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testregex.cpp
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195 lines (168 loc) · 5.38 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2025 Cppcheck team.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_RULES
#include "fixture.h"
#include "regex.h"
#include <list>
#include <memory>
#include <string>
#include <utility>
class TestRegEx : public TestFixture {
public:
TestRegEx() : TestFixture("TestRegEx") {}
private:
void run() override {
TEST_CASE(match);
TEST_CASE(nomatch);
TEST_CASE(compileError);
TEST_CASE(copy);
TEST_CASE(multimatch);
TEST_CASE(partialmatch);
TEST_CASE(exactmatch);
}
#define assertRegex(...) assertRegex_(__FILE__, __LINE__, __VA_ARGS__)
std::shared_ptr<Regex> assertRegex_(const char* file, int line, std::string pattern, const std::string& exp_err = "") const {
std::string regex_err;
auto r = Regex::create(std::move(pattern), regex_err);
if (exp_err.empty())
ASSERT_LOC(!!r.get(), file, line);
else
ASSERT_LOC(!r.get(), file, line); // only not set if we encountered an error
ASSERT_EQUALS_LOC(exp_err, regex_err, file, line);
return r;
}
void match() const {
const auto r = assertRegex("begin.*end");
int called = 0;
int s = -1;
int e = -1;
auto f = [&](int start, int end) {
++called;
s = start;
e = end;
};
ASSERT_EQUALS("", r->match("begin-123-end", std::move(f)));
ASSERT_EQUALS(1, called);
ASSERT_EQUALS(0, s);
ASSERT_EQUALS(13, e);
}
void nomatch() const {
const auto r = assertRegex("begin.*end");
int called = 0;
auto f = [&](int /*start*/, int /*end*/) {
++called;
};
ASSERT_EQUALS("", r->match("end-123-begin", std::move(f)));
ASSERT_EQUALS(0, called);
}
void compileError() const {
(void)assertRegex("[", "pcre_compile failed: missing terminating ] for character class");
}
void copy() const {
const auto r = assertRegex("begin.*end");
int called = 0;
int s = -1;
int e = -1;
auto f = [&](int start, int end) {
++called;
s = start;
e = end;
};
{
// NOLINTNEXTLINE(performance-unnecessary-copy-initialization)
auto r2 = r;
ASSERT_EQUALS("", r2->match("begin-123-end", f));
ASSERT_EQUALS(1, called);
ASSERT_EQUALS(0, s);
ASSERT_EQUALS(13, e);
}
called = 0;
s = -1;
e = -1;
ASSERT_EQUALS("", r->match("begin-123-end", f));
ASSERT_EQUALS(1, called);
ASSERT_EQUALS(0, s);
ASSERT_EQUALS(13, e);
}
void multimatch() const {
const auto r = assertRegex("info:.*");
std::string input =
"info: start\n"
"info: init\n"
"warn: missing\n"
"warn: invalid\n"
"info: done\n"
"error: notclean\n";
std::list<std::string> matches;
auto f = [&](int start, int end) {
matches.push_back(input.substr(start, end - start));
};
ASSERT_EQUALS("", r->match(input, std::move(f)));
ASSERT_EQUALS(3, matches.size());
auto it = matches.cbegin();
ASSERT_EQUALS("info: start", *it);
ASSERT_EQUALS("info: init", *(++it));
ASSERT_EQUALS("info: done", *(++it));
}
void partialmatch() const {
const auto r = assertRegex("123");
int called = 0;
int s = -1;
int e = -1;
auto f = [&](int start, int end) {
++called;
s = start;
e = end;
};
ASSERT_EQUALS("", r->match("begin-123-end", std::move(f)));
ASSERT_EQUALS(1, called);
ASSERT_EQUALS(6, s);
ASSERT_EQUALS(9, e);
}
void exactmatch() const {
const auto r = assertRegex("^123$");
int called = 0;
int s = -1;
int e = -1;
auto f = [&](int start, int end) {
++called;
s = start;
e = end;
};
ASSERT_EQUALS("", r->match("begin-123-end", f));
ASSERT_EQUALS(0, called);
ASSERT_EQUALS(-1, s);
ASSERT_EQUALS(-1, e);
ASSERT_EQUALS("", r->match("123\n123", f));
ASSERT_EQUALS(0, called);
ASSERT_EQUALS(-1, s);
ASSERT_EQUALS(-1, e);
ASSERT_EQUALS("", r->match("123123", f));
ASSERT_EQUALS(0, called);
ASSERT_EQUALS(-1, s);
ASSERT_EQUALS(-1, e);
ASSERT_EQUALS("", r->match("123", f));
ASSERT_EQUALS(1, called);
ASSERT_EQUALS(0, s);
ASSERT_EQUALS(3, e);
}
// TODO: how to provoke a match() error?
#undef assertRegex
};
REGISTER_TEST(TestRegEx)
#endif // HAVE_RULES