Re-organize the code that compares expanded items

The previous approach, which was based on comparing the URLs as
strings, was not only very complex, but also could lead to
inconsistencies in the model, namely, that not all children were
removed from the model when the dir lister reported the parent as
deleted. Later on, this could even lead to a crash.

BUG: 311947
FIXED-IN: 4.11
REVIEW: 108766

1 files changed, 52 insertions, 0 deletions

diff --git a/src/tests/kfileitemmodeltest.cpp b/src/tests/kfileitemmodeltest.cpp
index 85a46488f..c9f8a3468 100644
--- a/src/tests/kfileitemmodeltest.cpp
+++ b/src/tests/kfileitemmodeltest.cpp
@@ -21,6 +21,8 @@
 #include <qtest_kde.h>
 
 #include <KDirLister>
+#include <kio/job.h>
+
 #include "kitemviews/kfileitemmodel.h"
 #include "kitemviews/private/kfileitemmodeldirlister.h"
 #include "testdir.h"
@@ -71,6 +73,7 @@ private slots:
     void testItemRangeConsistencyWhenInsertingItems();
     void testExpandItems();
     void testExpandParentItems();
+    void testMakeExpandedItemHidden();
     void testSorting();
     void testIndexForKeyboardSearch();
     void testNameFilter();
@@ -569,6 +572,55 @@ void KFileItemModelTest::testExpandParentItems()
     QVERIFY(m_model->isConsistent());
 }
 
+/**
+ * Renaming an expanded folder by prepending its name with a dot makes it
+ * hidden. Verify that this does not cause an inconsistent model state and
+ * a crash later on, see https://bugs.kde.org/show_bug.cgi?id=311947
+ */
+void KFileItemModelTest::testMakeExpandedItemHidden()
+{
+    QSet<QByteArray> modelRoles = m_model->roles();
+    modelRoles << "isExpanded" << "isExpandable" << "expandedParentsCount";
+    m_model->setRoles(modelRoles);
+
+    QStringList files;
+    m_testDir->createFile("1a/2a/3a");
+    m_testDir->createFile("1a/2a/3b");
+    m_testDir->createFile("1a/2b");
+    m_testDir->createFile("1b");
+
+    m_model->loadDirectory(m_testDir->url());
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+
+    // So far, the model contains only "1a/" and "1b".
+    QCOMPARE(m_model->count(), 2);
+    m_model->setExpanded(0, true);
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+
+    // Now "1a/2a" and "1a/2b" have appeared.
+    QCOMPARE(m_model->count(), 4);
+    m_model->setExpanded(1, true);
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+    QCOMPARE(m_model->count(), 6);
+
+    // Rename "1a/2" and make it hidden.
+    const QString oldPath = m_model->fileItem(0).url().path() + "/2a";
+    const QString newPath = m_model->fileItem(0).url().path() + "/.2a";
+
+    KIO::SimpleJob* job = KIO::rename(oldPath, newPath, KIO::HideProgressInfo);
+    bool ok = job->exec();
+    QVERIFY(ok);
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsRemoved(KItemRangeList)), DefaultTimeout));
+
+    // "1a/2" and its subfolders have disappeared now.
+    QVERIFY(m_model->isConsistent());
+    QCOMPARE(m_model->count(), 3);
+
+    m_model->setExpanded(0, false);
+    QCOMPARE(m_model->count(), 2);
+
+}
+
 void KFileItemModelTest::testSorting()
 {
     // Create some files with different sizes and modification times to check the different sorting options