QFileSystemModel/Windows: Make file name checking case-insensitive

Introduce a special hash modeled on the one used for QFileSystemWatcher
on Windows.

Task-number: QTBUG-31103
Task-number: QTBUG-64147
Change-Id: I69ebabe841716e4957ae3fb04fa5c43d233a3552
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 28 insertions, 1 deletions

diff --git a/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp b/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
index 979d5c632e..71efe1d59a 100644
--- a/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
+++ b/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
@@ -43,6 +43,7 @@
 #if defined(Q_OS_WIN)
 # include <qt_windows.h> // for SetFileAttributes
 #endif
+#include <private/qfilesystemengine_p.h>
 
 #include <algorithm>
 
@@ -883,6 +884,18 @@ void tst_QFileSystemModel::deleteFile()
     QVERIFY(!newFile.exists());
 }
 
+static QString flipCase(QString s)
+{
+    for (int i = 0, size = s.size(); i < size; ++i) {
+        const QChar c = s.at(i);
+        if (c.isUpper())
+            s[i] = c.toLower();
+        else if (c.isLower())
+            s[i] = c.toUpper();
+    }
+    return s;
+}
+
 void tst_QFileSystemModel::caseSensitivity()
 {
     QString tmp = flatDirTestPath;
@@ -890,9 +903,23 @@ void tst_QFileSystemModel::caseSensitivity()
     files << "a" << "c" << "C";
     QVERIFY(createFiles(tmp, files));
     QModelIndex root = model->index(tmp);
+    QStringList paths;
+    QModelIndexList indexes;
     QCOMPARE(model->rowCount(root), 0);
     for (int i = 0; i < files.count(); ++i) {
-        QVERIFY(model->index(tmp + '/' + files.at(i)).isValid());
+        const QString path = tmp + '/' + files.at(i);
+        const QModelIndex index = model->index(path);
+        QVERIFY(index.isValid());
+        paths.append(path);
+        indexes.append(index);
+    }
+
+    if (!QFileSystemEngine::isCaseSensitive()) {
+        // QTBUG-31103, QTBUG-64147: Verify that files can be accessed by paths with fLipPeD case.
+        for (int i = 0; i < paths.count(); ++i) {
+            const QModelIndex flippedCaseIndex = model->index(flipCase(paths.at(i)));
+            QCOMPARE(indexes.at(i), flippedCaseIndex);
+        }
     }
 }