Test that QAudioDecoder emits error when source has no audio track

This patch adds a test that verifies that QAudioDecoder is well behaved
when no audio track is present in the input media file.

Task-number: QTBUG-123597
Pick-to: 6.5
Change-Id: Iecf745cab3b0cd70506399c06d9a7fdd15d29e8a
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
(cherry picked from commit cd8330b98314faf1bbdd069e5c74e0e97765260b)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 301900232721c035f3caad2d5146f940abf0fe15)

2 files changed, 19 insertions, 4 deletions

diff --git a/tests/auto/integration/qaudiodecoderbackend/testdata/test-no-audio-track.mp4 b/tests/auto/integration/qaudiodecoderbackend/testdata/test-no-audio-track.mp4
new file mode 100644
index 000000000..6b67a3433
--- /dev/null
+++ b/tests/auto/integration/qaudiodecoderbackend/testdata/test-no-audio-track.mp4
diff --git a/tests/auto/integration/qaudiodecoderbackend/tst_qaudiodecoderbackend.cpp b/tests/auto/integration/qaudiodecoderbackend/tst_qaudiodecoderbackend.cpp
index 3b3864491..f26b23977 100644
--- a/tests/auto/integration/qaudiodecoderbackend/tst_qaudiodecoderbackend.cpp
+++ b/tests/auto/integration/qaudiodecoderbackend/tst_qaudiodecoderbackend.cpp
@@ -7,10 +7,11 @@
 
 #include "../shared/mediafileselector.h"
 
-#define TEST_FILE_NAME "testdata/test.wav"
-#define TEST_UNSUPPORTED_FILE_NAME "testdata/test-unsupported.avi"
-#define TEST_CORRUPTED_FILE_NAME "testdata/test-corrupted.wav"
-#define TEST_INVALID_SOURCE "invalid"
+constexpr char TEST_FILE_NAME[] = "testdata/test.wav";
+constexpr char TEST_UNSUPPORTED_FILE_NAME[] = "testdata/test-unsupported.avi";
+constexpr char TEST_CORRUPTED_FILE_NAME[] = "testdata/test-corrupted.wav";
+constexpr char TEST_INVALID_SOURCE[] = "invalid";
+constexpr char TEST_NO_AUDIO_TRACK[] = "testdata/test-no-audio-track.mp4";
 
 QT_USE_NAMESPACE
 
@@ -42,6 +43,7 @@ private slots:
     void corruptedFileTest();
     void invalidSource();
     void deviceTest();
+    void play_emitsFormatError_whenMediaHasNoAudioTrack();
 
 private:
     QUrl testFileUrl(const QString filePath);
@@ -921,6 +923,19 @@ void tst_QAudioDecoderBackend::deviceTest()
     QCOMPARE(d.duration(), qint64(-1));
 }
 
+void tst_QAudioDecoderBackend::play_emitsFormatError_whenMediaHasNoAudioTrack() {
+    QAudioDecoder decoder;
+
+    QSignalSpy errors{ &decoder, qOverload<QAudioDecoder::Error>(&QAudioDecoder::error) };
+
+    decoder.setSource(testFileUrl(TEST_NO_AUDIO_TRACK));
+    decoder.start();
+
+    QTRY_VERIFY(!errors.empty());
+
+    QCOMPARE_EQ(decoder.error(), QAudioDecoder::Error::FormatError);
+}
+
 QTEST_MAIN(tst_QAudioDecoderBackend)
 
 #include "tst_qaudiodecoderbackend.moc"