Exemple #1
0
void test_nghttp2_hd_deflate_same_indexed_repr(void) {
  nghttp2_hd_deflater deflater;
  nghttp2_hd_inflater inflater;
  nghttp2_nv nva1[] = {MAKE_NV("cookie", "alpha"), MAKE_NV("cookie", "alpha")};
  nghttp2_nv nva2[] = {MAKE_NV("cookie", "alpha"), MAKE_NV("cookie", "alpha"),
                       MAKE_NV("cookie", "alpha")};
  nghttp2_bufs bufs;
  ssize_t blocklen;
  nva_out out;
  int rv;
  nghttp2_mem *mem;

  mem = nghttp2_mem_default();
  frame_pack_bufs_init(&bufs);

  nva_out_init(&out);
  CU_ASSERT(0 == nghttp2_hd_deflate_init(&deflater, mem));
  CU_ASSERT(0 == nghttp2_hd_inflate_init(&inflater, mem));

  /* Encode 2 same headers.  Emit 1 literal reprs and 1 index repr. */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva1, ARRLEN(nva1));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(2 == out.nvlen);
  assert_nv_equal(nva1, out.nva, 2, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Encode 3 same headers.  This time, emits 3 index reprs. */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva2, ARRLEN(nva2));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen == 3);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(3 == out.nvlen);
  assert_nv_equal(nva2, out.nva, 3, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Cleanup */
  nghttp2_bufs_free(&bufs);
  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);
}
Exemple #2
0
static void check_deflate_inflate(nghttp2_hd_deflater *deflater,
                                  nghttp2_hd_inflater *inflater,
                                  nghttp2_nv *nva, size_t nvlen,
                                  nghttp2_mem *mem) {
  nghttp2_bufs bufs;
  ssize_t blocklen;
  nva_out out;
  int rv;

  frame_pack_bufs_init(&bufs);

  nva_out_init(&out);
  rv = nghttp2_hd_deflate_hd_bufs(deflater, &bufs, nva, nvlen);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen >= 0);

  CU_ASSERT(blocklen == inflate_hd(inflater, &out, &bufs, 0, mem));

  CU_ASSERT(nvlen == out.nvlen);
  assert_nv_equal(nva, out.nva, nvlen, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_free(&bufs);
}
Exemple #3
0
void test_nghttp2_hd_deflate_bound(void) {
  nghttp2_hd_deflater deflater;
  nghttp2_nv nva[] = {MAKE_NV(":method", "GET"), MAKE_NV("alpha", "bravo")};
  nghttp2_bufs bufs;
  size_t bound, bound2;
  nghttp2_mem *mem;

  mem = nghttp2_mem_default();
  frame_pack_bufs_init(&bufs);

  nghttp2_hd_deflate_init(&deflater, mem);

  bound = nghttp2_hd_deflate_bound(&deflater, nva, ARRLEN(nva));

  CU_ASSERT(12 + 6 * 2 * 2 + nva[0].namelen + nva[0].valuelen + nva[1].namelen +
                nva[1].valuelen ==
            bound);

  nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, ARRLEN(nva));

  CU_ASSERT(bound > (size_t)nghttp2_bufs_len(&bufs));

  bound2 = nghttp2_hd_deflate_bound(&deflater, nva, ARRLEN(nva));

  CU_ASSERT(bound == bound2);

  nghttp2_bufs_free(&bufs);
  nghttp2_hd_deflate_free(&deflater);
}
Exemple #4
0
void test_nghttp2_hd_ringbuf_reserve(void) {
  nghttp2_hd_deflater deflater;
  nghttp2_hd_inflater inflater;
  nghttp2_nv nv;
  nghttp2_bufs bufs;
  nva_out out;
  int i;
  ssize_t rv;
  ssize_t blocklen;
  nghttp2_mem *mem;

  mem = nghttp2_mem_default();
  frame_pack_bufs_init(&bufs);
  nva_out_init(&out);

  nv.flags = NGHTTP2_NV_FLAG_NONE;
  nv.name = (uint8_t *)"a";
  nv.namelen = strlen((const char *)nv.name);
  nv.valuelen = 4;
  nv.value = mem->malloc(nv.valuelen + 1, NULL);
  memset(nv.value, 0, nv.valuelen);

  nghttp2_hd_deflate_init2(&deflater, 8000, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  nghttp2_hd_inflate_change_table_size(&inflater, 8000);
  nghttp2_hd_deflate_change_table_size(&deflater, 8000);

  for (i = 0; i < 150; ++i) {
    memcpy(nv.value, &i, sizeof(i));
    rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, &nv, 1);
    blocklen = nghttp2_bufs_len(&bufs);

    CU_ASSERT(0 == rv);
    CU_ASSERT(blocklen > 0);

    CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

    CU_ASSERT(1 == out.nvlen);
    assert_nv_equal(&nv, out.nva, 1, mem);

    nva_out_reset(&out, mem);
    nghttp2_bufs_reset(&bufs);
  }

  nghttp2_bufs_free(&bufs);
  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);

  mem->free(nv.value, NULL);
}
Exemple #5
0
void test_nghttp2_hd_no_index(void) {
  nghttp2_hd_deflater deflater;
  nghttp2_hd_inflater inflater;
  nghttp2_bufs bufs;
  ssize_t blocklen;
  nghttp2_nv nva[] = {
      MAKE_NV(":method", "GET"), MAKE_NV(":method", "POST"),
      MAKE_NV(":path", "/foo"),  MAKE_NV("version", "HTTP/1.1"),
      MAKE_NV(":method", "GET"),
  };
  size_t i;
  nva_out out;
  int rv;
  nghttp2_mem *mem;

  mem = nghttp2_mem_default();

  /* 1st :method: GET can be indexable, last one is not */
  for (i = 1; i < ARRLEN(nva); ++i) {
    nva[i].flags = NGHTTP2_NV_FLAG_NO_INDEX;
  }

  frame_pack_bufs_init(&bufs);

  nva_out_init(&out);

  nghttp2_hd_deflate_init(&deflater, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, ARRLEN(nva));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(ARRLEN(nva) == out.nvlen);
  assert_nv_equal(nva, out.nva, ARRLEN(nva), mem);

  CU_ASSERT(out.nva[0].flags == NGHTTP2_NV_FLAG_NONE);
  for (i = 1; i < ARRLEN(nva); ++i) {
    CU_ASSERT(out.nva[i].flags == NGHTTP2_NV_FLAG_NO_INDEX);
  }

  nva_out_reset(&out, mem);

  nghttp2_bufs_free(&bufs);
  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);
}
Exemple #6
0
static int deflate_inflate(nghttp2_hd_deflater *deflater,
                           nghttp2_hd_inflater *inflater, nghttp2_bufs *bufs,
                           nghttp2_nv *nva, size_t nvlen, nghttp2_mem *mem) {
  int rv;

  rv = nghttp2_hd_deflate_hd_bufs(deflater, bufs, nva, nvlen);

  if (rv != 0) {
    return rv;
  }

  rv = (int)inflate_hd(inflater, NULL, bufs, 0, mem);

  if (rv < 0) {
    return rv;
  }

  nghttp2_bufs_reset(bufs);

  return 0;
}
Exemple #7
0
void test_nghttp2_hd_change_table_size(void) {
  nghttp2_hd_deflater deflater;
  nghttp2_hd_inflater inflater;
  nghttp2_nv nva[] = {MAKE_NV("alpha", "bravo"), MAKE_NV("charlie", "delta")};
  nghttp2_nv nva2[] = {MAKE_NV(":path", "/")};
  nghttp2_bufs bufs;
  ssize_t rv;
  nva_out out;
  ssize_t blocklen;
  nghttp2_mem *mem;

  mem = nghttp2_mem_default();
  frame_pack_bufs_init(&bufs);

  nva_out_init(&out);

  nghttp2_hd_deflate_init(&deflater, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  /* inflater changes notifies 8000 max header table size */
  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 8000));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 8000));

  CU_ASSERT(4096 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(8000 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(8000 == inflater.settings_hd_table_bufsize_max);

  /* This will emit encoding context update with header table size 4096 */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(2 == deflater.ctx.hd_table.len);
  CU_ASSERT(4096 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(2 == inflater.ctx.hd_table.len);
  CU_ASSERT(4096 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(8000 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* inflater changes header table size to 1024 */
  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 1024));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 1024));

  CU_ASSERT(1024 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(1024 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(1024 == inflater.settings_hd_table_bufsize_max);

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(2 == deflater.ctx.hd_table.len);
  CU_ASSERT(1024 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(2 == inflater.ctx.hd_table.len);
  CU_ASSERT(1024 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(1024 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* inflater changes header table size to 0 */
  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 0));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 0));

  CU_ASSERT(0 == deflater.ctx.hd_table.len);
  CU_ASSERT(0 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(0 == inflater.ctx.hd_table.len);
  CU_ASSERT(0 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(0 == inflater.settings_hd_table_bufsize_max);

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(0 == deflater.ctx.hd_table.len);
  CU_ASSERT(0 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(0 == inflater.ctx.hd_table.len);
  CU_ASSERT(0 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(0 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  nghttp2_bufs_free(&bufs);
  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);

  /* Check table buffer is expanded */
  frame_pack_bufs_init(&bufs);

  nghttp2_hd_deflate_init2(&deflater, 8192, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  /* First inflater changes header table size to 8000 */
  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 8000));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 8000));

  CU_ASSERT(8000 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(8000 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(8000 == inflater.settings_hd_table_bufsize_max);

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(2 == deflater.ctx.hd_table.len);
  CU_ASSERT(8000 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(2 == inflater.ctx.hd_table.len);
  CU_ASSERT(8000 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(8000 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 16383));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 16383));

  CU_ASSERT(8192 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(16383 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(16383 == inflater.settings_hd_table_bufsize_max);

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(2 == deflater.ctx.hd_table.len);
  CU_ASSERT(8192 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(2 == inflater.ctx.hd_table.len);
  CU_ASSERT(8192 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(16383 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Lastly, check the error condition */

  rv = nghttp2_hd_emit_table_size(&bufs, 25600);
  CU_ASSERT(rv == 0);
  CU_ASSERT(NGHTTP2_ERR_HEADER_COMP ==
            inflate_hd(&inflater, &out, &bufs, 0, mem));

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);

  /* Check that encoder can handle the case where its allowable buffer
     size is less than default size, 4096 */
  nghttp2_hd_deflate_init2(&deflater, 1024, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  CU_ASSERT(1024 == deflater.ctx.hd_table_bufsize_max);

  /* This emits context update with buffer size 1024 */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(2 == deflater.ctx.hd_table.len);
  CU_ASSERT(1024 == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(2 == inflater.ctx.hd_table.len);
  CU_ASSERT(1024 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(4096 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);

  /* Check that table size UINT32_MAX can be received */
  nghttp2_hd_deflate_init2(&deflater, UINT32_MAX, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, UINT32_MAX));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, UINT32_MAX));

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva, 2);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(UINT32_MAX == deflater.ctx.hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(UINT32_MAX == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(UINT32_MAX == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);

  /* Check that context update emitted twice */
  nghttp2_hd_deflate_init2(&deflater, 4096, mem);
  nghttp2_hd_inflate_init(&inflater, mem);

  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 0));
  CU_ASSERT(0 == nghttp2_hd_inflate_change_table_size(&inflater, 3000));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 0));
  CU_ASSERT(0 == nghttp2_hd_deflate_change_table_size(&deflater, 3000));

  CU_ASSERT(0 == deflater.min_hd_table_bufsize_max);
  CU_ASSERT(3000 == deflater.ctx.hd_table_bufsize_max);

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva2, 1);
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(3 < blocklen);
  CU_ASSERT(3000 == deflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(UINT32_MAX == deflater.min_hd_table_bufsize_max);

  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));
  CU_ASSERT(3000 == inflater.ctx.hd_table_bufsize_max);
  CU_ASSERT(3000 == inflater.settings_hd_table_bufsize_max);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);

  nghttp2_bufs_free(&bufs);
}
Exemple #8
0
void test_nghttp2_hd_deflate(void) {
  nghttp2_hd_deflater deflater;
  nghttp2_hd_inflater inflater;
  nghttp2_nv nva1[] = {MAKE_NV(":path", "/my-example/index.html"),
                       MAKE_NV(":scheme", "https"), MAKE_NV("hello", "world")};
  nghttp2_nv nva2[] = {MAKE_NV(":path", "/script.js"),
                       MAKE_NV(":scheme", "https")};
  nghttp2_nv nva3[] = {MAKE_NV("cookie", "k1=v1"), MAKE_NV("cookie", "k2=v2"),
                       MAKE_NV("via", "proxy")};
  nghttp2_nv nva4[] = {MAKE_NV(":path", "/style.css"),
                       MAKE_NV("cookie", "k1=v1"), MAKE_NV("cookie", "k1=v1")};
  nghttp2_nv nva5[] = {MAKE_NV(":path", "/style.css"),
                       MAKE_NV("x-nghttp2", "")};
  nghttp2_bufs bufs;
  ssize_t blocklen;
  nva_out out;
  int rv;
  nghttp2_mem *mem;

  mem = nghttp2_mem_default();
  frame_pack_bufs_init(&bufs);

  nva_out_init(&out);
  CU_ASSERT(0 == nghttp2_hd_deflate_init(&deflater, mem));
  CU_ASSERT(0 == nghttp2_hd_inflate_init(&inflater, mem));

  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva1, ARRLEN(nva1));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(3 == out.nvlen);
  assert_nv_equal(nva1, out.nva, 3, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Second headers */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva2, ARRLEN(nva2));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(2 == out.nvlen);
  assert_nv_equal(nva2, out.nva, 2, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Third headers, including same header field name, but value is not
     the same. */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva3, ARRLEN(nva3));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(3 == out.nvlen);
  assert_nv_equal(nva3, out.nva, 3, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Fourth headers, including duplicate header fields. */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva4, ARRLEN(nva4));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(3 == out.nvlen);
  assert_nv_equal(nva4, out.nva, 3, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Fifth headers includes empty value */
  rv = nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, nva5, ARRLEN(nva5));
  blocklen = nghttp2_bufs_len(&bufs);

  CU_ASSERT(0 == rv);
  CU_ASSERT(blocklen > 0);
  CU_ASSERT(blocklen == inflate_hd(&inflater, &out, &bufs, 0, mem));

  CU_ASSERT(2 == out.nvlen);
  assert_nv_equal(nva5, out.nva, 2, mem);

  nva_out_reset(&out, mem);
  nghttp2_bufs_reset(&bufs);

  /* Cleanup */
  nghttp2_bufs_free(&bufs);
  nghttp2_hd_inflate_free(&inflater);
  nghttp2_hd_deflate_free(&deflater);
}