Fix tst_QImageReader::imageFormatBeforeRead

The test was never loading images from a valid path, and thus never
had any fullfill the base option which meant nothing was tested.

Making it work revealed that the Format option on BMP formats doesn't
predict semi-transparent files.

Change-Id: I7035a0f63ebfbce940ce7a17a6142cf177480798
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp b/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp
index 19948edcdf..574ad805ca 100644
--- a/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp
+++ b/tests/auto/gui/image/qimagereader/tst_qimagereader.cpp
@@ -728,13 +728,15 @@ void tst_QImageReader::imageFormatBeforeRead()
 
     SKIP_IF_UNSUPPORTED(format);
 
-    QImageReader reader(fileName);
+    QImageReader reader(prefix + fileName);
+    QVERIFY(reader.canRead());
     if (reader.supportsOption(QImageIOHandler::ImageFormat)) {
         QImage::Format fileFormat = reader.imageFormat();
         QCOMPARE(fileFormat, imageFormat);
         QSize size = reader.size();
         QImage image(size, fileFormat);
         QVERIFY(reader.read(&image));
+        QEXPECT_FAIL("bmp-3", "Semi-transparent BMPs not predicted", Continue);
         QCOMPARE(image.format(), fileFormat);
     }
 }