Boolean result = invokeIsValidUploadPath(validFile, baseDir);
        assertTrue("Valid path within base directory should be allowed", result);
    }

    @Test
    public void test_isValidUploadPath_validSubdirectory() throws Exception {
        // Create test directory structure with subdirectory
        File baseDir = new File(tempDir.toFile(), "images");
        File subDir = new File(baseDir, "icons");