// Create test directory structure
        File baseDir = new File(tempDir.toFile(), "images");
        baseDir.mkdirs();
        File validFile = new File(baseDir, "test.png");

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

    @Test
    public void test_isValidUploadPath_validSubdirectory() throws Exception {