diff --git a/autotests/unit/file/CMakeLists.txt b/autotests/unit/file/CMakeLists.txt
--- a/autotests/unit/file/CMakeLists.txt
+++ b/autotests/unit/file/CMakeLists.txt
@@ -41,3 +41,12 @@
     LINK_LIBRARIES Qt5::Test Qt5::DBus KF5::Baloo baloofilecommon
 )
 
+#
+# Result Test
+#
+set(resultTest_SRC resulttest.cpp ../../../src/file/extractor/result.cpp)
+ecm_add_test(${resultTest_SRC}
+    TEST_NAME "resulttest"
+    LINK_LIBRARIES Qt5::Test Qt5::DBus KF5::Baloo baloofilecommon
+)
+
diff --git a/autotests/unit/file/resulttest.cpp b/autotests/unit/file/resulttest.cpp
new file mode 100644
--- /dev/null
+++ b/autotests/unit/file/resulttest.cpp
@@ -0,0 +1,55 @@
+/*
+ * <one line to give the library's name and an idea of what it does.>
+ * Copyright (C) 2018 Alexander Stippich <a.stippich@gmx.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "document.h"
+#include "extractor/result.h"
+
+#include <KFileMetaData/Properties>
+
+#include <QTest>
+
+using namespace Baloo;
+
+class ResultTest : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void testStringMerging()
+    {
+        Document doc;
+
+        Result result(QStringLiteral("test"),QStringLiteral("audo/mpeg3"),KFileMetaData::ExtractionResult::ExtractEverything);
+        result.setDocument(doc);
+
+        result.add(KFileMetaData::Property::Artist, QVariant(QStringLiteral("artist1")));
+        result.add(KFileMetaData::Property::Artist, QVariant(QStringLiteral("artist2")));
+
+        result.finish();
+        auto properties = result.map();
+        auto artist = properties.find(QString::number(KFileMetaData::Property::Artist));
+        QCOMPARE(artist->type(), QVariant::List);
+        QCOMPARE(artist->toStringList().join(", "), QStringLiteral("artist1, artist2"));
+    }
+};
+
+QTEST_MAIN(ResultTest)
+
+#include "resulttest.moc"