database_test: Add test case for row limit

This patch introduces database_test and adds a test case to ensure
the row limit is respected when querying multiple partition ranges.

Signed-off-by: Duarte Nunes <duarte@scylladb.com>
Message-Id: <20160623111723.17523-1-duarte@scylladb.com>

configure.py

@@ -219,6 +219,7 @@ scylla_tests = [
     'tests/idl_test',
     'tests/range_tombstone_list_test',
     'tests/anchorless_list_test',
+    'tests/database_test',
 ]
 
 apps = [

test.py

@@ -72,6 +72,7 @@ boost_tests = [
     'range_tombstone_list_test',
     'streamed_mutation_test',
     'anchorless_list_test',
+    'database_test',
 ]
 
 other_tests = [

tests/database_test.cc

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016 ScyllaDB
+ */
+
+/*
+ * This file is part of Scylla.
+ *
+ * Scylla is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Scylla 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 Scylla.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define BOOST_TEST_DYN_LINK
+
+#include <seastar/core/thread.hh>
+#include <seastar/tests/test-utils.hh>
+
+#include "tests/cql_test_env.hh"
+#include "tests/result_set_assertions.hh"
+
+#include "database.hh"
+#include "partition_slice_builder.hh"
+#include "frozen_mutation.hh"
+
+#include "disk-error-handler.hh"
+
+thread_local disk_error_signal_type commit_error;
+thread_local disk_error_signal_type general_disk_error;
+
+SEASTAR_TEST_CASE(test_querying_with_limits) {
+    return do_with_cql_env([](cql_test_env& e) {
+        return seastar::async([&] {
+            e.execute_cql("create table ks.cf (k text, v int, primary key (k));").get();
+            auto& db = e.local_db();
+            auto s = db.find_schema("ks", "cf");
+            std::vector<query::partition_range> pranges;
+            for (uint32_t i = 1; i <= 5; ++i) {
+                auto pkey = partition_key::from_single_value(*s, to_bytes(sprint("key%d", i)));
+                mutation m(pkey, s);
+                m.set_clustered_cell(clustering_key_prefix::make_empty(), "v", data_value(bytes("v1")), 1);
+                db.apply(s, freeze(m)).get();
+                pranges.emplace_back(query::partition_range::make_singular(dht::global_partitioner().decorate_key(*s, std::move(pkey))));
+            }
+
+            auto cmd = query::read_command(s->id(), s->version(), partition_slice_builder(*s).build(), 3);
+
+            {
+                auto result = db.query(s, cmd, query::result_request::only_result, pranges).get0();
+                assert_that(query::result_set::from_raw_result(s, cmd.slice, *result)).has_size(3);
+            }
+        });
+    });
+}