk/java/io/File/WinSpecialFiles.java -- done uses @requires (os.family == "windows")
test/jdk/java/io/File/GetAbsolutePath.java --- runs on multiple OS platforms
test/jdk/java/io/File/SetAccess.java --- runs on multiple OS platforms (refactor extract method testAccessOnUnix, testAccessOnWindows)

test/jdk/java/io/File/SetLastModified.java -- runs on multiple OS platforms, sets a test property based on OS selection
test/jdk/java/io/File/MacPathTest.java -- launched from MacPath (uses @requires (os.family == "Mac"), with locale set
test/jdk/java/io/File/NulFile.java -- runs on multiple OS platforms


test/jdk/java/io/FilePermission/Correctness.java --- runs on multiple OS platforms