} catch (final IllegalArgumentException e) {
            // Expected
        }
    }

    /**
     * Test isPathSafe with null path throws exception
     */
    @Test
    public void testIsPathSafe_NullPath() {
        final Path baseDir = tempFolder.getRoot().toPath();
        try {
            FileUtil.isPathSafe((Path) null, baseDir);
            fail("Expected IllegalArgumentException");