QResourceFileEngine: fix use of mapped files after close()

QFile::map() is documented to continue working after the QFile is
closed, so this should work for the resource file engine too.

Change-Id: I343f2beed55440a7ac0bfffd1563243a3966441f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/auto/corelib/io/qresourceengine/tst_qresourceengine.cpp b/tests/auto/corelib/io/qresourceengine/tst_qresourceengine.cpp
index 6461e6274f..0b50c391b8 100644
--- a/tests/auto/corelib/io/qresourceengine/tst_qresourceengine.cpp
+++ b/tests/auto/corelib/io/qresourceengine/tst_qresourceengine.cpp
@@ -410,6 +410,10 @@ void tst_QResourceEngine::checkStructure()
         QVERIFY2(ptr, qPrintable(file.errorString()));
         QByteArray ba = QByteArray::fromRawData(reinterpret_cast<const char *>(ptr), file.size());
         QCOMPARE(ba, contents);
+
+        // check that it is still valid after closing the file
+        file.close();
+        QCOMPARE(ba, contents);
     }
     QLocale::setDefault(QLocale::system());
 }