feat(StatusQ/Testing): invert method added TestModel emiting valid layoutChanged

ui/StatusQ/tests/src/TestHelpers/testmodel.cpp

@@ -1,5 +1,6 @@
 #include "testmodel.h"
 
+#include <algorithm>
 
 TestModel::TestModel(QList<QPair<QString, QVariantList>> data)
     : m_data(std::move(data))
@@ -82,6 +83,22 @@ void TestModel::remove(int index)
     endRemoveRows();
 }
 
+void TestModel::invert()
+{
+    emit layoutAboutToBeChanged();
+
+    for (auto& entry : m_data)
+        std::reverse(entry.second.begin(), entry.second.end());
+
+    const auto persistentIndexes = persistentIndexList();
+    const auto count = rowCount();
+
+    for (const QModelIndex& index: persistentIndexes)
+        changePersistentIndex(index, createIndex(count - index.row() - 1, 0));
+
+    emit layoutChanged();
+}
+
 void TestModel::initRoles()
 {
     m_roles.reserve(m_data.size());

ui/StatusQ/tests/src/TestHelpers/testmodel.h

@@ -8,7 +8,7 @@ public:
     explicit TestModel(QList<QPair<QString, QVariantList>> data);
     explicit TestModel(QList<QString> roles);
 
-    int rowCount(const QModelIndex& parent) const override;
+    int rowCount(const QModelIndex& parent = {}) const override;
     QHash<int, QByteArray> roleNames() const override;
     QVariant data(const QModelIndex& index, int role) const override;
 
@@ -16,6 +16,9 @@ public:
     void update(int index, int role, QVariant value);
     void remove(int index);
 
+    // inverts order of items, emits layoutAboutToBeChanged / layoutChanged
+    void invert();
+
 private:
     void initRoles();