assertFalse(cos.isInMemory());
        File file = cos.getFile();
        assertTrue(file.exists());
        cos.close();
    }

    @Test
    public void testLargeThreshold() throws IOException {
        // Test with very large threshold
        ContentOutputStream cos = new ContentOutputStream(1024 * 1024, Curl.tmpDir);
        cos.write(new byte[1000]);