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// SPDX-FileCopyrightText: 2022 Daniel Vrátil <dvratil@kde.org>
//
// SPDX-License-Identifier: MIT
#include "qcorogenerator.h"
#include "qcorotest.h"
#include <QObject>
#include <QTest>
#include <QScopeGuard>
struct Nocopymove {
explicit constexpr Nocopymove(int val): val(val) {}
Nocopymove(const Nocopymove &) = delete;
Nocopymove &operator=(const Nocopymove &) = delete;
Nocopymove(Nocopymove &&) = delete;
Nocopymove &operator=(Nocopymove &&) = delete;
~Nocopymove() = default;
int val;
};
struct Moveonly {
explicit constexpr Moveonly(int val): val(val) {}
Moveonly(const Moveonly &) = delete;
Moveonly &operator=(const Moveonly &) = delete;
Moveonly(Moveonly &&) noexcept = default;
Moveonly &operator=(Moveonly &&) noexcept = default;
~Moveonly() = default;
int val;
};
class GeneratorTest : public QObject {
Q_OBJECT
private Q_SLOTS:
void testImmediateGenerator() {
const auto createGenerator = []() -> QCoro::Generator<int> {
for (int value = 0; value < 10; ++value) {
co_yield value;
}
};
auto generator = createGenerator();
std::vector<int> values;
for (auto it = generator.begin(), end = generator.end(); it != end; ++it) {
values.emplace_back(*it);
}
QCOMPARE(values.size(), 10U);
QCOMPARE(values, (std::vector<int>{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}));
}
void testTerminateSuspendedGenerator() {
bool destroyed = false;
const auto createGenerator = [&destroyed]() -> QCoro::Generator<int> {
const auto guard = qScopeGuard([&destroyed]() {
destroyed = true;
});
const auto pointer = std::make_unique<QString>(
QStringLiteral("This should get destroyed. If not, ASAN will catch it."));
while (true) {
co_yield 42;
}
};
{
auto generator = createGenerator();
const auto it = generator.begin();
QCOMPARE(*it, 42);
} // The generator gets destroyed here.
QVERIFY(destroyed);
}
void testEmptyGenerator() {
const auto createGenerator = []() -> QCoro::Generator<int> {
if (false) { // NOLINT(readability-simplify-boolean-expr)
co_yield 42; // Make it a coroutine, except it never gets invoked.
}
};
auto generator = createGenerator();
const auto begin = generator.begin();
QCOMPARE(begin, generator.end());
}
void testConstReferenceGenerator() {
const auto createGenerator = []() -> QCoro::Generator<const Nocopymove &> {
for (int i = 0; i < 4; ++i) {
const Nocopymove val(i);
co_yield val;
}
};
auto generator = createGenerator();
auto it = generator.begin();
int testval = 0;
while (it != generator.end()) {
const Nocopymove &value = *it;
QCOMPARE(value.val, testval++);
++it;
}
QCOMPARE(testval, 4);
}
void testReferenceGenerator() {
const auto createGenerator = []() -> QCoro::Generator<Nocopymove &> {
for (int i = 0; i < 8; i += 2) {
Nocopymove val(i);
co_yield val;
QCORO_COMPARE(val.val, i + 1);
}
};
auto generator = createGenerator();
auto it = generator.begin();
int testval = 0;
while (it != generator.end()) {
Nocopymove &value = *it;
QCOMPARE(value.val, testval);
value.val += 1;
testval += 2;
++it;
}
}
void testMoveonlyGenerator() {
const auto createGenerator = []() -> QCoro::Generator<Moveonly &&> {
for (int i = 0; i < 4; ++i) {
Moveonly value{i};
co_yield std::move(value);
}
};
auto generator = createGenerator();
auto it = generator.begin();
int testval = 0;
while (it != generator.end()) {
Moveonly val = std::move(*it);
QCOMPARE(val.val, testval++);
++it;
}
QCOMPARE(testval, 4);
}
void testMovedGenerator() {
const auto createGenerator = []() -> QCoro::Generator<int> {
for (int i = 0; i < 4; ++i) {
co_yield i;
}
};
auto originalGenerator = createGenerator();
auto generator = std::move(originalGenerator);
auto it = generator.begin();
int testval = 0;
while (it != generator.end()) {
int value = *it;
QCOMPARE(value, testval++);
++it;
}
QCOMPARE(testval, 4);
}
void testException() {
const auto createGenerator = []() -> QCoro::Generator<int> {
for (int i = 0; i < 10; ++i) {
if (i == 2) {
throw std::runtime_error("Two?! I can't handle two!!");
}
co_yield i;
}
};
auto generator = createGenerator();
auto it = generator.begin();
QVERIFY(it != generator.end());
QCOMPARE(*it, 0);
++it;
QVERIFY(it != generator.end());
QCOMPARE(*it, 1);
#if QT_VERSION >= QT_VERSION_CHECK(6, 3, 0)
QVERIFY_THROWS_EXCEPTION(std::runtime_error, ++it);
#else
QVERIFY_EXCEPTION_THROWN(++it, std::runtime_error);
#endif
QCOMPARE(it, generator.end());
}
void testExceptionInBegin() {
auto generator = []() -> QCoro::Generator<int> {
throw std::runtime_error("Zero is too small!");
co_yield 1;
}();
#if QT_VERSION >= QT_VERSION_CHECK(6, 3, 0)
QVERIFY_THROWS_EXCEPTION(std::runtime_error, generator.begin());
#else
QVERIFY_EXCEPTION_THROWN(generator.begin(), std::runtime_error);
#endif
}
};
QTEST_GUILESS_MAIN(GeneratorTest)
#include "qcorogenerator.moc"
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