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/* Copyright (c) 2017, 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 "my_config.h"
#include <optional>
#include "unittest/gunit/mock_parse_tree.h"
#include "unittest/gunit/test_utils.h"
#include "sql/parse_tree_items.h"
#include "sql/regexp/regexp_facade.h"
#include <gmock/gmock.h>
#include <gtest/gtest.h>
namespace regexp_facade_unittest {
using my_testing::fix;
using my_testing::make_fixed_literal;
using my_testing::Mock_text_literal;
using my_testing::Server_initializer;
using namespace regexp;
class RegexpFacadeTest : public ::testing::Test {
protected:
void SetUp() override { initializer.SetUp(); }
void TearDown() override { initializer.TearDown(); }
THD *thd() { return initializer.thd(); }
Server_initializer initializer;
};
class MockRegexpFacade : public Regexp_facade {
public:
MockRegexpFacade(THD *thd, const char *pattern)
: m_thd(thd),
m_pattern_expr(make_fixed_literal(thd, pattern)),
m_is_error(SetPattern(m_pattern_expr, 0)) {}
std::optional<int32_t> Find(const char *subject) {
Item *subject_expr = make_fixed_literal(m_thd, subject);
return Regexp_facade::Find(subject_expr, 1, 0, false);
}
std::int32_t FindValue(const char *subject) {
auto res = Find(subject);
// Should be ASSERT_TRUE(), but we can't use that here.
EXPECT_TRUE(res.has_value());
return res.value();
}
~MockRegexpFacade() { EXPECT_FALSE(m_is_error); }
private:
THD *m_thd;
Item *m_pattern_expr;
bool m_is_error;
};
TEST_F(RegexpFacadeTest, Find) {
auto abc = new Mock_text_literal("abc");
auto a = new PTI_text_literal_text_string(POS(), false,
{const_cast<char *>("a"), 2});
fix(thd(), {abc, a});
{
bool is_error = false;
MockRegexpFacade regex(thd(), "a");
ASSERT_FALSE(is_error);
EXPECT_EQ(1, regex.FindValue("abc"));
EXPECT_EQ(std::optional<int>(), regex.Find(nullptr));
}
// No error wanted.
{ MockRegexpFacade regex(thd(), nullptr); }
{
// It should work even if we don't pre-compile a pattern.
bool is_error = false;
MockRegexpFacade regex(thd(), "a");
ASSERT_FALSE(is_error);
{
SCOPED_TRACE("Failure value of: ");
EXPECT_EQ(std::optional<int>(1), regex.Find("abc"));
}
}
}
TEST_F(RegexpFacadeTest, Alignment) {
auto str = "aaa";
// Misaligning on purpose, should trigger an assertion or in the worst case
// a bus error on Sparc.
if (reinterpret_cast<uintptr_t>(str) % 2 == 0) ++str;
MockRegexpFacade regex(thd(), str);
}
TEST_F(RegexpFacadeTest, SetPattern) {
MockRegexpFacade regex(thd(), "a");
regex.SetPattern(nullptr, 0);
regex.SetPattern(nullptr, 0);
}
TEST_F(RegexpFacadeTest, Replace) {
StringBuffer<STRING_BUFFER_USUAL_SIZE> buf;
Item *subject1 = make_fixed_literal(thd(), " aaa");
Item *subject2 = make_fixed_literal(thd(), "");
Item *replacement = make_fixed_literal(thd(), "aamz");
const char *pattern = " +";
MockRegexpFacade regex(thd(), pattern);
regex.Replace(subject1, replacement, 1, 0, &buf);
// These arguments to Replace() will set U_STRING_NOT_TERMINATED_WARNING.
EXPECT_TRUE(regex.EngineHasWarning());
regex.Replace(subject2, replacement, 1, 0, &buf);
// The previous warning should have been cleared.
EXPECT_FALSE(regex.EngineHasWarning());
}
} // namespace regexp_facade_unittest
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