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PointerAlgorithm: Fix take and takeDefault

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Fix take unit tests to actually test the correct template instance,
add more unit tests for takeDefault.

Change-Id: I51f5b17b6478a8c1388a91840edfb9c702697b28
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
This commit is contained in:
Tobias Hunger
2018-03-15 13:00:05 +01:00
parent 805b28b8b7
commit 3ef6f35cf6
2 changed files with 35 additions and 21 deletions
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10
src/libs/utils/pointeralgorithm.h
View File

@@ -275,7 +275,7 @@ auto toRawPointer(const SourceContainer &sources)
// take:
/////////////////
template<typename C>
Q_REQUIRED_RESULT Utils::optional<ValueType<C>> take(C &container, ValueType<C> *p)
Q_REQUIRED_RESULT Utils::optional<ValueType<C>> take(C &container, PointerType<C> p)
{
return take(container, [p](const ValueType<C> &v) { return v.get() == p; });
}
@@ -283,23 +283,23 @@ Q_REQUIRED_RESULT Utils::optional<ValueType<C>> take(C &container, ValueType<C>
template <typename C>
Q_REQUIRED_RESULT Utils::optional<ValueType<C>> take(C &container, std::nullptr_t)
{
return take(container, static_cast<ValueType<C> *>(nullptr));
return take(container, static_cast<PointerType<C>>(nullptr));
}
//////////////////
// takeOrDefault:
/////////////////
template<typename C>
Q_REQUIRED_RESULT ValueType<C> takeOrDefault(C &container, ValueType<C> *p)
Q_REQUIRED_RESULT ValueType<C> takeOrDefault(C &container, PointerType<C> p)
{
auto result = take(container, [p](const ValueType<C> &v) { return v.get() == p; });
return bool(result) ? result.value() : Utils::make_optional<ValueType<C>>(nullptr);
return bool(result) ? std::move(result.value()) : std::move(ValueType<C>());
}
template <typename C>
Q_REQUIRED_RESULT ValueType<C> takeOrDefault(C &container, std::nullptr_t)
{
return takeOrDefault(container, static_cast<ValueType<C> *>(nullptr));
return takeOrDefault(container, static_cast<PointerType<C>>(nullptr));
}
} // namespace Utils

46
tests/auto/pointeralgorithm/tst_pointeralgorithm.cpp
View File

@@ -50,6 +50,7 @@ private slots:
void toRawPointer();
void toReferences();
void take();
void takeOrDefault();
};
@@ -283,25 +284,38 @@ void tst_PointerAlgorithm::toReferences()
void tst_PointerAlgorithm::take()
{
{
QList<Struct> v {1, 3, 5, 6, 7, 8, 9, 11, 13, 15, 13, 16, 17};
Utils::optional<Struct> r1 = Utils::take(v, [](const Struct &s) { return s.member == 13; });
QVERIFY(static_cast<bool>(r1));
QCOMPARE(r1.value().member, 13);
Utils::optional<Struct> r2 = Utils::take(v, [](const Struct &s) { return s.member == 13; });
QVERIFY(static_cast<bool>(r2));
QCOMPARE(r2.value().member, 13);
Utils::optional<Struct> r3 = Utils::take(v, [](const Struct &s) { return s.member == 13; });
QVERIFY(!static_cast<bool>(r3));
std::vector<std::unique_ptr<int>> vector;
vector.emplace_back(std::make_unique<int>(5));
vector.emplace_back(std::make_unique<int>(2));
vector.emplace_back(std::make_unique<int>(6));
vector.emplace_back(std::make_unique<int>(7));
vector.emplace_back(std::unique_ptr<int>());
std::vector<int *> ptrVector = Utils::toRawPointer(vector);
int foo = 42;
Utils::optional<Struct> r4 = Utils::take(v, &Struct::isEven);
QVERIFY(static_cast<bool>(r4));
QCOMPARE(r4.value().member, 6);
QVERIFY(Utils::take(vector, ptrVector.at(0)).value().get() == ptrVector.at(0));
QVERIFY(Utils::take(vector, ptrVector.at(0)) == Utils::nullopt);
QVERIFY(Utils::take(vector, &foo) == Utils::nullopt);
QVERIFY(Utils::take(vector, nullptr).value().get() == nullptr);
}
}
void tst_PointerAlgorithm::takeOrDefault()
{
QList<Struct> v {0, 0, 0, 0, 0, 0, 1, 2, 3};
Utils::optional<Struct> r1 = Utils::take(v, &Struct::member);
QVERIFY(static_cast<bool>(r1));
QCOMPARE(r1.value().member, 1);
{
std::vector<std::unique_ptr<int>> vector;
vector.emplace_back(std::make_unique<int>(5));
vector.emplace_back(std::make_unique<int>(2));
vector.emplace_back(std::make_unique<int>(6));
vector.emplace_back(std::make_unique<int>(7));
vector.emplace_back(std::unique_ptr<int>());
std::vector<int *> ptrVector = Utils::toRawPointer(vector);
int foo = 42;
QVERIFY(Utils::takeOrDefault(vector, ptrVector.at(0)).get() == ptrVector.at(0));
QVERIFY(Utils::takeOrDefault(vector, ptrVector.at(0)).get() == nullptr);
QVERIFY(Utils::takeOrDefault(vector, &foo).get() == nullptr);
QVERIFY(Utils::takeOrDefault(vector, nullptr).get() == nullptr);
}
}