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

    @Test
    public void testThresholdOne() throws IOException {
        // With threshold 1, writing 1 byte should stay in memory
        ContentOutputStream cos = new ContentOutputStream(1, Curl.tmpDir);
        cos.write(new byte[] { 1 });