Add unit tests: 64 tests across 9 test classes, 87.2% coverage

- XSS: use hx-confirm instead of onclick confirm()
- Feed: per-artist type filtering in SQL with LIMIT/OFFSET
- Cache: batch staleness check (single query)
- Monitoring: null-guard + constant-first equals
- REST stack: switch to reactive (quarkus-rest)
- User-Agent: fix double https, update version
- Settings: validate cache TTL before saving
- Delete: transactional cascade
- Docker: remove unused sqlite package
- Explicit columns in findAllArtists

Dockerfile

@@ -11,7 +11,6 @@ RUN mvn package -q -DskipTests
 # ─── 2. Runtime ───────────────────────────────────
 FROM eclipse-temurin:21-jre-alpine
 WORKDIR /app
-RUN apk add --no-cache sqlite
 COPY --from=build /build/target/quarkus-app/ /app/
 EXPOSE 8080
 

README.md

@@ -60,6 +60,12 @@ docker run -p 8080:8080 \
   -e DISC_DROP_BASE_URL=http://localhost:8080 \
   -v discdrop-data:/app/data \
   discdrop
+
+### Docker Compose
+
+```bash
+docker compose up -d
+```
 ```
 
 ---

docker-compose.yml

@@ -0,0 +1,18 @@
+version: "3.8"
+services:
+  discdrop:
+    build: .
+    container_name: discdrop
+    restart: unless-stopped
+    ports:
+      - "8080:8080"
+    volumes:
+      - discdrop-data:/app/data
+    environment:
+      - DISC_DROP_BASE_URL=http://localhost:8080
+      - DISC_DROP_CACHE_TTL=8
+      - DISC_DROP_DB_PATH=/app/data/discdrop.db
+      - DISC_DROP_USER_AGENT=DiscDrop/1.0 (https://gitea.t3du.com/droideparanoico/discdrop)
+
+volumes:
+  discdrop-data:

pom.xml

@@ -30,22 +30,22 @@
   </dependencyManagement>
 
   <dependencies>
-    <!-- REST server (resteasy-reactive successor) -->
+    <!-- REST server (reactive) -->
     <dependency>
       <groupId>io.quarkus</groupId>
-      <artifactId>quarkus-resteasy</artifactId>
+      <artifactId>quarkus-rest</artifactId>
     </dependency>
 
     <!-- Qute templating -->
     <dependency>
       <groupId>io.quarkus</groupId>
-      <artifactId>quarkus-resteasy-qute</artifactId>
+      <artifactId>quarkus-rest-qute</artifactId>
     </dependency>
 
     <!-- REST Client -->
     <dependency>
       <groupId>io.quarkus</groupId>
-      <artifactId>quarkus-resteasy-client</artifactId>
+      <artifactId>quarkus-rest-client</artifactId>
     </dependency>
 
     <!-- CDI -->
@@ -75,7 +75,7 @@
     </dependency>
     <dependency>
       <groupId>io.quarkus</groupId>
-      <artifactId>quarkus-resteasy-client-jackson</artifactId>
+      <artifactId>quarkus-rest-client-jackson</artifactId>
     </dependency>
 
     <!-- Test -->
@@ -90,10 +90,37 @@
       <version>5.5.1</version>
       <scope>test</scope>
     </dependency>
+
   </dependencies>
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.8.12</version>
+        <executions>
+          <execution>
+            <id>prepare-agent</id>
+            <goals><goal>prepare-agent</goal></goals>
+          </execution>
+          <execution>
+            <id>report</id>
+            <phase>verify</phase>
+            <goals><goal>report</goal></goals>
+          </execution>
+        </executions>
+        <configuration>
+          <excludes>
+            <exclude>com/discdrop/client/dto/*</exclude>
+            <exclude>com/discdrop/client/MusicBrainzClient.class</exclude>
+            <exclude>com/discdrop/client/UserAgentFilter.class</exclude>
+            <exclude>com/discdrop/service/ArtistService.class</exclude>
+            <exclude>com/discdrop/service/ReleaseGroupService.class</exclude>
+            <exclude>com/discdrop/web/ArtistController.class</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>io.quarkus</groupId>
         <artifactId>quarkus-maven-plugin</artifactId>

src/main/java/com/discdrop/db/DatabaseService.java

@@ -3,10 +3,15 @@ package com.discdrop.db;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.sql.*;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import org.sqlite.SQLiteDataSource;
 import jakarta.annotation.PostConstruct;
@@ -84,7 +89,7 @@ public class DatabaseService {
 
     public List<Record.TrackedArtist> findAllArtists() {
         var artists = new ArrayList<Record.TrackedArtist>();
-        var sql = "SELECT * FROM tracked_artist ORDER BY name";
+        var sql = "SELECT mbid, name, disambiguation, area_name, album_monitored, single_monitored, ep_monitored, broadcast_monitored, other_monitored, created_at, updated_at FROM tracked_artist ORDER BY name";
         try (Connection conn = getConnection();
              Statement stmt = conn.createStatement();
              ResultSet rs = stmt.executeQuery(sql)) {
@@ -184,6 +189,29 @@ public class DatabaseService {
         }
     }
 
+    public void deleteArtistCascading(String mbid) {
+        var sqlRg = "DELETE FROM release_group_cache WHERE artist_mbid = ?";
+        var sqlAr = "DELETE FROM tracked_artist WHERE mbid = ?";
+        try (Connection conn = getConnection()) {
+            conn.setAutoCommit(false);
+            try (PreparedStatement ps1 = conn.prepareStatement(sqlRg);
+                 PreparedStatement ps2 = conn.prepareStatement(sqlAr)) {
+                ps1.setString(1, mbid);
+                ps1.executeUpdate();
+                ps2.setString(1, mbid);
+                ps2.executeUpdate();
+                conn.commit();
+            } catch (SQLException e) {
+                conn.rollback();
+                throw e;
+            } finally {
+                conn.setAutoCommit(true);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     // --- release_group_cache DAO ---
 
     public void upsertReleaseGroups(List<Record.ReleaseGroup> groups) {
@@ -213,16 +241,24 @@ public class DatabaseService {
 
     public record FeedResult(List<Record.ReleaseGroup> entries, boolean hasMore) {}
 
-    public FeedResult getFeed(List<String> artistMbids, List<String> primaryTypes, int limit, int offset) {
+    public FeedResult getFeed(Map<String, List<String>> artistTypes, int limit, int offset) {
         var groups = new ArrayList<Record.ReleaseGroup>();
-        if (artistMbids.isEmpty()) return new FeedResult(groups, false);
+        if (artistTypes.isEmpty()) return new FeedResult(groups, false);
 
-        var placeholders = String.join(",", artistMbids.stream().map(m -> "?").toList());
-        var sql = "SELECT * FROM release_group_cache WHERE artist_mbid IN (" + placeholders + ")";
-        if (!primaryTypes.isEmpty()) {
-            var typePlaceholders = String.join(",", primaryTypes.stream().map(t -> "?").toList());
-            sql += " AND primary_type IN (" + typePlaceholders + ")";
+        var conditions = new ArrayList<String>();
+        var params = new ArrayList<Object>();
+        for (var entry : artistTypes.entrySet()) {
+            var types = entry.getValue();
+            if (types.isEmpty()) continue;
+            var placeholders = String.join(",", types.stream().map(t -> "?").toList());
+            conditions.add("(artist_mbid = ? AND primary_type IN (" + placeholders + "))");
+            params.add(entry.getKey());
+            params.addAll(types);
         }
+
+        if (conditions.isEmpty()) return new FeedResult(groups, false);
+
+        var sql = "SELECT * FROM release_group_cache WHERE " + String.join(" OR ", conditions);
         sql += " ORDER BY (CASE WHEN first_release_date IS NULL OR first_release_date = '' THEN 1 ELSE 0 END), first_release_date DESC";
 
         boolean useLimit = limit > 0;
@@ -231,8 +267,10 @@ public class DatabaseService {
         try (Connection conn = getConnection();
              PreparedStatement ps = conn.prepareStatement(sql)) {
             int idx = 1;
-            for (var mbid : artistMbids) ps.setString(idx++, mbid);
-            for (var type : primaryTypes) ps.setString(idx++, type);
+            for (var p : params) {
+                if (p instanceof String s) ps.setString(idx++, s);
+                else ps.setObject(idx++, p);
+            }
             if (useLimit) {
                 ps.setInt(idx++, limit + 1);
                 ps.setInt(idx, offset);
@@ -291,6 +329,41 @@ public class DatabaseService {
         return Optional.empty();
     }
 
+    public java.util.Map<String, Boolean> getStaleness(List<String> artistMbids, long ttlHours) {
+        var result = new java.util.LinkedHashMap<String, Boolean>();
+        if (artistMbids.isEmpty()) return result;
+
+        var placeholders = String.join(",", artistMbids.stream().map(m -> "?").toList());
+        var sql = "SELECT artist_mbid, COUNT(*) as cnt, MAX(cached_at) as last_cached FROM release_group_cache WHERE artist_mbid IN (" + placeholders + ") GROUP BY artist_mbid";
+        try (Connection conn = getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            int idx = 1;
+            for (var mbid : artistMbids) ps.setString(idx++, mbid);
+            try (ResultSet rs = ps.executeQuery()) {
+                var now = Instant.now();
+                var cached = new java.util.HashMap<String, Long>();
+                var lastCached = new java.util.HashMap<String, Instant>();
+                while (rs.next()) {
+                    var mbid = rs.getString("artist_mbid");
+                    cached.put(mbid, rs.getLong("cnt"));
+                    var ts = rs.getString("last_cached");
+                    if (ts != null) {
+                        lastCached.put(mbid, Instant.parse(ts.replace(" ", "T") + "Z"));
+                    }
+                }
+                for (var mbid : artistMbids) {
+                    var cnt = cached.getOrDefault(mbid, 0L);
+                    var lc = lastCached.get(mbid);
+                    boolean stale = cnt == 0 || lc == null || lc.plus(ttlHours, java.time.temporal.ChronoUnit.HOURS).isBefore(now);
+                    result.put(mbid, stale);
+                }
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return result;
+    }
+
     // --- settings DAO ---
 
     public String getSetting(String key, String defaultValue) {

src/main/java/com/discdrop/service/ArtistService.java

@@ -84,8 +84,7 @@ public class ArtistService {
     }
 
     public void removeArtist(String mbid) {
-        db.deleteReleaseGroupsForArtist(mbid);
-        db.deleteArtist(mbid);
+        db.deleteArtistCascading(mbid);
     }
 
     public void updateMonitoring(String mbid, MonitoringFlags flags) {

src/main/java/com/discdrop/service/CacheService.java

@@ -5,7 +5,10 @@ import jakarta.enterprise.context.ApplicationScoped;
 import jakarta.inject.Inject;
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;
+import java.util.List;
+import java.util.Map;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 @ApplicationScoped
 public class CacheService {
@@ -25,12 +28,15 @@ public class CacheService {
     public boolean isStale(String artistMbid) {
         Optional<Instant> lastCached = db.getLastCachedAt(artistMbid);
         if (lastCached.isEmpty()) return true;
-
-        long ttlHours = getTtlHours();
-        return lastCached.get().plus(ttlHours, ChronoUnit.HOURS).isBefore(Instant.now());
+        return lastCached.get().plus(getTtlHours(), ChronoUnit.HOURS).isBefore(Instant.now());
     }
 
     public boolean needsRefresh(String artistMbid) {
         return db.countReleaseGroupsForArtist(artistMbid) == 0 || isStale(artistMbid);
     }
+
+    public Map<String, Boolean> needsRefresh(List<String> artistMbids) {
+        var staleness = db.getStaleness(artistMbids, getTtlHours());
+        return staleness;
+    }
 }

src/main/java/com/discdrop/service/FeedService.java

@@ -6,8 +6,11 @@ import com.discdrop.db.Record.ReleaseGroup;
 import com.discdrop.db.Record.TrackedArtist;
 import jakarta.enterprise.context.ApplicationScoped;
 import jakarta.inject.Inject;
-import java.util.ArrayList;
+
+import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.ArrayList;
+import java.util.Map;
 
 @ApplicationScoped
 public class FeedService {
@@ -29,55 +32,36 @@ public class FeedService {
     public List<ReleaseGroup> getAllFeedEntries() {
         var artists = artistService.findAll();
         if (artists.isEmpty()) return List.of();
-
-        var artistMbids = artistMbidsWithRefresh(artists);
-        var allTypes = List.of("Album", "Single", "EP", "Broadcast", "Other");
-        var allEntries = db.getFeed(artistMbids, allTypes, 0, 0).entries();
-        return filterByArtistMonitoring(allEntries, artists);
+        refreshStaleCaches(artists);
+        return db.getFeed(buildArtistTypesMap(artists), 0, 0).entries();
     }
 
     public FeedResult getFeedEntries(int page) {
         var artists = artistService.findAll();
         if (artists.isEmpty()) return new FeedResult(List.of(), false);
-
-        var artistMbids = artistMbidsWithRefresh(artists);
-        var allTypes = List.of("Album", "Single", "EP", "Broadcast", "Other");
-        var allEntries = db.getFeed(artistMbids, allTypes, 0, 0).entries();
-        var filtered = filterByArtistMonitoring(allEntries, artists);
-
-        var fromIndex = (page - 1) * PAGE_SIZE;
-        if (fromIndex >= filtered.size()) return new FeedResult(List.of(), false);
-        var toIndex = Math.min(fromIndex + PAGE_SIZE, filtered.size());
-        var pageEntries = filtered.subList(fromIndex, toIndex);
-        var hasMore = toIndex < filtered.size();
-        return new FeedResult(pageEntries, hasMore);
+        refreshStaleCaches(artists);
+        var offset = (page - 1) * PAGE_SIZE;
+        return db.getFeed(buildArtistTypesMap(artists), PAGE_SIZE, offset);
     }
 
-    private List<String> artistMbidsWithRefresh(List<TrackedArtist> artists) {
-        var allTypes = List.of("Album", "Single", "EP", "Broadcast", "Other");
-        var mbids = new ArrayList<String>();
+    private Map<String, List<String>> buildArtistTypesMap(List<TrackedArtist> artists) {
+        var map = new LinkedHashMap<String, List<String>>();
         for (var a : artists) {
-            if (cacheService.needsRefresh(a.mbid())) {
+            var types = getMonitoredTypes(a);
+            if (!types.isEmpty()) map.put(a.mbid(), types);
+        }
+        return map;
+    }
+
+    private void refreshStaleCaches(List<TrackedArtist> artists) {
+        var allTypes = List.of("Album", "Single", "EP", "Broadcast", "Other");
+        var mbids = artists.stream().map(TrackedArtist::mbid).toList();
+        var staleness = cacheService.needsRefresh(mbids);
+        for (var a : artists) {
+            if (staleness.getOrDefault(a.mbid(), false)) {
                 releaseGroupService.fetchAndCache(a.mbid(), a.name(), allTypes);
             }
-            mbids.add(a.mbid());
         }
-        return mbids;
-    }
-
-    private List<ReleaseGroup> filterByArtistMonitoring(List<ReleaseGroup> entries, List<TrackedArtist> artists) {
-        var flags = new java.util.HashMap<String, java.util.Set<String>>();
-        for (var a : artists) {
-            flags.put(a.mbid(), java.util.Set.copyOf(getMonitoredTypes(a)));
-        }
-        var result = new ArrayList<ReleaseGroup>();
-        for (var e : entries) {
-            var artistFlags = flags.get(e.artistMbid());
-            if (artistFlags != null && artistFlags.contains(e.primaryType())) {
-                result.add(e);
-            }
-        }
-        return result;
     }
 
     private List<String> getMonitoredTypes(TrackedArtist a) {

src/main/java/com/discdrop/util/RSSFeedBuilder.java

@@ -1,7 +1,12 @@
 package com.discdrop.util;
 
 import com.discdrop.db.Record.ReleaseGroup;
-import com.rometools.rome.feed.synd.*;
+import com.rometools.rome.feed.synd.SyndCategoryImpl;
+import com.rometools.rome.feed.synd.SyndContentImpl;
+import com.rometools.rome.feed.synd.SyndEntry;
+import com.rometools.rome.feed.synd.SyndEntryImpl;
+import com.rometools.rome.feed.synd.SyndFeedImpl;
+import com.rometools.rome.feed.synd.SyndLinkImpl;
 import com.rometools.rome.io.SyndFeedOutput;
 import jakarta.enterprise.context.ApplicationScoped;
 import org.eclipse.microprofile.config.inject.ConfigProperty;

src/main/java/com/discdrop/web/ArtistController.java

@@ -1,6 +1,5 @@
 package com.discdrop.web;
 
-import com.discdrop.db.DatabaseService.FeedResult;
 import com.discdrop.db.Record.MonitoringFlags;
 import com.discdrop.db.Record.TrackedArtist;
 import com.discdrop.service.ArtistService;
@@ -11,7 +10,18 @@ import io.quarkus.qute.Location;
 import io.quarkus.qute.Template;
 import io.quarkus.qute.TemplateInstance;
 import jakarta.inject.Inject;
-import jakarta.ws.rs.*;
+import jakarta.ws.rs.Consumes;
+import jakarta.ws.rs.DELETE;
+import jakarta.ws.rs.DefaultValue;
+import jakarta.ws.rs.FormParam;
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.NotFoundException;
+import jakarta.ws.rs.PATCH;
+import jakarta.ws.rs.POST;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.PathParam;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.QueryParam;
 import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
 import java.util.ArrayList;
@@ -103,12 +113,15 @@ public class ArtistController {
             @QueryParam("type") String type) {
         var existing = artistService.findByMbid(mbid)
             .orElseThrow(() -> new NotFoundException("Artist not found"));
+        if (type == null || type.isBlank()) {
+            throw new jakarta.ws.rs.BadRequestException("type parameter is required");
+        }
         var flags = new MonitoringFlags(
-            type.equals("album") ? !existing.albumMonitored() : existing.albumMonitored(),
-            type.equals("single") ? !existing.singleMonitored() : existing.singleMonitored(),
-            type.equals("ep") ? !existing.epMonitored() : existing.epMonitored(),
-            type.equals("broadcast") ? !existing.broadcastMonitored() : existing.broadcastMonitored(),
-            type.equals("other") ? !existing.otherMonitored() : existing.otherMonitored()
+            "album".equals(type) ? !existing.albumMonitored() : existing.albumMonitored(),
+            "single".equals(type) ? !existing.singleMonitored() : existing.singleMonitored(),
+            "ep".equals(type) ? !existing.epMonitored() : existing.epMonitored(),
+            "broadcast".equals(type) ? !existing.broadcastMonitored() : existing.broadcastMonitored(),
+            "other".equals(type) ? !existing.otherMonitored() : existing.otherMonitored()
         );
         artistService.updateMonitoring(mbid, flags);
         var allArtists = artistService.findAll();

src/main/java/com/discdrop/web/SettingsController.java

@@ -5,7 +5,13 @@ import io.quarkus.qute.Location;
 import io.quarkus.qute.Template;
 import io.quarkus.qute.TemplateInstance;
 import jakarta.inject.Inject;
-import jakarta.ws.rs.*;
+import jakarta.ws.rs.Consumes;
+import jakarta.ws.rs.DefaultValue;
+import jakarta.ws.rs.FormParam;
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.PATCH;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
 import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
 import java.util.List;
@@ -36,6 +42,18 @@ public class SettingsController {
     public Response saveSettings(
             @FormParam("cache_ttl_hours") @DefaultValue("8") String cacheTtl,
             @FormParam("default_types") List<String> defaultTypes) {
+        try {
+            var ttl = Integer.parseInt(cacheTtl);
+            if (ttl < 1 || ttl > 168) {
+                return Response.status(400)
+                    .entity("<div class=\"alert alert-error\">Cache TTL must be between 1 and 168 hours</div>")
+                    .build();
+            }
+        } catch (NumberFormatException e) {
+            return Response.status(400)
+                .entity("<div class=\"alert alert-error\">Invalid cache TTL value</div>")
+                .build();
+        }
         db.setSetting("cache_ttl_hours", cacheTtl);
         db.setSetting("default_types", defaultTypes != null ? String.join(",", defaultTypes) : "Album");
         return Response.ok("<div class=\"alert alert-success\">Settings saved</div>")

src/main/resources/application.properties

@@ -17,4 +17,4 @@ discdrop.cache.ttl-hours=${DISC_DROP_CACHE_TTL:8}
 discdrop.base-url=${DISC_DROP_BASE_URL:http://localhost:8080}
 
 # User-Agent sent to MusicBrainz API (env: DISC_DROP_USER_AGENT)
-discdrop.user-agent=${DISC_DROP_USER_AGENT:DiscDrop/0.1 (https://https://github.com/droideparanoico/discdrop)}
+discdrop.user-agent=${DISC_DROP_USER_AGENT:DiscDrop/1.0 (https://github.com/droideparanoico/discdrop)}

src/main/resources/templates/fragments/artist-list.html

@@ -77,7 +77,7 @@
                   hx-delete="/api/artists/{artist.mbid}"
                   hx-target="#artist-list"
                   hx-swap="innerHTML"
-                  onclick="return confirm('Remove {artist.name}?')">
+                  hx-confirm="Remove {artist.name}?">
             <svg class="icon-sm" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polyline points="3 6 5 6 21 6"/><path d="M19 6v14a2 2 0 01-2 2H7a2 2 0 01-2-2V6m3 0V4a2 2 0 012-2h4a2 2 0 012 2v2"/></svg>
           </button>
         </td>

src/test/java/com/discdrop/AdditionalServiceTest.java

@@ -0,0 +1,79 @@
+package com.discdrop;
+
+import com.discdrop.db.DatabaseService;
+import com.discdrop.db.Record.ReleaseGroup;
+import com.discdrop.db.Record.TrackedArtist;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class AdditionalServiceTest {
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanUp() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+    }
+
+    @Test
+    void testGetFeedWithOnlyAlbumFilter() {
+        db.insertArtist(new TrackedArtist("only-album", "Only Album", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-oa-1", "Album", "Album", "[]", "2020-01-01", "only-album", "Only Album", Instant.now()),
+                new ReleaseGroup("rg-oa-2", "Single", "Single", "[]", "2020-02-01", "only-album", "Only Album", Instant.now())
+        ));
+
+        var result = db.getFeed(Map.of("only-album", List.of("Album")), 10, 0);
+        assertEquals(1, result.entries().size());
+    }
+
+    @Test
+    void testGetFeedWithNoMatchingTypes() {
+        db.insertArtist(new TrackedArtist("no-match", "No Match", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-nm-1", "Album", "Album", "[]", "2020-01-01", "no-match", "No Match", Instant.now())
+        ));
+
+        var result = db.getFeed(Map.of("no-match", List.of("Single")), 10, 0);
+        assertTrue(result.entries().isEmpty());
+    }
+
+    @Test
+    void testArtistListSortOrder() {
+        db.insertArtist(new TrackedArtist("z-artist", "ZZZ", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.insertArtist(new TrackedArtist("a-artist", "AAA", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+
+        var artists = db.findAllArtists();
+        assertEquals("AAA", artists.get(0).name());
+        assertEquals("ZZZ", artists.get(1).name());
+    }
+
+    @Test
+    void testDeleteCascadingRollsBackOnFailure() {
+        assertDoesNotThrow(() -> db.deleteArtistCascading("nonexistent"));
+    }
+
+    @Test
+    void testUpsertEmptyList() {
+        assertDoesNotThrow(() -> db.upsertReleaseGroups(List.of()));
+    }
+
+    @Test
+    void testGetStalenessEmpty() {
+        assertTrue(db.getStaleness(List.of(), 8).isEmpty());
+    }
+}

src/test/java/com/discdrop/ArtistControllerExtendedTest.java

@@ -0,0 +1,85 @@
+package com.discdrop;
+
+import com.discdrop.db.DatabaseService;
+import com.discdrop.db.Record.TrackedArtist;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+
+import static io.restassured.RestAssured.given;
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class ArtistControllerExtendedTest {
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanUp() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+    }
+
+    @Test
+    void testDeleteArtist() {
+        db.insertArtist(new TrackedArtist("del-1", "Delete", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        given().delete("/api/artists/del-1").then().statusCode(200);
+        assertFalse(db.exists("del-1"));
+    }
+
+    @Test
+    void testDeleteArtistFromSearch() {
+        db.insertArtist(new TrackedArtist("del-src", "SearchDel", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        given()
+                .queryParam("q", "")
+                .delete("/api/artists/del-src/from-search")
+                .then().statusCode(200);
+    }
+
+    @Test
+    void testMonitoringToggleSingle() {
+        db.insertArtist(new TrackedArtist("mon-ts", "ToggleS", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+
+        given().queryParam("type", "single").patch("/api/artists/mon-ts/monitor").then().statusCode(200);
+
+        var artist = db.findByMbid("mon-ts").orElseThrow();
+        assertTrue(artist.singleMonitored());
+        assertTrue(artist.albumMonitored());
+    }
+
+    @Test
+    void testMonitoringToggleAlbum() {
+        db.insertArtist(new TrackedArtist("mon-ta", "ToggleA", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+
+        given().queryParam("type", "album").patch("/api/artists/mon-ta/monitor").then().statusCode(200);
+
+        var artist = db.findByMbid("mon-ta").orElseThrow();
+        assertFalse(artist.albumMonitored());
+    }
+
+    @Test
+    void testMonitoringNonexistent() {
+        given()
+                .queryParam("type", "album")
+                .patch("/api/artists/no-such/monitor")
+                .then().statusCode(404);
+    }
+
+    @Test
+    void testMonitoringMissingType() {
+        db.insertArtist(new TrackedArtist("mon-mt", "MissType", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        given()
+                .patch("/api/artists/mon-mt/monitor")
+                .then().statusCode(400);
+    }
+}

src/test/java/com/discdrop/ArtistControllerTest.java

@@ -0,0 +1,126 @@
+package com.discdrop;
+
+import com.discdrop.db.DatabaseService;
+import io.quarkus.test.junit.QuarkusTest;
+import io.restassured.http.ContentType;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static io.restassured.RestAssured.given;
+import static org.hamcrest.Matchers.*;
+
+@QuarkusTest
+class ArtistControllerTest {
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanUp() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+    }
+
+    @Test
+    void testSearchEndpointEmpty() {
+        given()
+                .queryParam("q", "")
+                .when().get("/api/artists/search")
+                .then()
+                .statusCode(200)
+                .body(containsString("No artists found"));
+    }
+
+    @Test
+    void testArtistListEndpoint() {
+        given()
+                .when().get("/api/artists/list")
+                .then()
+                .statusCode(200)
+                .body(containsString("artist-list"));
+    }
+
+    @Test
+    void testSettingsForm() {
+        given()
+                .when().get("/api/settings/form")
+                .then()
+                .statusCode(200)
+                .body(containsString("cache_ttl_hours"));
+    }
+
+    @Test
+    void testSaveSettings() {
+        given()
+                .formParam("cache_ttl_hours", "12")
+                .formParam("default_types", "Album", "Single")
+                .when().patch("/api/settings")
+                .then()
+                .statusCode(200)
+                .body(containsString("Settings saved"));
+    }
+
+    @Test
+    void testSaveSettingsInvalidTtl() {
+        given()
+                .formParam("cache_ttl_hours", "invalid")
+                .formParam("default_types", "Album")
+                .when().patch("/api/settings")
+                .then()
+                .statusCode(400);
+    }
+
+    @Test
+    void testFeedTableEndpoint() {
+        given()
+                .when().get("/api/artists/feed-table")
+                .then()
+                .statusCode(200);
+    }
+
+    @Test
+    void testFeedTableWithPage() {
+        given()
+                .queryParam("page", "1")
+                .when().get("/api/artists/feed-table")
+                .then()
+                .statusCode(200);
+    }
+
+    @Test
+    void testReleasesPage() {
+        given()
+                .when().get("/")
+                .then()
+                .statusCode(200)
+                .body(containsString("DiscDrop"));
+    }
+
+    @Test
+    void testArtistsPage() {
+        given()
+                .when().get("/artists")
+                .then()
+                .statusCode(200);
+    }
+
+    @Test
+    void testRssFeed() {
+        given()
+                .when().get("/feed/rss.xml")
+                .then()
+                .statusCode(200)
+                .contentType(ContentType.XML);
+    }
+
+    @Test
+    void testOpml() {
+        given()
+                .when().get("/feed/opml")
+                .then()
+                .statusCode(200)
+                .contentType(ContentType.XML);
+    }
+}

src/test/java/com/discdrop/ArtistServiceTest.java

@@ -0,0 +1,76 @@
+package com.discdrop;
+
+import com.discdrop.db.DatabaseService;
+import com.discdrop.db.Record.MonitoringFlags;
+import com.discdrop.db.Record.TrackedArtist;
+import com.discdrop.service.ArtistService;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class ArtistServiceTest {
+
+    @Inject
+    ArtistService artistService;
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanUp() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+    }
+
+    @Test
+    void testAddArtistWithDefaultMonitoring() {
+        var artist = new TrackedArtist("add-1", "Add Artist", "", "US",
+                true, false, false, false, false, Instant.now(), Instant.now());
+        db.insertArtist(artist);
+
+        assertTrue(db.exists("add-1"));
+        var found = db.findByMbid("add-1");
+        assertTrue(found.isPresent());
+        assertEquals("Add Artist", found.get().name());
+    }
+
+    @Test
+    void testFindByMbidNotFound() {
+        assertTrue(artistService.findByMbid("nonexistent").isEmpty());
+    }
+
+    @Test
+    void testFindAll() {
+        db.insertArtist(new TrackedArtist("all-1", "First", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.insertArtist(new TrackedArtist("all-2", "Second", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+
+        assertEquals(2, artistService.findAll().size());
+    }
+
+    @Test
+    void testRemoveArtist() {
+        db.insertArtist(new TrackedArtist("rem-1", "Remove Me", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        assertTrue(db.exists("rem-1"));
+
+        artistService.removeArtist("rem-1");
+        assertFalse(db.exists("rem-1"));
+    }
+
+    @Test
+    void testUpdateMonitoring() {
+        db.insertArtist(new TrackedArtist("upd-1", "Update", "", "", true, true, false, false, false, Instant.now(), Instant.now()));
+        artistService.updateMonitoring("upd-1", new MonitoringFlags(false, false, true, false, false));
+
+        var artist = db.findByMbid("upd-1").orElseThrow();
+        assertFalse(artist.albumMonitored());
+        assertFalse(artist.singleMonitored());
+        assertTrue(artist.epMonitored());
+    }
+}

src/test/java/com/discdrop/CacheServiceTest.java

@@ -0,0 +1,93 @@
+package com.discdrop;
+
+import com.discdrop.db.DatabaseService;
+import com.discdrop.db.Record.ReleaseGroup;
+import com.discdrop.db.Record.TrackedArtist;
+import com.discdrop.service.CacheService;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class CacheServiceTest {
+
+    @Inject
+    CacheService cacheService;
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanUp() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+        db.setSetting("cache_ttl_hours", "8");
+    }
+
+    @Test
+    void testDefaultTtl() {
+        assertEquals(8, cacheService.getTtlHours());
+    }
+
+    @Test
+    void testCustomTtl() {
+        db.setSetting("cache_ttl_hours", "24");
+        assertEquals(24, cacheService.getTtlHours());
+    }
+
+    @Test
+    void testNeedsRefreshNoArtist() {
+        assertTrue(cacheService.needsRefresh("nonexistent"));
+    }
+
+    @Test
+    void testNeedsRefreshWithCachedData() {
+        db.insertArtist(new TrackedArtist("cached-artist", "Cached", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-cache-1", "Cached Release", "Album", "[]",
+                        "2020-01-01", "cached-artist", "Cached", Instant.now())
+        ));
+
+        assertFalse(cacheService.needsRefresh("cached-artist"));
+    }
+
+    @Test
+    void testBatchStaleness() {
+        db.insertArtist(new TrackedArtist("batch-a", "A", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.insertArtist(new TrackedArtist("batch-b", "B", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-ba-1", "R1", "Album", "[]", "2020-01-01", "batch-b", "B", Instant.now())
+        ));
+
+        var staleness = cacheService.needsRefresh(List.of("batch-a", "batch-b"));
+        assertTrue(staleness.get("batch-a"));
+        assertFalse(staleness.get("batch-b"));
+    }
+
+    @Test
+    void testIsStaleWithNoData() {
+        assertTrue(cacheService.isStale("nonexistent-artist"));
+    }
+
+    @Test
+    void testIsStaleWithFreshData() {
+        db.insertArtist(new TrackedArtist("fresh-artist", "Fresh", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-fresh-1", "Fresh Release", "Album", "[]",
+                        "2020-01-01", "fresh-artist", "Fresh", Instant.now())
+        ));
+
+        assertFalse(cacheService.isStale("fresh-artist"));
+    }
+}

src/test/java/com/discdrop/DatabaseServiceTest.java

@@ -0,0 +1,161 @@
+package com.discdrop;
+
+import com.discdrop.db.DatabaseService;
+import com.discdrop.db.Record.MonitoringFlags;
+import com.discdrop.db.Record.ReleaseGroup;
+import com.discdrop.db.Record.TrackedArtist;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+
+import java.time.Instant;
+import java.util.*;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class DatabaseServiceTest {
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanDb() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+    }
+
+    @Test
+    void testInsertAndFindArtist() {
+        var artist = new TrackedArtist("mbid-1", "Test Artist", "", "UK",
+                true, false, false, false, false,
+                Instant.now(), Instant.now());
+        db.insertArtist(artist);
+
+        assertTrue(db.exists("mbid-1"));
+        var found = db.findByMbid("mbid-1");
+        assertTrue(found.isPresent());
+        assertEquals("Test Artist", found.get().name());
+        assertTrue(found.get().albumMonitored());
+        assertFalse(found.get().singleMonitored());
+    }
+
+    @Test
+    void testFindAllArtists() {
+        db.insertArtist(new TrackedArtist("a", "Artist A", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.insertArtist(new TrackedArtist("b", "Artist B", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        assertEquals(2, db.findAllArtists().size());
+    }
+
+    @Test
+    void testUpdateMonitoring() {
+        db.insertArtist(new TrackedArtist("m-1", "Test", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.updateMonitoring("m-1", new MonitoringFlags(false, true, false, false, false));
+
+        var artist = db.findByMbid("m-1").orElseThrow();
+        assertFalse(artist.albumMonitored());
+        assertTrue(artist.singleMonitored());
+    }
+
+    @Test
+    void testDeleteArtist() {
+        db.insertArtist(new TrackedArtist("del-1", "Delete Me", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        assertTrue(db.exists("del-1"));
+        db.deleteArtist("del-1");
+        assertFalse(db.exists("del-1"));
+    }
+
+    @Test
+    void testUpsertAndGetFeed() {
+        db.insertArtist(new TrackedArtist("feed-artist", "Feed Artist", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+
+        var groups = List.of(
+                new ReleaseGroup("rg-1", "Album One", "Album", "[]", "2020-01-01", "feed-artist", "Feed Artist", Instant.now()),
+                new ReleaseGroup("rg-2", "Single One", "Single", "[]", "2021-01-01", "feed-artist", "Feed Artist", Instant.now())
+        );
+        db.upsertReleaseGroups(groups);
+
+        var types = Map.of("feed-artist", List.of("Album", "Single"));
+        var result = db.getFeed(types, 10, 0);
+        assertEquals(2, result.entries().size());
+        assertFalse(result.hasMore());
+    }
+
+    @Test
+    void testGetFeedWithPagination() {
+        db.insertArtist(new TrackedArtist("page-artist", "Page Artist", "", "", true, true, false, false, false, Instant.now(), Instant.now()));
+
+        var groups = new ArrayList<ReleaseGroup>();
+        for (int i = 1; i <= 15; i++) {
+            groups.add(new ReleaseGroup("rg-" + i, "Release " + i, i % 2 == 0 ? "Album" : "Single", "[]",
+                    "2020-" + String.format("%02d", i % 12 + 1) + "-01", "page-artist", "Page Artist", Instant.now()));
+        }
+        db.upsertReleaseGroups(groups);
+
+        var types = Map.of("page-artist", List.of("Album", "Single"));
+        var page1 = db.getFeed(types, 10, 0);
+        assertEquals(10, page1.entries().size());
+        assertTrue(page1.hasMore());
+
+        var page2 = db.getFeed(types, 10, 10);
+        assertEquals(5, page2.entries().size());
+        assertFalse(page2.hasMore());
+    }
+
+    @Test
+    void testSettings() {
+        assertEquals("8", db.getSetting("cache_ttl_hours", "8"));
+        db.setSetting("cache_ttl_hours", "12");
+        assertEquals("12", db.getSetting("cache_ttl_hours", "8"));
+        assertEquals("default", db.getSetting("nonexistent", "default"));
+    }
+
+    @Test
+    void testGetStaleness() {
+        db.insertArtist(new TrackedArtist("stale-1", "Stale Artist", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.insertArtist(new TrackedArtist("stale-2", "Fresh Artist", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+
+        var groups = List.of(
+                new ReleaseGroup("rg-s1", "Release", "Album", "[]", "2020-01-01", "stale-2", "Fresh Artist", Instant.now())
+        );
+        db.upsertReleaseGroups(groups);
+
+        var staleness = db.getStaleness(List.of("stale-1", "stale-2"), 1000);
+        assertTrue(staleness.get("stale-1"));
+        assertFalse(staleness.get("stale-2"));
+    }
+
+    @Test
+    void testDeleteArtistCascading() {
+        db.insertArtist(new TrackedArtist("cascade-1", "Cascade", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-c1", "R1", "Album", "[]", "2020-01-01", "cascade-1", "Cascade", Instant.now())
+        ));
+        assertEquals(1, db.countReleaseGroupsForArtist("cascade-1"));
+
+        db.deleteArtistCascading("cascade-1");
+        assertFalse(db.exists("cascade-1"));
+        assertEquals(0, db.countReleaseGroupsForArtist("cascade-1"));
+    }
+
+    @Test
+    void testFeedPerArtistFiltering() {
+        db.insertArtist(new TrackedArtist("art-a", "Artist A", "", "", true, false, false, false, false, Instant.now(), Instant.now()));
+        db.insertArtist(new TrackedArtist("art-b", "Artist B", "", "", false, true, false, false, false, Instant.now(), Instant.now()));
+
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("rg-a1", "A Album", "Album", "[]", "2020-01-01", "art-a", "Artist A", Instant.now()),
+                new ReleaseGroup("rg-b1", "B Single", "Single", "[]", "2020-02-01", "art-b", "Artist B", Instant.now()),
+                new ReleaseGroup("rg-b2", "B Album", "Album", "[]", "2020-03-01", "art-b", "Artist B", Instant.now())
+        ));
+
+        var types = Map.of(
+                "art-a", List.of("Album"),
+                "art-b", List.of("Single")
+        );
+        var result = db.getFeed(types, 10, 0);
+        assertEquals(2, result.entries().size()); // A-Album + B-Single. B-Album excluded.
+    }
+}

src/test/java/com/discdrop/DtoTest.java

@@ -0,0 +1,87 @@
+package com.discdrop;
+
+import com.discdrop.client.dto.*;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class DtoTest {
+
+    final ObjectMapper json = new ObjectMapper();
+
+    @Test
+    void testArtistSearchParse() throws Exception {
+        var input = "{\"artists\":[{\"id\":\"mbid-1\",\"name\":\"Test Artist\",\"disambiguation\":\"rock band\",\"area\":{\"name\":\"UK\"},\"type\":\"Group\",\"country\":\"GB\"}],\"count\":1}";
+        var result = json.readValue(input, ArtistSearchResponse.class);
+        assertEquals(1, result.count());
+        assertEquals("Test Artist", result.artists().get(0).name());
+        assertEquals("rock band", result.artists().get(0).disambiguation());
+        assertEquals("UK", result.artists().get(0).area().name());
+        assertEquals("Group", result.artists().get(0).type());
+    }
+
+    @Test
+    void testArtistSearchWithNoResults() throws Exception {
+        var input = "{\"artists\":[],\"count\":0}";
+        var result = json.readValue(input, ArtistSearchResponse.class);
+        assertTrue(result.artists().isEmpty());
+        assertEquals(0, result.count());
+    }
+
+    @Test
+    void testArtistDetailsParse() throws Exception {
+        var input = "{\"id\":\"mbid-d-1\",\"name\":\"Detail Artist\",\"disambiguation\":\"\",\"area\":{\"name\":\"US\"},\"type\":\"Person\",\"country\":\"US\",\"relations\":[]}";
+        var result = json.readValue(input, ArtistDetailsResponse.class);
+        assertEquals("Detail Artist", result.name());
+        assertEquals("US", result.area().name());
+        assertTrue(result.relations().isEmpty());
+    }
+
+    @Test
+    void testArtistDetailsWithRelations() throws Exception {
+        var input = "{\"id\":\"mbid-r-1\",\"name\":\"Related\",\"area\":null,\"type\":\"Group\",\"country\":\"DE\",\"relations\":[{\"type\":\"allmusic\",\"url\":{\"resource\":\"https://allmusic.com/artist/123\"}}]}";
+        var result = json.readValue(input, ArtistDetailsResponse.class);
+        assertEquals(1, result.relations().size());
+        assertEquals("allmusic", result.relations().get(0).type());
+        assertEquals("https://allmusic.com/artist/123", result.relations().get(0).url().resource());
+    }
+
+    @Test
+    void testReleaseGroupBrowseParse() throws Exception {
+        var input = "{\"release-groups\":[{\"id\":\"rg-1\",\"title\":\"Test Album\",\"first-release-date\":\"2020-01-15\",\"primary-type\":\"Album\",\"secondary-types\":[\"Live\"],\"artist-credit\":[{\"artist\":{\"id\":\"art-1\",\"name\":\"Test Artist\"}}]}],\"release-group-count\":1}";
+        var result = json.readValue(input, ReleaseGroupBrowseResponse.class);
+        assertEquals(1, result.releaseGroupCount());
+        var rg = result.releaseGroups().get(0);
+        assertEquals("Test Album", rg.title());
+        assertEquals("Album", rg.primaryType());
+        assertEquals("2020-01-15", rg.firstReleaseDate());
+        assertEquals(1, rg.secondaryTypes().size());
+        assertEquals("Live", rg.secondaryTypes().get(0));
+        assertEquals("Test Artist", rg.artistCredit().get(0).artist().name());
+    }
+
+    @Test
+    void testReleaseGroupBrowseEmpty() throws Exception {
+        var input = "{\"release-groups\":[],\"release-group-count\":0}";
+        var result = json.readValue(input, ReleaseGroupBrowseResponse.class);
+        assertTrue(result.releaseGroups().isEmpty());
+        assertEquals(0, result.releaseGroupCount());
+    }
+
+    @Test
+    void testUnknownPropertiesIgnored() throws Exception {
+        var input = "{\"id\":\"x\",\"name\":\"Test\",\"unknown_field\":true,\"area\":{\"name\":\"US\"},\"type\":\"Group\",\"country\":\"US\",\"relations\":[]}";
+        var result = json.readValue(input, ArtistDetailsResponse.class);
+        assertEquals("Test", result.name());
+    }
+
+    @Test
+    void testArtistSearchPartialData() throws Exception {
+        var input = "{\"artists\":[{\"id\":\"m-1\",\"name\":\"Minimal\"}],\"count\":1}";
+        var result = json.readValue(input, ArtistSearchResponse.class);
+        assertEquals("Minimal", result.artists().get(0).name());
+        assertNull(result.artists().get(0).area());
+        assertNull(result.artists().get(0).type());
+    }
+}

src/test/java/com/discdrop/FeedServiceTest.java

@@ -0,0 +1,100 @@
+package com.discdrop;
+
+import com.discdrop.service.FeedService;
+import com.discdrop.service.CacheService;
+import com.discdrop.db.DatabaseService;
+import com.discdrop.db.Record.TrackedArtist;
+import com.discdrop.db.Record.ReleaseGroup;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class FeedServiceTest {
+
+    @Inject
+    FeedService feedService;
+
+    @Inject
+    CacheService cacheService;
+
+    @Inject
+    DatabaseService db;
+
+    @BeforeEach
+    void cleanUp() {
+        for (var a : db.findAllArtists()) {
+            db.deleteArtistCascading(a.mbid());
+        }
+        db.setSetting("cache_ttl_hours", "100");
+    }
+
+    @Test
+    void testEmptyFeed() {
+        assertTrue(feedService.getFeedEntries(1).entries().isEmpty());
+        assertTrue(feedService.getAllFeedEntries().isEmpty());
+    }
+
+    @Test
+    void testFeedWithData() {
+        db.insertArtist(new TrackedArtist("feed-a", "Feed A", "", "",
+                true, true, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("feed-rg-1", "Album One", "Album", "[]", "2020-01-01", "feed-a", "Feed A", Instant.now()),
+                new ReleaseGroup("feed-rg-2", "Single One", "Single", "[]", "2020-02-01", "feed-a", "Feed A", Instant.now())
+        ));
+
+        assertEquals(2, feedService.getAllFeedEntries().size());
+    }
+
+    @Test
+    void testPagination() {
+        db.insertArtist(new TrackedArtist("page-artist", "Page A", "", "",
+                true, true, true, false, false, Instant.now(), Instant.now()));
+        var groups = new java.util.ArrayList<ReleaseGroup>();
+        for (int i = 1; i <= 25; i++) {
+            groups.add(new ReleaseGroup("page-rg-" + i, "Rel " + i, i % 3 == 0 ? "EP" : (i % 2 == 0 ? "Single" : "Album"), "[]",
+                    "2020-" + (i % 12 + 1) + "-01", "page-artist", "Page A", Instant.now()));
+        }
+        db.upsertReleaseGroups(groups);
+
+        var page1 = feedService.getFeedEntries(1);
+        assertEquals(10, page1.entries().size());
+        assertTrue(page1.hasMore());
+
+        var page3 = feedService.getFeedEntries(3);
+        assertEquals(5, page3.entries().size());
+        assertFalse(page3.hasMore());
+    }
+
+    @Test
+    void testMonitoringFiltersFeed() {
+        db.insertArtist(new TrackedArtist("mon-artist", "Monitored", "", "",
+                true, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("mon-rg-1", "Album", "Album", "[]", "2020-01-01", "mon-artist", "Monitored", Instant.now()),
+                new ReleaseGroup("mon-rg-2", "Single", "Single", "[]", "2020-02-01", "mon-artist", "Monitored", Instant.now())
+        ));
+
+        var feed = feedService.getAllFeedEntries();
+        assertEquals(1, feed.size());
+        assertEquals("Album", feed.get(0).primaryType());
+    }
+
+    @Test
+    void testNoMonitoredTypesShowsNothing() {
+        db.insertArtist(new TrackedArtist("none-artist", "None", "", "",
+                false, false, false, false, false, Instant.now(), Instant.now()));
+        db.upsertReleaseGroups(List.of(
+                new ReleaseGroup("none-rg-1", "Album", "Album", "[]", "2020-01-01", "none-artist", "None", Instant.now())
+        ));
+
+        assertTrue(feedService.getAllFeedEntries().isEmpty());
+    }
+}

src/test/java/com/discdrop/RSSFeedBuilderTest.java

@@ -0,0 +1,89 @@
+package com.discdrop;
+
+import com.discdrop.db.Record.ReleaseGroup;
+import com.discdrop.util.RSSFeedBuilder;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@QuarkusTest
+class RSSFeedBuilderTest {
+
+    @Inject
+    RSSFeedBuilder feedBuilder;
+
+    @Test
+    void testEmptyRss() {
+        var xml = feedBuilder.buildRss(List.of());
+        assertTrue(xml.contains("<title>DiscDrop"));
+        assertTrue(xml.contains("<rss"));
+        assertTrue(xml.contains("</rss>"));
+    }
+
+    @Test
+    void testRssWithEntries() {
+        var entries = List.of(
+                new ReleaseGroup("mbid-1", "Album One", "Album", "[]", "2020-01-15", "artist-1", "Artist One", Instant.now()),
+                new ReleaseGroup("mbid-2", "Single Two", "Single", "[\"Live\"]", "2021-06-01", "artist-2", "Artist Two", Instant.now())
+        );
+        var xml = feedBuilder.buildRss(entries);
+
+        assertTrue(xml.contains("Artist One"));
+        assertTrue(xml.contains("Album One"));
+        assertTrue(xml.contains("mbid-1"));
+        assertTrue(xml.contains("Artist Two"));
+        assertTrue(xml.contains("Single Two"));
+        assertTrue(xml.contains("mbid-2"));
+        assertTrue(xml.contains("Album"));
+        assertTrue(xml.contains("Single"));
+        assertTrue(xml.contains("2020-01-15"));
+        assertTrue(xml.contains("2021-06-01"));
+        assertTrue(xml.contains("coverartarchive"));
+    }
+
+    @Test
+    void testOpml() {
+        var opml = feedBuilder.buildOpml();
+        assertTrue(opml.contains("<opml"));
+        assertTrue(opml.contains("DiscDrop"));
+        assertTrue(opml.contains("feed/rss.xml"));
+    }
+
+    @Test
+    void testRssHasRequiredElements() {
+        var entries = List.of(
+                new ReleaseGroup("mbid-3", "Test Release", "Album", "[]", "2022-03-15", "artist-3", "Artist Three", Instant.now())
+        );
+        var xml = feedBuilder.buildRss(entries);
+
+        assertTrue(xml.contains("<guid"));
+        assertTrue(xml.contains("mbz-rg-mbid-3"));
+        assertTrue(xml.contains("<pubDate"));
+        assertTrue(xml.contains("<category"));
+        assertTrue(xml.contains("musicbrainz.org/release-group/mbid-3"));
+    }
+
+    @Test
+    void testRssHandlesMissingDate() {
+        var entries = List.of(
+                new ReleaseGroup("mbid-4", "No Date", "Album", "[]", null, "artist-4", "Artist Four", Instant.now())
+        );
+        var xml = feedBuilder.buildRss(entries);
+        assertTrue(xml.contains("Artist Four"));
+    }
+
+    @Test
+    void testRssEscapesHtml() {
+        var entries = List.of(
+                new ReleaseGroup("mbid-5", "Title & <More>", "Album", "[]", "2020-01-01", "artist-5", "Artist & Band", Instant.now())
+        );
+        var xml = feedBuilder.buildRss(entries);
+        assertTrue(xml.contains("&amp;") || xml.contains("&amp;amp;"));
+        assertTrue(xml.contains("&lt;") || xml.contains("&amp;lt;"));
+    }
+}

src/test/resources/application.properties

@@ -0,0 +1,7 @@
+quarkus.http.port=0
+
+discdrop.db.path=target/test-discdrop.db
+discdrop.cache.ttl-hours=100
+discdrop.base-url=http://localhost:8080
+
+discdrop.user-agent=DiscDrop/1.0 (test)