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/* Copyright (c) 2020, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
This program 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, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include <gtest/gtest.h>
#include <libmysql/dns_srv_data.h>
#include <unordered_set>
namespace dns_srv_data_unittest {
class dns_srv_data_test : public ::testing::Test {
protected:
void SetUp() override {}
void TearDown() override {
data.clear();
host.clear();
port = 0;
}
Dns_srv_data data;
std::string host;
unsigned port;
};
TEST_F(dns_srv_data_test, empty_list) {
host = "nothost";
port = 100;
ASSERT_EQ(data.pop_next(host, port), true);
ASSERT_STREQ(host.c_str(), "nothost");
ASSERT_EQ(port, 100);
}
TEST_F(dns_srv_data_test, one_element) {
data.add("h1", 12, 0, 0);
ASSERT_EQ(data.pop_next(host, port), false);
ASSERT_STREQ(host.c_str(), "h1");
ASSERT_EQ(port, 12);
host = "h2";
port = 13;
ASSERT_EQ(data.pop_next(host, port), true);
}
TEST_F(dns_srv_data_test, different_prio) {
const std::string low("low");
const std::string high("high");
// push low prio first, high prio next
data.add(low, 13, 2, 0);
data.add(high, 12, 1, 0);
// pop and expect high prio
ASSERT_EQ(data.pop_next(host, port), false);
ASSERT_STREQ(host.c_str(), high.c_str());
ASSERT_EQ(port, 12);
// pop and expect low prio
ASSERT_EQ(data.pop_next(host, port), false);
ASSERT_STREQ(host.c_str(), low.c_str());
ASSERT_EQ(port, 13);
// expect empty
ASSERT_EQ(data.pop_next(host, port), true);
}
TEST_F(dns_srv_data_test, different_weight) {
const std::string low("low");
const std::string high("high");
bool got_low = false, got_high = false;
// push low prio first, high weight next
data.add(low, 13, 1, 1);
data.add(high, 12, 1, 2);
while (!data.pop_next(host, port)) {
if (host == high && port == 12)
got_high = true;
else if (host == low && port == 13)
got_low = true;
else
ASSERT_TRUE(host == high || host == low);
}
ASSERT_TRUE(got_high && got_low);
}
TEST_F(dns_srv_data_test, zero_weight) {
const std::string zero("zero");
const std::string nonzero("nonzero");
std::unordered_set<unsigned> s = {12, 13, 14, 15};
data.add(zero, 13, 1, 0);
data.add(zero, 12, 1, 0);
data.add(nonzero, 14, 1, 1);
data.add(nonzero, 15, 1, 2);
while (!data.pop_next(host, port)) {
std::unordered_set<unsigned>::iterator i = s.find(port);
ASSERT_TRUE(i != s.end());
s.erase(i);
}
ASSERT_TRUE(s.empty());
}
TEST_F(dns_srv_data_test, mixed_weight) {
const std::string p1("p1");
const std::string p2("p2");
std::unordered_set<unsigned> s = {12, 13, 14, 15};
data.add(p1, 13, 1, 0);
data.add(p1, 12, 1, 1);
data.add(p2, 14, 2, 0);
data.add(p2, 15, 2, 1);
while (!data.pop_next(host, port)) {
std::unordered_set<unsigned>::iterator i = s.find(port);
ASSERT_TRUE(i != s.end());
if (s.size() > 2)
ASSERT_STREQ(host.c_str(), p1.c_str());
else
ASSERT_STREQ(host.c_str(), p2.c_str());
s.erase(i);
}
ASSERT_TRUE(s.empty());
}
} // namespace dns_srv_data_unittest
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