assertFalse(cos.done);
        assertFalse(cos.isInMemory());
        cos.close();
        assertFalse(cos.done);
        assertFalse(cos.getFile().exists());
    }

    @Test
    public void testThresholdZero() throws IOException {
        // With threshold 0, everything should go to file immediately
        ContentOutputStream cos = new ContentOutputStream(0, Curl.tmpDir);
        cos.write(new byte[] { 1 });