Tests: Always verify whether QTemporaryDir/File creation succeeded.

Use QVERIFY2() with QTemporaryDir/File::errorString() consistently.
Attempt to catch issues like the below warning and follow-up issues.

QSYSTEM: tst_QFiledialog::clearLineEdit() QFileSystemWatcher: FindNextChangeNotification failed for "C:\Users\qt\_____aaaaaaaaaaaaaaaaaaaaaa"  (Access is denied.)

Task-number: QTBUG-47370
Change-Id: I58a6e87c502627e976efa62ad73c912f3b2d49fa
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>

3 files changed, 8 insertions, 10 deletions

diff --git a/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp b/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp
index 07b75adae4..16fe959b11 100644
--- a/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp
+++ b/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp
@@ -194,7 +194,7 @@ void tst_QImageReader::initTestCase()
     prefix = QFINDTESTDATA("images/");
     if (prefix.isEmpty())
         QFAIL("Can't find images directory!");
-   QVERIFY(m_temporaryDir.isValid());
+   QVERIFY2(m_temporaryDir.isValid(), qPrintable(m_temporaryDir.errorString()));
 }
 
 void tst_QImageReader::cleanupTestCase()
diff --git a/tests/auto/gui/image/qimagewriter/tst_qimagewriter.cpp b/tests/auto/gui/image/qimagewriter/tst_qimagewriter.cpp
index 4f04e50294..06c775dded 100644
--- a/tests/auto/gui/image/qimagewriter/tst_qimagewriter.cpp
+++ b/tests/auto/gui/image/qimagewriter/tst_qimagewriter.cpp
@@ -416,7 +416,7 @@ void tst_QImageWriter::testCanWrite()
     {
         // check if canWrite won't leave an empty file
         QTemporaryDir dir;
-        QVERIFY(dir.isValid());
+        QVERIFY2(dir.isValid(), qPrintable(dir.errorString()));
         QString fileName(dir.path() + QLatin1String("/001.garble"));
         QVERIFY(!QFileInfo(fileName).exists());
         QImageWriter writer(fileName);
@@ -524,7 +524,7 @@ void tst_QImageWriter::saveToTemporaryFile()
     {
         // 1) Via QImageWriter's API, with a standard temp file name
         QTemporaryFile file;
-        QVERIFY(file.open());
+        QVERIFY2(file.open(), qPrintable(file.errorString()));
         QImageWriter writer(&file, "PNG");
         if (writer.canWrite())
             QVERIFY(writer.write(image));
@@ -538,7 +538,7 @@ void tst_QImageWriter::saveToTemporaryFile()
     {
         // 2) Via QImage's API, with a standard temp file name
         QTemporaryFile file;
-        QVERIFY(file.open());
+        QVERIFY2(file.open(), qPrintable(file.errorString()));
         QVERIFY(image.save(&file, "PNG"));
         file.reset();
         QImage tmp;
@@ -548,7 +548,7 @@ void tst_QImageWriter::saveToTemporaryFile()
     {
         // 3) Via QImageWriter's API, with a named temp file
         QTemporaryFile file("tempXXXXXX");
-        QVERIFY(file.open());
+        QVERIFY2(file.open(), qPrintable(file.errorString()));
         QImageWriter writer(&file, "PNG");
         QVERIFY(writer.write(image));
 #if defined(Q_OS_WINCE)
@@ -559,7 +559,7 @@ void tst_QImageWriter::saveToTemporaryFile()
     {
         // 4) Via QImage's API, with a named temp file
         QTemporaryFile file("tempXXXXXX");
-        QVERIFY(file.open());
+        QVERIFY2(file.open(), qPrintable(file.errorString()));
         QVERIFY(image.save(&file, "PNG"));
         file.reset();
         QImage tmp;
diff --git a/tests/auto/gui/painting/qpdfwriter/tst_qpdfwriter.cpp b/tests/auto/gui/painting/qpdfwriter/tst_qpdfwriter.cpp
index 4bc31baba8..5eaee1192a 100644
--- a/tests/auto/gui/painting/qpdfwriter/tst_qpdfwriter.cpp
+++ b/tests/auto/gui/painting/qpdfwriter/tst_qpdfwriter.cpp
@@ -50,8 +50,7 @@ private slots:
 void tst_QPdfWriter::basics()
 {
     QTemporaryFile file;
-    if (!file.open())
-        QSKIP("Couldn't open temp file!");
+    QVERIFY2(file.open(), qPrintable(file.errorString()));
     QPdfWriter writer(file.fileName());
 
     QCOMPARE(writer.title(), QString());
@@ -150,8 +149,7 @@ void tst_QPdfWriter::testPageMetrics()
     QSizeF sizeMMf = QSizeF(widthMMf, heightMMf);
 
     QTemporaryFile file;
-    if (!file.open())
-        QSKIP("Couldn't open temp file!");
+    QVERIFY2(file.open(), qPrintable(file.errorString()));
     QPdfWriter writer(file.fileName());
     QCOMPARE(writer.pageLayout().orientation(), QPageLayout::Portrait);