tdesktop/Telegram/SourceFiles/rpl/operators_tests.cpp

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop 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.
It 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.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "catch.hpp"
#include <rpl/rpl.h>
#include <string>
using namespace rpl;
class OnDestructor {
public:
OnDestructor(base::lambda_once<void()> callback)
: _callback(std::move(callback)) {
}
~OnDestructor() {
if (_callback) {
_callback();
}
}
private:
base::lambda_once<void()> _callback;
};
class InvokeCounter {
public:
InvokeCounter(
const std::shared_ptr<int> &copyCounter,
const std::shared_ptr<int> &moveCounter)
: _copyCounter(copyCounter)
, _moveCounter(moveCounter) {
}
InvokeCounter(const InvokeCounter &other)
: _copyCounter(other._copyCounter)
, _moveCounter(other._moveCounter) {
if (_copyCounter) {
++*_copyCounter;
}
}
InvokeCounter(InvokeCounter &&other)
: _copyCounter(base::take(other._copyCounter))
, _moveCounter(base::take(other._moveCounter)) {
if (_moveCounter) {
++*_moveCounter;
}
}
InvokeCounter &operator=(const InvokeCounter &other) {
_copyCounter = other._copyCounter;
_moveCounter = other._moveCounter;
if (_copyCounter) {
++*_copyCounter;
}
return *this;
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}
InvokeCounter &operator=(InvokeCounter &&other) {
_copyCounter = base::take(other._copyCounter);
_moveCounter = base::take(other._moveCounter);
if (_moveCounter) {
++*_moveCounter;
}
return *this;
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}
private:
std::shared_ptr<int> _copyCounter;
std::shared_ptr<int> _moveCounter;
};
TEST_CASE("basic operators tests", "[rpl::operators]") {
SECTION("single test") {
auto sum = std::make_shared<int>(0);
auto doneGenerated = std::make_shared<bool>(false);
auto destroyed = std::make_shared<bool>(false);
auto copyCount = std::make_shared<int>(0);
auto moveCount = std::make_shared<int>(0);
{
InvokeCounter counter(copyCount, moveCount);
auto destroyCalled = std::make_shared<OnDestructor>([=] {
*destroyed = true;
});
rpl::lifetime lifetime;
single(std::move(counter))
| start_with_next_error_done([=](InvokeCounter&&) {
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(void)destroyCalled;
++*sum;
}, [=](no_error) {
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(void)destroyCalled;
}, [=] {
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(void)destroyCalled;
*doneGenerated = true;
}, lifetime);
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}
REQUIRE(*sum == 1);
REQUIRE(*doneGenerated);
REQUIRE(*destroyed);
REQUIRE(*copyCount == 0);
}
SECTION("then test") {
auto sum = std::make_shared<int>(0);
auto doneGenerated = std::make_shared<bool>(false);
auto destroyed = std::make_shared<bool>(false);
auto copyCount = std::make_shared<int>(0);
auto moveCount = std::make_shared<int>(0);
{
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auto testing = complete<InvokeCounter>() | type_erased();
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for (auto i = 0; i != 5; ++i) {
InvokeCounter counter(copyCount, moveCount);
testing = std::move(testing)
| then(single(std::move(counter)));
}
auto destroyCalled = std::make_shared<OnDestructor>([=] {
*destroyed = true;
});
rpl::lifetime lifetime;
std::move(testing)
| then(complete<InvokeCounter>())
| start_with_next_error_done([=](InvokeCounter&&) {
(void)destroyCalled;
++*sum;
}, [=](no_error) {
(void)destroyCalled;
}, [=] {
(void)destroyCalled;
*doneGenerated = true;
}, lifetime);
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}
REQUIRE(*sum == 5);
REQUIRE(*doneGenerated);
REQUIRE(*destroyed);
REQUIRE(*copyCount == 0);
}
SECTION("map test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
single(1)
| then(single(2))
| then(single(3))
| then(single(4))
| then(single(5))
| map([](int value) {
return std::to_string(value);
})
| start_with_next([=](std::string &&value) {
*sum += std::move(value) + ' ';
}, lifetime);
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}
REQUIRE(*sum == "1 2 3 4 5 ");
}
SECTION("deferred test") {
auto launched = std::make_shared<int>(0);
auto checked = std::make_shared<int>(0);
{
rpl::lifetime lifetime;
auto make_next = [=] {
return deferred([=] {
return single(++*launched);
});
};
make_next()
| then(make_next())
| then(make_next())
| then(make_next())
| then(make_next())
| start_with_next([=](int value) {
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REQUIRE(++*checked == *launched);
REQUIRE(*checked == value);
}, lifetime);
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REQUIRE(*launched == 5);
}
}
SECTION("filter test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
single(1)
| then(single(1))
| then(single(2))
| then(single(2))
| then(single(3))
| filter([](int value) { return value != 2; })
| map([](int value) {
return std::to_string(value);
})
| start_with_next([=](std::string &&value) {
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*sum += std::move(value) + ' ';
}, lifetime);
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}
REQUIRE(*sum == "1 1 3 ");
}
SECTION("distinct_until_changed test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
single(1)
| then(single(1))
| then(single(2))
| then(single(2))
| then(single(3))
| distinct_until_changed()
| map([](int value) {
return std::to_string(value);
})
| start_with_next([=](std::string &&value) {
*sum += std::move(value) + ' ';
}, lifetime);
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}
REQUIRE(*sum == "1 2 3 ");
}
SECTION("flatten_latest test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
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{
rpl::event_stream<int> stream;
single(single(1) | then(single(2)))
| then(single(single(3) | then(single(4))))
| then(single(single(5) | then(stream.events())))
| flatten_latest()
| map([](int value) {
return std::to_string(value);
})
| start_with_next_done([=](std::string &&value) {
*sum += std::move(value) + ' ';
}, [=] {
*sum += "done ";
}, lifetime);
stream.fire(6);
}
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single(single(1))
| then(single(single(2) | then(single(3))))
| then(single(single(4) | then(single(5)) | then(single(6))))
| flatten_latest()
| map([](int value) {
return std::to_string(value);
})
| start_with_next([=](std::string &&value) {
*sum += std::move(value) + ' ';
}, lifetime);
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}
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REQUIRE(*sum == "1 2 3 4 5 6 done 1 2 3 4 5 6 ");
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}
SECTION("combine vector test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
rpl::event_stream<bool> a;
rpl::event_stream<bool> b;
rpl::event_stream<bool> c;
std::vector<rpl::producer<bool>> v;
v.push_back(a.events());
v.push_back(b.events());
v.push_back(c.events());
combine(std::move(v), [](const auto &values) {
return values[0] && values[1] && !values[2];
})
| start_with_next([=](bool value) {
*sum += std::to_string(value ? 1 : 0);
}, lifetime);
a.fire(true);
b.fire(true);
c.fire(false);
a.fire(false);
b.fire(true);
a.fire(true);
c.fire(true);
}
REQUIRE(*sum == "10010");
}
SECTION("combine test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
rpl::event_stream<int> a;
rpl::event_stream<short> b;
rpl::event_stream<char> c;
combine(
a.events(),
b.events(),
c.events(),
[](long a, long b, long c) {
return a;
})
| start_with_next([=](int value) {
*sum += std::to_string(value);
}, lifetime);
combine(
a.events(),
b.events(),
c.events(),
[](auto &&value) {
return std::get<1>(value);
})
| start_with_next([=](int value) {
*sum += std::to_string(value);
}, lifetime);
combine(a.events(), b.events(), c.events())
| map([](auto &&value) {
return std::make_tuple(
std::to_string(std::get<0>(value)),
std::to_string(std::get<1>(value)),
std::to_string(std::get<2>(value)));
})
| start_with_next([=](auto &&value) {
*sum += std::get<0>(value) + ' '
+ std::get<1>(value) + ' '
+ std::get<2>(value) + ' ';
}, lifetime);
a.fire(1);
b.fire(2);
c.fire(3);
a.fire(4);
b.fire(5);
c.fire(6);
}
REQUIRE(*sum == "121 2 3 424 2 3 454 5 3 454 5 6 ");
}
SECTION("mappers test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
rpl::event_stream<int> a;
rpl::event_stream<short> b;
rpl::event_stream<char> c;
using namespace mappers;
combine(
a.events(),
b.events(),
c.events(),
$1 + $2 + $3 + 10)
| start_with_next([=](int value) {
*sum += std::to_string(value);
}, lifetime);
a.fire(1);
b.fire(2);
c.fire(3);
a.fire(4);
b.fire(5);
c.fire(6);
}
REQUIRE(*sum == "16192225");
}
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SECTION("after_next test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
rpl::ints(3)
| after_next([=](int value) {
*sum += std::to_string(-value-1);
})
| start_with_next([=](int value) {
*sum += std::to_string(value);
}, lifetime);
}
REQUIRE(*sum == "0-11-22-3");
}
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SECTION("take test") {
auto sum = std::make_shared<std::string>("");
{
rpl::lifetime lifetime;
rpl::ints(10) | take(3)
| start_with_next_done([=](int value) {
*sum += std::to_string(value);
}, [=] {
*sum += "done";
}, lifetime);
}
REQUIRE(*sum == "012done");
}
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}