Started to restore clusters based recommendation engine

src/test/database/DatabaseTest.cpp

@@ -453,12 +453,24 @@ testSingleTrackSingleCluster(Session& session)
 		CHECK(track->getClusterIds().empty());
 	}
 
+	{
+		auto transaction {session.createSharedTransaction()};
+		CHECK(Track::getAllIdsWithClusters(session).empty());
+	}
+
 	{
 		auto transaction {session.createUniqueTransaction()};
 
 		cluster1.get().modify()->addTrack(track.get());
 	}
 
+	{
+		auto transaction {session.createSharedTransaction()};
+		auto tracks {Track::getAllIdsWithClusters(session)};
+		CHECK(tracks.size() == 1);
+		CHECK(tracks.front() == track.getId());
+	}
+
 	{
 		auto transaction {session.createSharedTransaction()};
 		auto clusters {Cluster::getAllOrphans(session)};
@@ -611,6 +623,11 @@ testSingleTrackSingleReleaseSingleCluster(Session& session)
 	ScopedClusterType clusterType {session, "MyClusterType"};
 	ScopedCluster cluster {session, clusterType .lockAndGet(), "MyCluster"};
 
+	{
+		auto transaction {session.createSharedTransaction()};
+		CHECK(Release::getAllIdsWithClusters(session).empty());
+	}
+
 	{
 		auto transaction {session.createUniqueTransaction()};
 
@@ -618,6 +635,13 @@ testSingleTrackSingleReleaseSingleCluster(Session& session)
 		cluster.get().modify()->addTrack(track.get());
 	}
 
+	{
+		auto transaction {session.createSharedTransaction()};
+		auto releases {Release::getAllIdsWithClusters(session)};
+		CHECK(releases.size() == 1);
+		CHECK(releases.front() == release.getId());
+	}
+
 	{
 		auto transaction {session.createSharedTransaction()};
 
@@ -858,6 +882,11 @@ testSingleTrackSingleReleaseSingleArtistSingleCluster(Session& session)
 	ScopedClusterType clusterType {session, "MyType"};
 	ScopedCluster cluster {session, clusterType.lockAndGet(), "MyCluster"};
 
+	{
+		auto transaction {session.createSharedTransaction()};
+		CHECK(Artist::getAllIdsWithClusters(session).empty());
+	}
+
 	{
 		auto transaction {session.createUniqueTransaction()};
 
@@ -875,6 +904,13 @@ testSingleTrackSingleReleaseSingleArtistSingleCluster(Session& session)
 		CHECK(Release::getAllOrphans(session).empty());
 	}
 
+	{
+		auto transaction {session.createSharedTransaction()};
+		auto artists {Artist::getAllIdsWithClusters(session)};
+		CHECK(artists.size() == 1);
+		CHECK(artists.front() == artist.getId());
+	}
+
 	{
 		auto transaction {session.createSharedTransaction()};