Added metaDataChanged(key,value) signal to metadata controls.

It may be more efficient and convenient for application to use this
signal instead of metaDataChanged().

metaDataChanged() signal is emitted for compatibility,
backends should emit both signals.

Signal added QMetadataReader/WritterControl,
QMediaObject and QMediaRecorder.

Change-Id: I5ca34a40e64b22034e6fde8cd7f9735cc3f72c68
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

1 files changed, 18 insertions, 7 deletions

diff --git a/tests/auto/unit/qmediarecorder/tst_qmediarecorder.cpp b/tests/auto/unit/qmediarecorder/tst_qmediarecorder.cpp
index c99308631..713159538 100644
--- a/tests/auto/unit/qmediarecorder/tst_qmediarecorder.cpp
+++ b/tests/auto/unit/qmediarecorder/tst_qmediarecorder.cpp
@@ -833,13 +833,24 @@ void tst_QMediaRecorder::metaDataChanged()
 
     QMediaRecorder recorder(&object);
 
-    QSignalSpy spy(&recorder, SIGNAL(metaDataChanged()));
-
-    service.mockMetaDataControl->metaDataChanged();
-    QCOMPARE(spy.count(), 1);
-
-    service.mockMetaDataControl->metaDataChanged();
-    QCOMPARE(spy.count(), 2);
+    QSignalSpy changedSpy(&recorder, SIGNAL(metaDataChanged()));
+    QSignalSpy changedWithValueSpy(&recorder, SIGNAL(metaDataChanged(QString,QVariant)));
+
+    service.mockMetaDataControl->setMetaData("key", "Value");
+    QCOMPARE(changedSpy.count(), 1);
+    QCOMPARE(changedWithValueSpy.count(), 1);
+    QCOMPARE(changedWithValueSpy.last()[0], QVariant("key"));
+    QCOMPARE(changedWithValueSpy.last()[1].value<QVariant>(), QVariant("Value"));
+
+    service.mockMetaDataControl->setMetaData("key", "Value");
+    QCOMPARE(changedSpy.count(), 1);
+    QCOMPARE(changedWithValueSpy.count(), 1);
+
+    service.mockMetaDataControl->setMetaData("key2", "Value");
+    QCOMPARE(changedSpy.count(), 2);
+    QCOMPARE(changedWithValueSpy.count(), 2);
+    QCOMPARE(changedWithValueSpy.last()[0], QVariant("key2"));
+    QCOMPARE(changedWithValueSpy.last()[1].value<QVariant>(), QVariant("Value"));
 }
 
 void tst_QMediaRecorder::metaData_data()