Add unit test for the calculation of "name" groups with expanded items

This prevents a possible regression that would have happened with the
first version of https://git.reviewboard.kde.org/r/112725/

The problem was that isChildItem(int index) would return "false"
incorrectly when the QHash for that item was not initialized yet. The
grouping code would then try to read the "text" from the empty QHash,
which yielded an empty QString, and then accessing the first character
of that string caused a crash.

1 files changed, 41 insertions, 1 deletions

diff --git a/src/tests/kfileitemmodeltest.cpp b/src/tests/kfileitemmodeltest.cpp
index d2a3ebda8..5dd3417fc 100644
--- a/src/tests/kfileitemmodeltest.cpp
+++ b/src/tests/kfileitemmodeltest.cpp
@@ -87,6 +87,7 @@ private slots:
     void removeParentOfHiddenItems();
     void testGeneralParentChildRelationships();
     void testNameRoleGroups();
+    void testNameRoleGroupsWithExpandedItems();
 
 private:
     QStringList itemsInModel() const;
@@ -1324,11 +1325,50 @@ void KFileItemModelTest::testNameRoleGroups()
     QCOMPARE(m_model->groups(), expectedGroups);
 }
 
+void KFileItemModelTest::testNameRoleGroupsWithExpandedItems()
+{
+    QSet<QByteArray> modelRoles = m_model->roles();
+    modelRoles << "isExpanded" << "isExpandable" << "expandedParentsCount";
+    m_model->setRoles(modelRoles);
+
+    QStringList files;
+    files << "a/b.txt" << "a/c.txt" << "d/e.txt" << "d/f.txt";
+
+    m_testDir->createFiles(files);
+
+    m_model->setGroupedSorting(true);
+    m_model->loadDirectory(m_testDir->url());
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+    QCOMPARE(itemsInModel(), QStringList() << "a" << "d");
+
+    QList<QPair<int, QVariant> > expectedGroups;
+    expectedGroups << QPair<int, QVariant>(0, QLatin1String("A"));
+    expectedGroups << QPair<int, QVariant>(1, QLatin1String("D"));
+    QCOMPARE(m_model->groups(), expectedGroups);
+
+    // Verify that expanding "a" and "d" will not change the groups (except for the index of "D").
+    expectedGroups.clear();
+    expectedGroups << QPair<int, QVariant>(0, QLatin1String("A"));
+    expectedGroups << QPair<int, QVariant>(3, QLatin1String("D"));
+
+    m_model->setExpanded(0, true);
+    QVERIFY(m_model->isExpanded(0));
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+    QCOMPARE(itemsInModel(), QStringList() << "a" << "b.txt" << "c.txt" << "d");
+    QCOMPARE(m_model->groups(), expectedGroups);
+
+    m_model->setExpanded(3, true);
+    QVERIFY(m_model->isExpanded(3));
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+    QCOMPARE(itemsInModel(), QStringList() << "a" << "b.txt" << "c.txt" << "d" << "e.txt" << "f.txt");
+    QCOMPARE(m_model->groups(), expectedGroups);
+}
+
 QStringList KFileItemModelTest::itemsInModel() const
 {
     QStringList items;
     for (int i = 0; i < m_model->count(); i++) {
-        items << m_model->data(i).value("text").toString();
+        items << m_model->fileItem(i).text();
     }
     return items;
 }