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pattern.test.cc
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// Copyright (c) 2022 Mikael Simonsson <https://mikaelsimonsson.com>.
// SPDX-License-Identifier: BSL-1.0
#include "snn-core/regex/pattern.hh"
#include "snn-core/unittest.hh"
#include "snn-core/fn/common.hh"
namespace snn::app
{
namespace
{
bool example()
{
snn_require(regex::pattern{"[a-z]+"}.match_first("123abc"));
snn_require(!regex::pattern{"[a-z]+"}.match_first("123"));
snn_require(regex::pattern{"[a-z]+"}.match_full("abc"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("aBc"));
snn_require(regex::pattern{"[a-z]+"}.match_all("abc", fn::blackhole{}) == 1);
snn_require(regex::pattern{"[a-z]+"}.match_all("a123b", fn::blackhole{}) == 2);
snn_require(regex::pattern{"[a-z]+"}.match_all("123", fn::blackhole{}) == 0);
snn_require(regex::pattern{"[0-9]+"}.replace("one11two22", "($&)") == "one(11)two(22)");
snn_require(regex::pattern{"[a-z]+"}.replace("one11two22", "$&$&") ==
"oneone11twotwo22");
snn_require(regex::pattern{"[A-Z]+"}.replace("one11two22", "$&$&") == "one11two22");
regex::pattern p{"([a-z]+)([0-9]+)"};
const auto matches = p.match_first("one11two22");
snn_require(matches);
snn_require(!matches.is_empty());
snn_require(matches.count() == 3);
snn_require(matches.at(0).value().view() == "one11");
snn_require(matches.at(1).value().view() == "one");
snn_require(matches.at(2).value().view() == "11");
return true;
}
bool test_match_all()
{
{
snn_require(regex::pattern{"[a-z]+"}.match_all("onetwo", fn::blackhole{}) == 1);
snn_require(regex::pattern{"[a-z]+"}.match_all("o", fn::blackhole{}) == 1);
snn_require(regex::pattern{"[a-zA-Z]+"}.match_all("OneTwo", fn::blackhole{}) == 1);
snn_require(regex::pattern{"[a-z]+"}.match_all("a_", fn::blackhole{}) == 1);
snn_require(regex::pattern{"[a-z]+"}.match_all("_b", fn::blackhole{}) == 1);
snn_require(regex::pattern{"[a-z]+"}.match_all("OneTwo", fn::blackhole{}) == 2);
snn_require(regex::pattern{"[a-z]+"}.match_all("a_b", fn::blackhole{}) == 2);
snn_require(regex::pattern{"[a-z]+"}.match_all("", fn::blackhole{}) == 0);
snn_require(regex::pattern{"[a-z]+"}.match_all("123", fn::blackhole{}) == 0);
snn_require(regex::pattern{"[a-z]+"}.match_all("T", fn::blackhole{}) == 0);
snn_require(regex::pattern{"[a-z]+"}.match_all("ä", fn::blackhole{}) == 0);
}
{
usize count = 0;
snn_require(regex::pattern{"([a-z]+)([0-9]+)"}.match_all(
"one1two22", [&count](const auto matches) {
snn_require(matches);
snn_require(matches.count() == 3);
const auto match0 = matches.at(0).value();
const auto match1 = matches.at(1).value();
const auto match2 = matches.at(2).value();
snn_require(!matches.at(3).has_value());
if (count == 0)
{
snn_require(match0.position() == 0);
snn_require(match0.count() == 4);
snn_require(match0.size() == 4);
snn_require(match0.view() == "one1");
snn_require(match1.position() == 0);
snn_require(match1.count() == 3);
snn_require(match1.size() == 3);
snn_require(match1.view() == "one");
snn_require(match2.position() == 3);
snn_require(match2.count() == 1);
snn_require(match2.size() == 1);
snn_require(match2.view() == "1");
}
else if (count == 1)
{
snn_require(match0.position() == 4);
snn_require(match0.count() == 5);
snn_require(match0.size() == 5);
snn_require(match0.view() == "two22");
snn_require(match1.position() == 4);
snn_require(match1.count() == 3);
snn_require(match1.size() == 3);
snn_require(match1.view() == "two");
snn_require(match2.position() == 7);
snn_require(match2.count() == 2);
snn_require(match2.size() == 2);
snn_require(match2.view() == "22");
}
++count;
}) == 2);
snn_require(count == 2);
}
return true;
}
bool test_match_first()
{
{
snn_require(regex::pattern{"[a-z]+"}.match_first("onetwo"));
snn_require(regex::pattern{"[a-z]+"}.match_first("o"));
snn_require(regex::pattern{"[a-zA-Z]+"}.match_first("OneTwo"));
snn_require(regex::pattern{"[a-z]+"}.match_first("OneTwo"));
snn_require(regex::pattern{"[a-z]+"}.match_first("a_b"));
snn_require(regex::pattern{"[a-z]+"}.match_first("a_"));
snn_require(regex::pattern{"[a-z]+"}.match_first("_b"));
snn_require(!regex::pattern{"[a-z]+"}.match_first(""));
snn_require(!regex::pattern{"[a-z]+"}.match_first("123"));
snn_require(!regex::pattern{"[a-z]+"}.match_first("T"));
snn_require(!regex::pattern{"[a-z]+"}.match_first("ä"));
}
{
const auto matches = regex::pattern{"([a-z]+)([0-9]+)"}.match_first("one11two22");
snn_require(matches);
snn_require(!matches.is_empty());
snn_require(matches.count() == 3);
usize count = 0;
for (const auto match : matches)
{
if (count == 0)
{
snn_require(match.position() == 0);
snn_require(match.count() == 5);
snn_require(match.size() == 5);
snn_require(match.view() == "one11");
}
else if (count == 1)
{
snn_require(match.position() == 0);
snn_require(match.count() == 3);
snn_require(match.size() == 3);
snn_require(match.view() == "one");
}
else if (count == 2)
{
snn_require(match.position() == 3);
snn_require(match.count() == 2);
snn_require(match.size() == 2);
snn_require(match.view() == "11");
}
++count;
}
snn_require(count == 3);
snn_require(matches.at(0).has_value());
const auto match = matches.at(1).value();
snn_require(match.position() == 0);
snn_require(match.count() == 3);
snn_require(match.size() == 3);
snn_require(match.view() == "one");
snn_require(matches.at(2).has_value());
snn_require(!matches.at(3).has_value());
}
{
const auto matches = regex::pattern{"[a-z]+"}.match_first("1two");
snn_require(matches);
snn_require(!matches.is_empty());
snn_require(matches.count() == 1);
auto rng = matches.range();
snn_require(rng);
snn_require(!rng.is_empty());
auto match0 = rng.front().value();
snn_require(match0.position() == 1);
snn_require(match0.count() == 3);
snn_require(match0.size() == 3);
snn_require(match0.view() == "two");
rng.drop_front(promise::not_empty);
snn_require(!rng);
snn_require(rng.is_empty());
snn_require(!rng.front().has_value());
}
{
const auto matches = regex::pattern{"[0-9]+"}.match_first("onetwo");
snn_require(!matches);
snn_require(matches.is_empty());
snn_require(matches.count() == 0);
snn_require(matches.begin() == matches.end());
}
{
const regex::pattern p{strbuf{"[a-z]+"}, regex::icase};
const str s{"123ONETWO"};
snn_require(p.match_first(s));
}
{
const regex::pattern p{std::regex{"[a-z]+", std::regex::icase}};
const str s{"123ONETWO"};
snn_require(p.match_first(s));
}
return true;
}
bool test_match_full()
{
snn_require(regex::pattern{"[a-z]+"}.match_full("onetwo"));
snn_require(regex::pattern{"[a-z]+"}.match_full("o"));
snn_require(regex::pattern{"[a-zA-Z]+"}.match_full("OneTwo"));
snn_require(!regex::pattern{"[a-z]+"}.match_full(""));
snn_require(!regex::pattern{"[a-z]+"}.match_full("OneTwo"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("123"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("a_b"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("a_"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("_b"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("T"));
snn_require(!regex::pattern{"[a-z]+"}.match_full("ä"));
{
const auto matches = regex::pattern{"([a-z]{3})([a-z]{3})"}.match_full("onetwo");
snn_require(matches);
snn_require(!matches.is_empty());
snn_require(matches.count() == 3);
usize count = 0;
for (const auto match : matches)
{
if (count == 0)
{
snn_require(match.position() == 0);
snn_require(match.count() == 6);
snn_require(match.size() == 6);
snn_require(match.view() == "onetwo");
}
else if (count == 1)
{
snn_require(match.position() == 0);
snn_require(match.count() == 3);
snn_require(match.size() == 3);
snn_require(match.view() == "one");
}
else if (count == 2)
{
snn_require(match.position() == 3);
snn_require(match.count() == 3);
snn_require(match.size() == 3);
snn_require(match.view() == "two");
}
++count;
}
snn_require(count == 3);
snn_require(matches.at(0).has_value());
const auto match = matches.at(1).value();
snn_require(match.position() == 0);
snn_require(match.count() == 3);
snn_require(match.size() == 3);
snn_require(match.view() == "one");
snn_require(matches.at(2).has_value());
snn_require(!matches.at(3).has_value());
}
{
const auto matches = regex::pattern{"[0-9][a-z]+"}.match_full("1two");
snn_require(matches);
snn_require(!matches.is_empty());
snn_require(matches.count() == 1);
auto rng = matches.range();
snn_require(rng);
snn_require(!rng.is_empty());
auto match0 = rng.front().value();
snn_require(match0.position() == 0);
snn_require(match0.count() == 4);
snn_require(match0.size() == 4);
snn_require(match0.view() == "1two");
rng.drop_front(promise::not_empty);
snn_require(!rng);
snn_require(rng.is_empty());
snn_require(!rng.front().has_value());
}
{
const auto matches = regex::pattern{"[0-9]+"}.match_full("onetwo");
snn_require(!matches);
snn_require(matches.is_empty());
snn_require(matches.count() == 0);
snn_require(matches.begin() == matches.end());
}
{
const auto matches = regex::pattern{".*"}.match_full("");
snn_require(matches);
snn_require(matches.count() == 1);
const auto match = matches.at(0).value();
snn_require(match.position() == 0);
snn_require(match.count() == 0);
snn_require(match.size() == 0);
snn_require(match.view() == "");
}
{
const str s{"OneTwo"};
const regex::pattern p{"[a-z]+", regex::icase};
snn_require(p.match_full(s));
}
{
const cstrview s{"One\0"};
snn_require(s.size() == 4);
snn_require(regex::pattern{"([A-Z][a-z]+\\0)+"}.match_full(s));
snn_require(!regex::pattern{"([A-Z][a-z]+)+"}.match_full(s));
}
return true;
}
bool test_replace()
{
snn_require(regex::pattern{"[0-9]+"}.replace("one11two22", "($&)") == "one(11)two(22)");
snn_require(regex::pattern{"[a-z]+"}.replace("one11two22", "$&$&") ==
"oneone11twotwo22");
snn_require(regex::pattern{"[A-Z]+"}.replace("one11two22", "$&$&") == "one11two22");
snn_require(regex::pattern{"[a-z]+"}.replace("one11two22", "$$1$$&") == "$1$&11$1$&22");
snn_require(regex::pattern{"([a-z]+)\\0"}.replace("one\0two\0", "$1$&") ==
"oneone\0twotwo\0");
// Replacement format string can not contain null characters.
snn_require_throws_code(regex::pattern{"[a-z]+"}.replace("a", "a\0"),
generic::error::unexpected_null_character);
return true;
}
}
}
namespace snn
{
void unittest()
{
snn_require(app::example());
snn_require(app::test_match_all());
snn_require(app::test_match_first());
snn_require(app::test_match_full());
snn_require(app::test_replace());
}
}