File indexing completed on 2024-04-14 14:27:03

 /*
  * SPDX-FileCopyrightText: 2020 Arjen Hiemstra <ahiemstra@heimr.nl>
  *
  * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
  */
 
 #include <QTest>
 
 #include "datasource/HistoryProxySource.h"
 #include "datasource/ModelSource.h"
 #include "datasource/SingleValueSource.h"
 
 #define qs QStringLiteral
 
 class TestModel : public QAbstractListModel
 {
     Q_OBJECT
     Q_PROPERTY(int minimum READ minimum NOTIFY minimumChanged)
     Q_PROPERTY(int maximum READ maximum NOTIFY maximumChanged)
 
 public:
     TestModel(QObject *parent = nullptr)
         : QAbstractListModel(parent)
     {
         m_items.fill(1, 10);
     }
 
     int rowCount(const QModelIndex &parent) const override
     {
         if (parent.isValid()) {
             return 0;
         } else {
             return 10;
         }
     }
 
     QVariant data(const QModelIndex &index, int role) const override
     {
         Q_UNUSED(role)
 
         if (!checkIndex(index, CheckIndexOption::IndexIsValid | CheckIndexOption::ParentIsInvalid)) {
             qDebug() << "index invalid";
             return QVariant{};
         }
 
         return m_items.at(index.row());
     }
 
     void set(int item, int value)
     {
         if (item < 0 || item >= 10) {
             return;
         }
 
         m_items[item] = value;
         Q_EMIT dataChanged(index(item, 0), index(item, 0));
         Q_EMIT minimumChanged();
         Q_EMIT maximumChanged();
     }
 
     int minimum()
     {
         return *std::min_element(m_items.cbegin(), m_items.cend());
     }
 
     int maximum()
     {
         return *std::max_element(m_items.cbegin(), m_items.cend());
     }
 
     Q_SIGNAL void minimumChanged();
     Q_SIGNAL void maximumChanged();
 
 private:
     QVector<int> m_items;
 };
 
 class HistoryProxySourceTest : public QObject
 {
     Q_OBJECT
 
 private Q_SLOTS:
     void testCreate()
     {
         // Basic creation should create an empty source.
         auto source = new HistoryProxySource{};
 
         QCOMPARE(source->itemCount(), 0);
         QCOMPARE(source->item(0), QVariant{});
         QCOMPARE(source->minimum(), QVariant{});
         QCOMPARE(source->maximum(), QVariant{});
         QCOMPARE(source->source(), nullptr);
     }
 
     void testWithValue()
     {
         auto valueSource = std::make_unique<SingleValueSource>();
 
         // Simple case first, using default values for maximum history and fill
         // mode. This should lead to 10 history items with the most recent value
         // being the first item.
         auto historySource = std::make_unique<HistoryProxySource>();
         historySource->setSource(valueSource.get());
         historySource->setMaximumHistory(10);
         historySource->setFillMode(HistoryProxySource::DoNotFill);
 
         for (int i = 0; i < 15; i++) {
             valueSource->setValue(i);
             QCOMPARE(historySource->itemCount(), std::min(i + 1, 10));
 
             for (int item = 0; item < historySource->itemCount(); ++item) {
                 QCOMPARE(historySource->item(item), i - item);
             }
         }
 
         // Minimum and maximum should be minimum and maximum of current history
         // items.
         QCOMPARE(historySource->minimum(), 5);
         QCOMPARE(historySource->maximum(), 14);
 
         // Clearing will reset the history.
         QCOMPARE(historySource->itemCount(), 10);
         historySource->clear();
         QCOMPARE(historySource->itemCount(), 0);
 
         valueSource->setValue(5);
 
         // With an interval, we should be getting maximumHistory items of the
         // same value if we simply wait for at least interval * 10 milliseconds.
         historySource->setInterval(50);
 
         QTest::qWait(750);
 
         QCOMPARE(historySource->itemCount(), 10);
         for (int i = 0; i < historySource->itemCount(); ++i) {
             QCOMPARE(historySource->item(i), 5);
         }
 
         historySource->setInterval(0);
 
         // Increasing history size does not delete existing history.
         historySource->setMaximumHistory(20);
 
         QCOMPARE(historySource->itemCount(), 10);
 
         // Changing fill mode resets history and should now report
         // maximumHistory number of items. Empty items should use the same
         // QVariant type as the value source does.
 
         historySource->setFillMode(HistoryProxySource::FillFromStart);
 
         QCOMPARE(historySource->item(0), QVariant{QVariant::Int});
         QCOMPARE(historySource->itemCount(), 20);
         QCOMPARE(historySource->item(19), QVariant{QVariant::Int});
 
         // Using the FillFromEnd fill mode adds items to the end while itemCount
         // is less than maximumHistory.
 
         historySource->setFillMode(HistoryProxySource::FillFromEnd);
         QCOMPARE(historySource->itemCount(), 20);
 
         for (int i = 0; i < 19; ++i) {
             valueSource->setValue(i);
             QCOMPARE(historySource->item(0), QVariant{QVariant::Int});
             for (int item = 19; item > 1; --item) {
                 if ((item - 19) + i < 0) {
                     QCOMPARE(historySource->item(item), QVariant{QVariant::Int});
                 } else {
                     QCOMPARE(historySource->item(item), 19 - item);
                 }
             }
         }
     }
 
     void testWithModel()
     {
         auto model = std::make_unique<TestModel>();
         auto modelSource = std::make_unique<ModelSource>();
         modelSource->setModel(model.get());
         modelSource->setRole(Qt::DisplayRole);
 
         auto historySource = std::make_unique<HistoryProxySource>();
         historySource->setSource(modelSource.get());
         historySource->setMaximumHistory(10);
         historySource->setFillMode(HistoryProxySource::DoNotFill);
 
         // When there is a source with an itemCount > 1, we can use setItem to
         // indicate which item should be watched.
         historySource->setItem(2);
 
         // When we then change the model, the history source should record an
         // item.
         for (int i = 0; i < 10; ++i) {
             model->set(2, i);
             QCOMPARE(historySource->itemCount(), i + 1);
             for (int item = 0; item < historySource->itemCount(); ++item) {
                 QCOMPARE(historySource->item(item), i - item);
             }
         }
 
         historySource->clear();
 
         model->set(2, 5);
         model->set(2, 2);
 
         // When the model has a minimum and a maximum property, those will be
         // used for the history source's minimum and maximum rather than
         // calculating it based on the items in the history.
 
         QCOMPARE(historySource->minimum(), 1);
         QCOMPARE(historySource->maximum(), 2);
     }
 };
 
 QTEST_GUILESS_MAIN(HistoryProxySourceTest)
 
 #include "HistoryProxySourceTest.moc"