rps: added test for sampler element

diff --git a/src/rps/test_service_rps_sampler_elem.c b/src/rps/test_service_rps_sampler_elem.c
new file mode 100644 (file)
index 0000000..6f515d2
--- /dev/null
+++ b/src/rps/test_service_rps_sampler_elem.c
@@ -0,0 +1,205 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+     Boston, MA 02110-1301, USA.
+*/
+/**
+ * @file rps/test_service_rps_sampler_elem.c
+ * @brief testcase for gnunet-service-rps_sampler_elem.c
+ */
+#include <platform.h>
+#include "gnunet_util_lib.h"
+#include "gnunet-service-rps_sampler_elem.h"
+
+#define ABORT() { fprintf(stderr, "Error at %s:%d\n", __FILE__, __LINE__); return 1; }
+#define CHECK(c) { if (! (c)) ABORT(); }
+
+
+static int
+check ()
+{
+  struct GNUNET_PeerIdentity pid0;
+  struct GNUNET_PeerIdentity pid1;
+  struct RPS_SamplerElement *s_elem;
+  struct GNUNET_CRYPTO_AuthKey auth_key;
+  struct GNUNET_CRYPTO_AuthKey auth_key2;
+  struct GNUNET_HashCode hash_code;
+  struct GNUNET_HashCode hash_code2;
+
+  memset (&pid0, 1, sizeof (pid0));
+  memset (&pid1, 0, sizeof (pid1));
+
+  /* Check if creation and destruction of an
+   * (empty) sampler element works */
+  s_elem = RPS_sampler_elem_create ();
+  CHECK (NULL != s_elem);
+  CHECK (EMPTY == s_elem->is_empty);
+  CHECK (NULL != &s_elem->auth_key);
+  auth_key = s_elem->auth_key;
+  RPS_sampler_elem_destroy (s_elem);
+
+
+  /* Check creation of another sampler element
+   * yields another (random) key */
+  s_elem = RPS_sampler_elem_create ();
+  CHECK (NULL != s_elem);
+  CHECK (EMPTY == s_elem->is_empty);
+  CHECK (NULL != &s_elem->auth_key);
+  CHECK (auth_key.key != s_elem->auth_key.key);
+  CHECK (0 != memcmp (auth_key.key, s_elem->auth_key.key, GNUNET_CRYPTO_HASH_LENGTH));
+  auth_key = s_elem->auth_key;
+
+  /* Check that reinitialisation
+   * yields another (random) key */
+  RPS_sampler_elem_reinit (s_elem);
+  CHECK (NULL != s_elem);
+  CHECK (EMPTY == s_elem->is_empty);
+  CHECK (NULL != &s_elem->auth_key);
+  CHECK (auth_key.key != s_elem->auth_key.key);
+  CHECK (0 != memcmp (auth_key.key, s_elem->auth_key.key, GNUNET_CRYPTO_HASH_LENGTH));
+  RPS_sampler_elem_destroy (s_elem);
+
+
+  /* Check that input of single peer id
+   * sets valid values */
+  s_elem = RPS_sampler_elem_create ();
+  CHECK (EMPTY == s_elem->is_empty);
+  CHECK (NULL != &s_elem->auth_key);
+  CHECK (auth_key.key != s_elem->auth_key.key);
+  /* This fails only with minimal chance */
+  CHECK (0 != memcmp (auth_key.key, s_elem->auth_key.key, GNUNET_CRYPTO_HASH_LENGTH));
+  auth_key = s_elem->auth_key;
+
+  /* Check also that the hash of the peer id changed
+   * Also fails with minimal probability */
+  hash_code = s_elem->peer_id_hash;
+  RPS_sampler_elem_next (s_elem, &pid0);
+  CHECK (0 == memcmp (&pid0,
+                      &s_elem->peer_id,
+                      sizeof (struct GNUNET_PeerIdentity)));
+  CHECK (0 != memcmp (&hash_code,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  hash_code = s_elem->peer_id_hash;
+
+  /* We can only check that the peer id is one of both inputs */
+  RPS_sampler_elem_next (s_elem, &pid1);
+  CHECK ( (0 == memcmp (&pid0,
+                        &s_elem->peer_id,
+                        sizeof (struct GNUNET_PeerIdentity))) ||
+          (0 == memcmp (&pid1,
+                        &s_elem->peer_id,
+                        sizeof (struct GNUNET_PeerIdentity))) );
+
+  /* Check that hash stayed the same when peer id did not change */
+  if (0 == memcmp (&pid0,
+                   &s_elem->peer_id,
+                   sizeof (struct GNUNET_PeerIdentity)))
+  {
+    CHECK (0 == memcmp (&hash_code,
+                        &s_elem->peer_id_hash,
+                        sizeof (struct GNUNET_HashCode)));
+  }
+  else /* Check that hash changed */
+  {
+    CHECK (0 != memcmp (&hash_code,
+                        &s_elem->peer_id_hash,
+                        sizeof (struct GNUNET_HashCode)));
+  }
+
+  /* Check multiple inputs of same id
+   * hash should not change anymore */
+  hash_code2 = s_elem->peer_id_hash;
+  RPS_sampler_elem_next (s_elem, &pid0);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid1);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid0);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid0);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid0);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid1);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid1);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+  RPS_sampler_elem_next (s_elem, &pid1);
+  CHECK (0 == memcmp (&hash_code2,
+                      &s_elem->peer_id_hash,
+                      sizeof (struct GNUNET_HashCode)));
+
+  /* Check whether pid stayed the same all the time */
+  if (0 == memcmp (&hash_code,
+                   &hash_code2,
+                   sizeof (struct GNUNET_HashCode)))
+  {
+    CHECK (0 == memcmp (&pid0,
+                        &s_elem->peer_id,
+                        sizeof (struct GNUNET_PeerIdentity)));
+  }
+  else
+  {
+    CHECK (0 == memcmp (&pid1,
+                        &s_elem->peer_id,
+                        sizeof (struct GNUNET_PeerIdentity)));
+  }
+  RPS_sampler_elem_destroy (s_elem);
+
+  /* Check _set() */
+  s_elem = RPS_sampler_elem_create ();
+  CHECK (NULL != s_elem);
+  CHECK (EMPTY == s_elem->is_empty);
+  CHECK (NULL != &s_elem->auth_key);
+  auth_key = s_elem->auth_key;
+  memset (&auth_key2, 0, sizeof (auth_key2));
+  RPS_sampler_elem_set (s_elem, auth_key2);
+  CHECK (0 == memcmp (auth_key2.key,
+                      s_elem->auth_key.key,
+                      GNUNET_CRYPTO_HASH_LENGTH));
+  RPS_sampler_elem_destroy (s_elem);
+
+
+  /* TODO: deterministic tests (use _set() to set auth_key) */
+  return 0;
+}
+
+
+int
+main (int argc, char *argv[])
+{
+  GNUNET_log_setup ("test_service_rps_peers", 
+                   "WARNING",
+                   NULL);
+  return check ();
+}
+
+/* end of test_service_rps_peers.c */