winrt: msvc2015: refactor file handling

msvc2015 reintroduced a couple of functions from the win32 API
towards WinRT.

Enable usage of those and simplify the file system engine.
Furthermore update the autotests.

Change-Id: I9eafffba0ddfd05917c184c4a6b9e166f86d71d9
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/auto/corelib/io/qabstractfileengine/tst_qabstractfileengine.cpp b/tests/auto/corelib/io/qabstractfileengine/tst_qabstractfileengine.cpp
index 977c396e21..8c4c8b48d7 100644
--- a/tests/auto/corelib/io/qabstractfileengine/tst_qabstractfileengine.cpp
+++ b/tests/auto/corelib/io/qabstractfileengine/tst_qabstractfileengine.cpp
@@ -52,6 +52,7 @@ class tst_QAbstractFileEngine
 {
     Q_OBJECT
 public slots:
+    void initTestCase();
     void cleanupTestCase();
 
 private slots:
@@ -64,6 +65,8 @@ private slots:
     void mounting();
 private:
     QStringList filesForRemoval;
+    QSharedPointer<QTemporaryDir> m_currentDir;
+    QString m_previousCurrent;
 };
 
 class ReferenceFileEngine
@@ -563,6 +566,14 @@ class FileEngineHandler
     }
 };
 
+void tst_QAbstractFileEngine::initTestCase()
+{
+    m_previousCurrent = QDir::currentPath();
+    m_currentDir = QSharedPointer<QTemporaryDir>(new QTemporaryDir());
+    QVERIFY2(!m_currentDir.isNull(), qPrintable("Could not create current directory."));
+    QDir::setCurrent(m_currentDir->path());
+}
+
 void tst_QAbstractFileEngine::cleanupTestCase()
 {
     bool failed = false;
@@ -576,6 +587,8 @@ void tst_QAbstractFileEngine::cleanupTestCase()
         }
 
     QVERIFY(!failed);
+
+    QDir::setCurrent(m_previousCurrent);
 }
 
 void tst_QAbstractFileEngine::customHandler()