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

    @Test
    public void testEmptyWrite() throws IOException {
        // Writing empty array should work
        ContentOutputStream cos = new ContentOutputStream(10, Curl.tmpDir);
        cos.write(new byte[] {});
        assertTrue(cos.isInMemory());