#include <mongoc/mongoc.h>
#include <mongoc/mongoc-collection-private.h>
#include <mongoc/mongoc-write-concern-private.h>
#include <mongoc/mongoc-read-concern-private.h>
#include <mongoc/mongoc-util-private.h>

#include "TestSuite.h"
#include "test-libmongoc.h"
#include "mongoc/mongoc-client-private.h"
#include "mongoc/mongoc-cursor-private.h"
#include "mongoc/mongoc-database-private.h"
#include "mock_server/future-functions.h"
#include "mock_server/mock-server.h"
#include "test-conveniences.h"


static void
test_aggregate_inherit_database (void)
{
   mock_server_t *server;
   mongoc_client_t *client;
   mongoc_cursor_t *cursor;
   mongoc_database_t *database;
   const bson_t *doc;
   request_t *request;
   future_t *future;
   bson_t *pipeline;
   bson_t opts = BSON_INITIALIZER;
   mongoc_read_concern_t *rc2;
   mongoc_read_concern_t *rc;
   mongoc_write_concern_t *wc2;
   mongoc_write_concern_t *wc;

   server = mock_server_with_auto_hello (WIRE_VERSION_OP_MSG);
   mock_server_run (server);
   client =
      test_framework_client_new_from_uri (mock_server_get_uri (server), NULL);
   database = mongoc_client_get_database (client, "admin");

   pipeline = BCON_NEW ("pipeline",
                        "[",
                        "{",
                        "$currentOp",
                        "{",
                        "}",
                        "}",
                        "{",
                        "$out",
                        BCON_UTF8 ("ops"),
                        "}",
                        "]");

   rc = mongoc_read_concern_new ();
   mongoc_read_concern_set_level (rc, MONGOC_READ_CONCERN_LEVEL_MAJORITY);
   mongoc_read_concern_append (rc, &opts);

   wc = mongoc_write_concern_new ();
   mongoc_write_concern_set_w (wc, 2);
   mongoc_write_concern_append (wc, &opts);

   /* Uses the opts */
   cursor = mongoc_database_aggregate (database, pipeline, &opts, NULL);
   future = future_cursor_next (cursor, &doc);

   request = mock_server_receives_msg (
      server,
      MONGOC_QUERY_NONE,
      tmp_bson ("{ 'aggregate' : 1,"
                "  'pipeline' : [ { '$currentOp': { } }, { '$out' : 'ops' } ],"
                "  'cursor' : { },"
                "  '$db' : 'admin',"
                "  '$readPreference' : { '$exists': false },"
                "  'readConcern' : { 'level' : 'majority' },"
                "  'writeConcern' : { 'w' : 2 } }"));

   mock_server_replies_simple (request, "{'ok': 1}");

   ASSERT (!future_get_bool (future));

   /* Set database level defaults */
   wc2 = mongoc_write_concern_new ();
   mongoc_write_concern_set_w (wc2, 3);
   mongoc_database_set_write_concern (database, wc2);
   rc2 = mongoc_read_concern_new ();
   mongoc_read_concern_set_level (rc2, MONGOC_READ_CONCERN_LEVEL_LOCAL);
   mongoc_database_set_read_concern (database, rc2);

   request_destroy (request);
   future_destroy (future);
   mongoc_cursor_destroy (cursor);

   /* Inherits from database */
   cursor = mongoc_database_aggregate (database, pipeline, NULL, NULL);
   future = future_cursor_next (cursor, &doc);

   request = mock_server_receives_msg (
      server,
      MONGOC_QUERY_NONE,
      tmp_bson ("{ 'aggregate' : 1,"
                "  'pipeline' : [ { '$currentOp': { } }, { '$out' : 'ops' } ],"
                "  'cursor' : { },"
                "  '$db' : 'admin',"
                "  '$readPreference' : { '$exists': false },"
                "  'readConcern' : { 'level' : 'local' },"
                "  'writeConcern' : { 'w' : 3 } }"));

   mock_server_replies_simple (request, "{'ok': 1}");

   ASSERT (!future_get_bool (future));

   request_destroy (request);
   future_destroy (future);
   mongoc_cursor_destroy (cursor);

   /* Uses the opts, not default database level */
   cursor = mongoc_database_aggregate (database, pipeline, &opts, NULL);
   future = future_cursor_next (cursor, &doc);

   request = mock_server_receives_msg (
      server,
      MONGOC_QUERY_NONE,
      tmp_bson ("{ 'aggregate' : 1,"
                "  'pipeline' : [ { '$currentOp': { } }, { '$out' : 'ops' } ],"
                "  'cursor' : { },"
                "  '$db' : 'admin',"
                "  '$readPreference' : { '$exists': false },"
                "  'readConcern' : { 'level' : 'majority' },"
                "  'writeConcern' : { 'w' : 2 } }"));

   mock_server_replies_simple (request, "{'ok': 1}");

   ASSERT (!future_get_bool (future));

   request_destroy (request);
   future_destroy (future);
   mongoc_cursor_destroy (cursor);

   /* Doesn't inherit write concern when not using $out  */
   bson_destroy (pipeline);
   pipeline = BCON_NEW ("pipeline", "[", "{", "$currentOp", "{", "}", "}", "]");

   cursor = mongoc_database_aggregate (database, pipeline, NULL, NULL);
   future = future_cursor_next (cursor, &doc);

   request = mock_server_receives_msg (
      server,
      MONGOC_QUERY_NONE,
      tmp_bson ("{ 'aggregate' : 1,"
                "  'pipeline' : [ { '$currentOp': { } } ],"
                "  'cursor' : { },"
                "  '$db' : 'admin',"
                "  '$readPreference' : { '$exists': false },"
                "  'readConcern' : { 'level' : 'local' },"
                "  'writeConcern' : { '$exists' : false } }"));

   mock_server_replies_simple (request, "{'ok': 1}");
   ASSERT (!future_get_bool (future));

   request_destroy (request);
   future_destroy (future);
   mongoc_cursor_destroy (cursor);

   bson_destroy (&opts);
   bson_destroy (pipeline);
   mongoc_read_concern_destroy (rc);
   mongoc_read_concern_destroy (rc2);
   mongoc_write_concern_destroy (wc);
   mongoc_write_concern_destroy (wc2);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
   mock_server_destroy (server);
}


static void
test_create_with_write_concern (void *ctx)
{
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   bson_error_t error = {0};
   mongoc_write_concern_t *bad_wc;
   mongoc_write_concern_t *good_wc;
   bson_t *opts = NULL;
   char *dbname;
   char *name;

   BSON_UNUSED (ctx);

   capture_logs (true);
   opts = bson_new ();

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);
   mongoc_client_set_error_api (client, 2);

   bad_wc = mongoc_write_concern_new ();
   good_wc = mongoc_write_concern_new ();

   dbname = gen_collection_name ("dbtest");
   database = mongoc_client_get_database (client, dbname);
   BSON_ASSERT (database);

   name = gen_collection_name ("create_collection");

   /* writeConcern that will not pass mongoc_write_concern_is_valid */
   bad_wc->wtimeout = -10;
   bson_reinit (opts);
   mongoc_write_concern_append_bad (bad_wc, opts);
   collection =
      mongoc_database_create_collection (database, name, opts, &error);
   ASSERT_ERROR_CONTAINS (error,
                          MONGOC_ERROR_COMMAND,
                          MONGOC_ERROR_COMMAND_INVALID_ARG,
                          "Invalid writeConcern");
   ASSERT (!collection);
   bad_wc->wtimeout = 0;
   error.code = 0;
   error.domain = 0;

   /* valid writeConcern on all configs */
   mongoc_write_concern_set_w (good_wc, 1);
   bson_reinit (opts);
   mongoc_write_concern_append (good_wc, opts);
   collection =
      mongoc_database_create_collection (database, name, opts, &error);
   ASSERT_OR_PRINT (collection, error);
   ASSERT (!error.code);
   ASSERT (!error.domain);

   ASSERT_OR_PRINT (mongoc_collection_drop (collection, &error), error);
   mongoc_collection_destroy (collection);

   /* writeConcern that results in writeConcernError */
   bad_wc->wtimeout = 0;
   mongoc_write_concern_set_w (bad_wc, 99);
   if (!test_framework_is_mongos ()) { /* skip if sharded */
      bson_reinit (opts);
      mongoc_write_concern_append_bad (bad_wc, opts);
      collection =
         mongoc_database_create_collection (database, name, opts, &error);

      ASSERT (!collection);
      assert_wc_oob_error (&error);
   }

   mongoc_database_destroy (database);
   bson_free (name);
   bson_free (dbname);
   bson_destroy (opts);
   mongoc_write_concern_destroy (good_wc);
   mongoc_write_concern_destroy (bad_wc);
   mongoc_client_destroy (client);
}


static void
test_copy (void)
{
   mongoc_database_t *database;
   mongoc_database_t *copy;
   mongoc_client_t *client;

   client = test_framework_new_default_client ();
   ASSERT (client);

   database = mongoc_client_get_database (client, "test");
   ASSERT (database);

   copy = mongoc_database_copy (database);
   ASSERT (copy);
   ASSERT (copy->client == database->client);
   ASSERT (strcmp (copy->name, database->name) == 0);

   mongoc_database_destroy (copy);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
test_has_collection (void)
{
   mongoc_collection_t *collection;
   mongoc_database_t *database;
   mongoc_client_t *client;
   bson_error_t error;
   char *name;
   bool r;
   bson_oid_t oid;
   bson_t b;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   name = gen_collection_name ("has_collection");
   collection = mongoc_client_get_collection (client, "test", name);
   BSON_ASSERT (collection);

   database = mongoc_client_get_database (client, "test");
   BSON_ASSERT (database);

   bson_init (&b);
   bson_oid_init (&oid, NULL);
   bson_append_oid (&b, "_id", 3, &oid);
   bson_append_utf8 (&b, "hello", 5, "world", 5);
   ASSERT_OR_PRINT (
      mongoc_collection_insert_one (collection, &b, NULL, NULL, &error), error);
   bson_destroy (&b);

   r = mongoc_database_has_collection (database, name, &error);
   BSON_ASSERT (!error.domain);
   BSON_ASSERT (r);

   bson_free (name);
   mongoc_database_destroy (database);
   mongoc_collection_destroy (collection);
   mongoc_client_destroy (client);
}


static void
test_command (void)
{
   mongoc_database_t *database;
   mongoc_client_t *client;
   mongoc_cursor_t *cursor;
   bson_error_t error;
   const bson_t *doc;
   bool r;
   bson_t cmd = BSON_INITIALIZER;
   bson_t reply;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   database = mongoc_client_get_database (client, "admin");

   /*
    * Test a known working command, "ping".
    */
   bson_append_int32 (&cmd, "ping", 4, 1);

   cursor = mongoc_database_command (
      database, MONGOC_QUERY_NONE, 0, 1, 0, &cmd, NULL, NULL);
   BSON_ASSERT (cursor);

   r = mongoc_cursor_next (cursor, &doc);
   BSON_ASSERT (r);
   BSON_ASSERT (doc);

   r = mongoc_cursor_next (cursor, &doc);
   BSON_ASSERT (!r);
   BSON_ASSERT (!doc);

   mongoc_cursor_destroy (cursor);


   /*
    * Test a non-existing command to ensure we get the failure.
    */
   bson_reinit (&cmd);
   bson_append_int32 (&cmd, "a_non_existing_command", -1, 1);

   r = mongoc_database_command_simple (database, &cmd, NULL, &reply, &error);
   BSON_ASSERT (!r);
   BSON_ASSERT (error.domain == MONGOC_ERROR_QUERY);
   BSON_ASSERT (error.code == MONGOC_ERROR_QUERY_COMMAND_NOT_FOUND);
   BSON_ASSERT (strstr (error.message, "a_non_existing_command"));

   bson_destroy (&reply);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
   bson_destroy (&cmd);
}


static void
_test_db_command_read_prefs (bool simple, bool pooled)
{
   mock_server_t *server;
   mongoc_client_pool_t *pool = NULL;
   mongoc_client_t *client;
   mongoc_database_t *db;
   mongoc_read_prefs_t *secondary_pref;
   bson_t *cmd;
   future_t *future;
   bson_error_t error;
   request_t *request;
   mongoc_cursor_t *cursor;
   const bson_t *reply;

   /* mock mongos: easiest way to test that read preference is configured */
   server = mock_mongos_new (WIRE_VERSION_MIN);
   mock_server_run (server);
   mock_server_auto_endsessions (server);

   if (pooled) {
      pool = test_framework_client_pool_new_from_uri (
         mock_server_get_uri (server), NULL);
      client = mongoc_client_pool_pop (pool);
   } else {
      client = test_framework_client_new_from_uri (mock_server_get_uri (server),
                                                   NULL);
   }

   db = mongoc_client_get_database (client, "db");
   secondary_pref = mongoc_read_prefs_new (MONGOC_READ_SECONDARY);
   mongoc_database_set_read_prefs (db, secondary_pref);
   cmd = tmp_bson ("{'foo': 1}");

   if (simple) {
      /* simple, without read preference */
      future = future_database_command_simple (db, cmd, NULL, NULL, &error);

      request = mock_server_receives_msg (
         server, MONGOC_MSG_NONE, tmp_bson ("{'$db': 'db', 'foo': 1}"));

      mock_server_replies_simple (request, "{'ok': 1}");
      ASSERT_OR_PRINT (future_get_bool (future), error);
      future_destroy (future);
      request_destroy (request);

      /* with read preference */
      future =
         future_database_command_simple (db, cmd, secondary_pref, NULL, &error);

      request = mock_server_receives_msg (
         server,
         MONGOC_MSG_NONE,
         tmp_bson ("{'$db': 'db',"
                   " 'foo': 1,"
                   " '$readPreference': {'mode': 'secondary'}}"));
      mock_server_replies_simple (request, "{'ok': 1}");
      ASSERT_OR_PRINT (future_get_bool (future), error);
      future_destroy (future);
      request_destroy (request);
   } else {
      /* not simple, no read preference */
      cursor = mongoc_database_command (
         db, MONGOC_QUERY_NONE, 0, 0, 0, cmd, NULL, NULL);
      future = future_cursor_next (cursor, &reply);
      request = mock_server_receives_msg (
         server, MONGOC_MSG_NONE, tmp_bson ("{'$db': 'db', 'foo': 1}"));

      mock_server_replies_simple (request, "{'ok': 1}");
      ASSERT (future_get_bool (future));
      future_destroy (future);
      request_destroy (request);
      mongoc_cursor_destroy (cursor);

      /* with read preference */
      cursor = mongoc_database_command (
         db, MONGOC_QUERY_NONE, 0, 0, 0, cmd, NULL, secondary_pref);
      future = future_cursor_next (cursor, &reply);
      request = mock_server_receives_msg (
         server,
         MONGOC_MSG_NONE,
         tmp_bson ("{'$db': 'db',"
                   " 'foo': 1,"
                   " '$readPreference': {'mode': 'secondary'}}"));

      mock_server_replies_simple (request, "{'ok': 1}");
      ASSERT (future_get_bool (future));
      future_destroy (future);
      request_destroy (request);
      mongoc_cursor_destroy (cursor);
   }

   mongoc_database_destroy (db);
   mongoc_read_prefs_destroy (secondary_pref);

   if (pooled) {
      mongoc_client_pool_push (pool, client);
      mongoc_client_pool_destroy (pool);
   } else {
      mongoc_client_destroy (client);
   }

   mock_server_destroy (server);
}


static void
test_db_command_simple_read_prefs_single (void)
{
   _test_db_command_read_prefs (true, false);
}


static void
test_db_command_simple_read_prefs_pooled (void)
{
   _test_db_command_read_prefs (true, true);
}


static void
test_db_command_read_prefs_single (void)
{
   _test_db_command_read_prefs (false, false);
}


static void
test_db_command_read_prefs_pooled (void)
{
   _test_db_command_read_prefs (false, true);
}


static void
test_drop (void)
{
   mongoc_client_t *client;
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   bson_error_t error = {0};
   bson_t *opts = NULL;
   char *dbname;
   mongoc_write_concern_t *good_wc;
   mongoc_write_concern_t *bad_wc;
   bool r;

   opts = bson_new ();
   client = test_framework_new_default_client ();
   BSON_ASSERT (client);
   mongoc_client_set_error_api (client, 2);

   bad_wc = mongoc_write_concern_new ();
   good_wc = mongoc_write_concern_new ();

   dbname = gen_collection_name ("db_drop_test");
   database = mongoc_client_get_database (client, dbname);

   /* MongoDB 3.2+ must create at least one replicated database before
    * dropDatabase will check writeConcern, see SERVER-25601 */
   collection = mongoc_database_get_collection (database, "collection");
   r = mongoc_collection_insert_one (
      collection, tmp_bson ("{}"), NULL, NULL, &error);

   ASSERT_OR_PRINT (r, error);

   ASSERT_OR_PRINT (mongoc_database_drop (database, &error), error);
   BSON_ASSERT (!error.domain);
   BSON_ASSERT (!error.code);

   mongoc_database_destroy (database);

   /* invalid writeConcern */
   bad_wc->wtimeout = -10;
   database = mongoc_client_get_database (client, dbname);

   bson_reinit (opts);
   mongoc_write_concern_append_bad (bad_wc, opts);
   ASSERT (!mongoc_database_drop_with_opts (database, opts, &error));
   ASSERT_ERROR_CONTAINS (error,
                          MONGOC_ERROR_COMMAND,
                          MONGOC_ERROR_COMMAND_INVALID_ARG,
                          "Invalid writeConcern");
   bad_wc->wtimeout = 0;
   error.code = 0;
   error.domain = 0;

   /* valid writeConcern */
   mongoc_write_concern_set_w (good_wc, 1);

   bson_reinit (opts);
   mongoc_write_concern_append (good_wc, opts);
   ASSERT_OR_PRINT (mongoc_database_drop_with_opts (database, opts, &error),
                    error);
   BSON_ASSERT (!error.code);
   BSON_ASSERT (!error.domain);

   /* invalid writeConcern */
   mongoc_write_concern_set_w (bad_wc, 99);
   mongoc_database_destroy (database);

   if (!test_framework_is_mongos ()) { /* skip if sharded */
      database = mongoc_client_get_database (client, dbname);
      bson_reinit (opts);
      mongoc_write_concern_append_bad (bad_wc, opts);
      r = mongoc_database_drop_with_opts (database, opts, &error);
      ASSERT (!r);
      assert_wc_oob_error (&error);
      mongoc_database_destroy (database);
   }

   bson_free (dbname);
   bson_destroy (opts);
   mongoc_collection_destroy (collection);
   mongoc_client_destroy (client);
   mongoc_write_concern_destroy (good_wc);
   mongoc_write_concern_destroy (bad_wc);
}


static void
test_create_collection (void)
{
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   bson_error_t error = {0};
   bson_t options;
   bson_t storage_opts;
   bson_t wt_opts;

   char *dbname;
   char *name;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   dbname = gen_collection_name ("dbtest");
   database = mongoc_client_get_database (client, dbname);
   BSON_ASSERT (database);
   bson_free (dbname);

   bson_init (&options);
   BSON_APPEND_INT32 (&options, "size", 1234);
   BSON_APPEND_INT32 (&options, "max", 4567);
   BSON_APPEND_BOOL (&options, "capped", true);

   BSON_APPEND_DOCUMENT_BEGIN (&options, "storageEngine", &storage_opts);
   BSON_APPEND_DOCUMENT_BEGIN (&storage_opts, "wiredTiger", &wt_opts);
   BSON_APPEND_UTF8 (&wt_opts, "configString", "block_compressor=zlib");
   bson_append_document_end (&storage_opts, &wt_opts);
   bson_append_document_end (&options, &storage_opts);


   name = gen_collection_name ("create_collection");
   ASSERT_OR_PRINT (collection = mongoc_database_create_collection (
                       database, name, &options, &error),
                    error);

   bson_destroy (&options);
   bson_free (name);

   ASSERT_OR_PRINT (mongoc_collection_drop (collection, &error), error);

   ASSERT_OR_PRINT (mongoc_database_drop (database, &error), error);

   mongoc_collection_destroy (collection);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
test_get_collection_info (void)
{
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   mongoc_cursor_t *cursor;
   bson_error_t error = {0};
   bson_iter_t col_iter;
   bson_t capped_options = BSON_INITIALIZER;
   bson_t noopts_options = BSON_INITIALIZER;
   bson_t name_filter = BSON_INITIALIZER;
   const bson_t *doc;
   int num_infos = 0;

   const char *name;
   char *dbname;
   char *capped_name;
   char *noopts_name;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   dbname = gen_collection_name ("dbtest");
   database = mongoc_client_get_database (client, dbname);

   BSON_ASSERT (database);
   bson_free (dbname);

   capped_name = gen_collection_name ("capped");
   BSON_APPEND_BOOL (&capped_options, "capped", true);
   BSON_APPEND_INT32 (&capped_options, "size", 10000000);
   BSON_APPEND_INT32 (&capped_options, "max", 1024);

   noopts_name = gen_collection_name ("noopts");

   collection = mongoc_database_create_collection (
      database, capped_name, &capped_options, &error);
   ASSERT_OR_PRINT (collection, error);
   mongoc_collection_destroy (collection);

   collection = mongoc_database_create_collection (
      database, noopts_name, &noopts_options, &error);
   ASSERT_OR_PRINT (collection, error);
   mongoc_collection_destroy (collection);

   /* first we filter on collection name. */
   BSON_APPEND_UTF8 (&name_filter, "name", noopts_name);

   /* We only test with filters since get_collection_names will
    * test w/o filters for us. */

   /* Filter on an exact match of name */
   BEGIN_IGNORE_DEPRECATIONS
   cursor = mongoc_database_find_collections (database, &name_filter, &error);
   END_IGNORE_DEPRECATIONS
   BSON_ASSERT (cursor);
   BSON_ASSERT (!error.domain);
   BSON_ASSERT (!error.code);

   while (mongoc_cursor_next (cursor, &doc)) {
      if (bson_iter_init (&col_iter, doc) &&
          bson_iter_find (&col_iter, "name") &&
          BSON_ITER_HOLDS_UTF8 (&col_iter) &&
          (name = bson_iter_utf8 (&col_iter, NULL))) {
         ++num_infos;
         BSON_ASSERT (0 == strcmp (name, noopts_name));
      } else {
         BSON_ASSERT (false);
      }
   }

   BSON_ASSERT (1 == num_infos);

   mongoc_cursor_destroy (cursor);

   ASSERT_OR_PRINT (mongoc_database_drop (database, &error), error);
   BSON_ASSERT (!error.domain);
   BSON_ASSERT (!error.code);

   bson_free (capped_name);
   bson_free (noopts_name);

   bson_destroy (&capped_options);
   bson_destroy (&noopts_options);
   bson_destroy (&name_filter);

   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
test_get_collection_info_regex (void)
{
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   mongoc_cursor_t *cursor;
   bson_error_t error = {0};
   bson_iter_t col_iter;
   bson_t name_filter = BSON_INITIALIZER;
   const bson_t *doc;
   char *dbname;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   dbname = gen_collection_name ("test_get_collection_info_regex");
   database = mongoc_client_get_database (client, dbname);
   mongoc_database_drop_with_opts (database, NULL, NULL);

   collection =
      mongoc_database_create_collection (database, "abbbc", NULL, &error);
   ASSERT_OR_PRINT (collection, error);
   mongoc_collection_destroy (collection);

   collection =
      mongoc_database_create_collection (database, "foo", NULL, &error);
   ASSERT_OR_PRINT (collection, error);

   BSON_APPEND_REGEX (&name_filter, "name", "ab+c", NULL);

   BEGIN_IGNORE_DEPRECATIONS
   cursor = mongoc_database_find_collections (database, &name_filter, &error);
   END_IGNORE_DEPRECATIONS

   BSON_ASSERT (cursor);
   BSON_ASSERT (!error.domain);
   BSON_ASSERT (!error.code);

   BSON_ASSERT (mongoc_cursor_next (cursor, &doc));
   BSON_ASSERT (bson_iter_init_find (&col_iter, doc, "name"));
   BSON_ASSERT (0 == strcmp (bson_iter_utf8 (&col_iter, NULL), "abbbc"));

   /* only one match */
   BSON_ASSERT (!mongoc_cursor_next (cursor, &doc));
   ASSERT_OR_PRINT (!mongoc_cursor_error (cursor, &error), error);
   mongoc_cursor_destroy (cursor);

   bson_destroy (&name_filter);
   mongoc_collection_destroy (collection);
   bson_free (dbname);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
test_get_collection_info_with_opts_regex (void)
{
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   mongoc_cursor_t *cursor;
   bson_error_t error = {0};
   bson_iter_t col_iter;
   bson_t opts = BSON_INITIALIZER;
   bson_t name_filter;
   const bson_t *doc;
   char *dbname;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   dbname = gen_collection_name ("test_get_collection_info_regex");
   database = mongoc_client_get_database (client, dbname);
   mongoc_database_drop_with_opts (database, NULL, NULL);

   collection =
      mongoc_database_create_collection (database, "abbbc", NULL, &error);
   ASSERT_OR_PRINT (collection, error);
   mongoc_collection_destroy (collection);

   collection =
      mongoc_database_create_collection (database, "foo", NULL, &error);
   ASSERT_OR_PRINT (collection, error);

   BSON_APPEND_DOCUMENT_BEGIN (&opts, "filter", &name_filter);
   BSON_APPEND_REGEX (&name_filter, "name", "ab+c", NULL);
   bson_append_document_end (&opts, &name_filter);

   cursor = mongoc_database_find_collections_with_opts (database, &opts);
   BSON_ASSERT (cursor);

   BSON_ASSERT (!error.domain);
   BSON_ASSERT (!error.code);

   BSON_ASSERT (mongoc_cursor_next (cursor, &doc));
   BSON_ASSERT (bson_iter_init_find (&col_iter, doc, "name"));
   BSON_ASSERT (0 == strcmp (bson_iter_utf8 (&col_iter, NULL), "abbbc"));

   /* only one match */
   BSON_ASSERT (!mongoc_cursor_next (cursor, &doc));
   ASSERT_OR_PRINT (!mongoc_cursor_error (cursor, &error), error);

   mongoc_cursor_destroy (cursor);
   bson_destroy (&opts);
   mongoc_collection_destroy (collection);
   bson_free (dbname);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
_test_get_collection_info_getmore (void)
{
   mock_server_t *server;
   mongoc_client_t *client;
   mongoc_database_t *database;
   future_t *future;
   request_t *request;
   char **names;

   server = mock_server_with_auto_hello (WIRE_VERSION_MIN);
   mock_server_run (server);
   client =
      test_framework_client_new_from_uri (mock_server_get_uri (server), NULL);
   database = mongoc_client_get_database (client, "db");
   future =
      future_database_get_collection_names_with_opts (database, NULL, NULL);

   request = mock_server_receives_msg (
      server,
      MONGOC_MSG_NONE,
      tmp_bson ("{'$db': 'db', 'listCollections': 1, 'nameOnly': true}"));

   mock_server_replies_simple (request,
                               "{'ok': 1,"
                               " 'cursor': {"
                               "   'id': {'$numberLong': '123'},"
                               "   'ns': 'db.$cmd.listCollections',"
                               "   'firstBatch': [{'name': 'a'}]}}");
   request_destroy (request);
   request = mock_server_receives_msg (
      server,
      MONGOC_MSG_NONE,
      tmp_bson ("{'$db': 'db',"
                " 'getMore': {'$numberLong': '123'},"
                " 'collection': '$cmd.listCollections'}"));

   mock_server_replies_simple (request,
                               "{'ok': 1,"
                               " 'cursor': {"
                               "    'id': {'$numberLong': '0'},"
                               "    'ns': 'db.$cmd.listCollections',"
                               "    'nextBatch': []}}");
   request_destroy (request);
   names = future_get_char_ptr_ptr (future);
   BSON_ASSERT (names);
   ASSERT_CMPSTR (names[0], "a");

   bson_strfreev (names);
   future_destroy (future);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
   mock_server_destroy (server);
}

static void
test_get_collection_info_getmore_cmd (void)
{
   _test_get_collection_info_getmore ();
}

static void
test_get_collection (void)
{
   mongoc_client_t *client;
   mongoc_database_t *database;
   mongoc_write_concern_t *wc;
   mongoc_read_concern_t *rc;
   mongoc_read_prefs_t *read_prefs;
   mongoc_collection_t *collection;

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   database = mongoc_client_get_database (client, "test");

   wc = mongoc_write_concern_new ();
   mongoc_write_concern_set_w (wc, 2);
   mongoc_database_set_write_concern (database, wc);

   rc = mongoc_read_concern_new ();
   mongoc_read_concern_set_level (rc, "majority");
   mongoc_database_set_read_concern (database, rc);

   read_prefs = mongoc_read_prefs_new (MONGOC_READ_SECONDARY);
   mongoc_database_set_read_prefs (database, read_prefs);

   collection = mongoc_database_get_collection (database, "test");

   ASSERT_CMPINT32 (collection->write_concern->w, ==, 2);
   ASSERT_CMPSTR (collection->read_concern->level, "majority");
   ASSERT_CMPINT (collection->read_prefs->mode, ==, MONGOC_READ_SECONDARY);

   mongoc_collection_destroy (collection);
   mongoc_read_prefs_destroy (read_prefs);
   mongoc_read_concern_destroy (rc);
   mongoc_write_concern_destroy (wc);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
test_get_collection_names (void)
{
   mongoc_database_t *database;
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   bson_error_t error = {0};
   bson_t options;
   int namecount;
   int explicit_nameonly;

   char **names;
   char **name;
   char *curname;

   char *dbname;
   char *name1;
   char *name2;
   char *name3;
   char *name4;
   char *name5;
   const char *system_prefix = "system.";

   client = test_framework_new_default_client ();
   BSON_ASSERT (client);

   dbname = gen_collection_name ("dbtest");
   database = mongoc_client_get_database (client, dbname);

   BSON_ASSERT (database);
   bson_free (dbname);

   bson_init (&options);

   name1 = gen_collection_name ("name1");
   name2 = gen_collection_name ("name2");
   name3 = gen_collection_name ("name3");
   name4 = gen_collection_name ("name4");
   name5 = gen_collection_name ("name5");

   collection =
      mongoc_database_create_collection (database, name1, &options, &error);
   BSON_ASSERT (collection);
   mongoc_collection_destroy (collection);

   collection =
      mongoc_database_create_collection (database, name2, &options, &error);
   BSON_ASSERT (collection);
   mongoc_collection_destroy (collection);

   collection =
      mongoc_database_create_collection (database, name3, &options, &error);
   BSON_ASSERT (collection);
   mongoc_collection_destroy (collection);

   collection =
      mongoc_database_create_collection (database, name4, &options, &error);
   BSON_ASSERT (collection);
   mongoc_collection_destroy (collection);

   collection =
      mongoc_database_create_collection (database, name5, &options, &error);
   BSON_ASSERT (collection);
   mongoc_collection_destroy (collection);

   for (explicit_nameonly = 0; explicit_nameonly <= 1; explicit_nameonly++) {
      namecount = 0;

      /* ensure that if users happen to pass nameOnly in opts we don't
       * append it again and cause a "duplicate field" server error */
      if (explicit_nameonly) {
         names = mongoc_database_get_collection_names_with_opts (
            database, tmp_bson ("{'nameOnly': true}"), &error);
      } else {
         names = mongoc_database_get_collection_names_with_opts (
            database, NULL, &error);
      }
      BSON_ASSERT (!error.domain);
      BSON_ASSERT (!error.code);

      for (name = names; *name; ++name) {
         /* inefficient, but OK for a unit test. */
         curname = *name;

         if (0 == strcmp (curname, name1) || 0 == strcmp (curname, name2) ||
             0 == strcmp (curname, name3) || 0 == strcmp (curname, name4) ||
             0 == strcmp (curname, name5)) {
            ++namecount;
         } else if (0 ==
                    strncmp (curname, system_prefix, strlen (system_prefix))) {
            /* Collections prefixed with 'system.' are system collections */
         } else {
            BSON_ASSERT (false);
         }

         bson_free (curname);
      }

      BSON_ASSERT (namecount == 5);
      bson_free (names);
   }

   bson_free (name1);
   bson_free (name2);
   bson_free (name3);
   bson_free (name4);
   bson_free (name5);

   ASSERT_OR_PRINT (mongoc_database_drop (database, &error), error);
   BSON_ASSERT (!error.domain);
   BSON_ASSERT (!error.code);

   bson_destroy (&options);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
}

static void
test_get_collection_names_error (void)
{
   mongoc_database_t *database;
   mongoc_uri_t *uri;
   mongoc_client_t *client;
   mock_server_t *server;
   bson_error_t error = {0};
   bson_t b = BSON_INITIALIZER;
   future_t *future;
   request_t *request;
   char **names;

   capture_logs (true);

   server = mock_server_new ();
   mock_server_auto_hello (server,
                           "{'isWritablePrimary': true,"
                           " 'minWireVersion': %d,"
                           " 'maxWireVersion': %d}",
                           WIRE_VERSION_MIN,
                           WIRE_VERSION_MAX);
   mock_server_run (server);
   uri = mongoc_uri_copy (mock_server_get_uri (server));
   mongoc_uri_set_option_as_bool (uri, MONGOC_URI_RETRYREADS, false);
   client = test_framework_client_new_from_uri (uri, NULL);

   database = mongoc_client_get_database (client, "test");
   future =
      future_database_get_collection_names_with_opts (database, NULL, &error);
   request = mock_server_receives_msg (
      server,
      MONGOC_MSG_NONE,
      tmp_bson ("{'$db': 'test', 'listCollections': 1, 'nameOnly': true}"));
   mock_server_hangs_up (request);
   names = future_get_char_ptr_ptr (future);
   BSON_ASSERT (!names);
   ASSERT_CMPINT (MONGOC_ERROR_STREAM, ==, error.domain);
   ASSERT_CMPINT (MONGOC_ERROR_STREAM_SOCKET, ==, error.code);

   request_destroy (request);
   future_destroy (future);
   mongoc_database_destroy (database);
   mongoc_client_destroy (client);
   mongoc_uri_destroy (uri);
   mock_server_destroy (server);
   bson_destroy (&b);
}

static void
test_get_default_database (void)
{
   /* default database is "db_name" */
   mongoc_client_t *client =
      test_framework_client_new ("mongodb://host/db_name", NULL);
   mongoc_database_t *db = mongoc_client_get_default_database (client);

   BSON_ASSERT (!strcmp ("db_name", mongoc_database_get_name (db)));

   mongoc_database_destroy (db);
   mongoc_client_destroy (client);

   /* no default database */
   client = test_framework_client_new ("mongodb://host/", NULL);
   db = mongoc_client_get_default_database (client);

   BSON_ASSERT (!db);

   mongoc_client_destroy (client);
}

void
test_database_install (TestSuite *suite)
{
   TestSuite_AddMockServerTest (suite,
                                "/Database/aggregate/inherit/database",
                                test_aggregate_inherit_database);
   TestSuite_AddFull (suite,
                      "/Database/create_with_write_concern",
                      test_create_with_write_concern,
                      NULL,
                      NULL,
                      TestSuite_CheckLive);
   TestSuite_AddLive (suite, "/Database/copy", test_copy);
   TestSuite_AddLive (suite, "/Database/has_collection", test_has_collection);
   TestSuite_AddLive (suite, "/Database/command", test_command);
   TestSuite_AddMockServerTest (suite,
                                "/Database/command/read_prefs/simple/single",
                                test_db_command_simple_read_prefs_single);
   TestSuite_AddMockServerTest (suite,
                                "/Database/command/read_prefs/simple/pooled",
                                test_db_command_simple_read_prefs_pooled);
   TestSuite_AddMockServerTest (suite,
                                "/Database/command/read_prefs/single",
                                test_db_command_read_prefs_single);
   TestSuite_AddMockServerTest (suite,
                                "/Database/command/read_prefs/pooled",
                                test_db_command_read_prefs_pooled);
   TestSuite_AddLive (suite, "/Database/drop", test_drop);
   TestSuite_AddLive (
      suite, "/Database/create_collection", test_create_collection);
   TestSuite_AddLive (
      suite, "/Database/get_collection_info", test_get_collection_info);
   TestSuite_AddLive (suite,
                      "/Database/get_collection_info_regex",
                      test_get_collection_info_regex);
   TestSuite_AddLive (suite,
                      "/Database/get_collection_info_with_opts_regex",
                      test_get_collection_info_with_opts_regex);
   TestSuite_AddMockServerTest (suite,
                                "/Database/get_collection/getmore_cmd",
                                test_get_collection_info_getmore_cmd);
   TestSuite_AddLive (suite, "/Database/get_collection", test_get_collection);
   TestSuite_AddLive (
      suite, "/Database/get_collection_names", test_get_collection_names);
   TestSuite_AddMockServerTest (suite,
                                "/Database/get_collection_names_error",
                                test_get_collection_names_error);
   TestSuite_Add (
      suite, "/Database/get_default_database", test_get_default_database);
}
