TST: add regression test

src/test/java/org/caosdb/server/grpc/CaosDBToGrpcConvertersTest.java

@@ -6,7 +6,9 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import java.util.TimeZone;
 import org.caosdb.api.entity.v1.Value.Builder;
 import org.caosdb.datetime.DateTimeFactory2;
+import org.caosdb.server.datatype.CollectionValue;
 import org.caosdb.server.datatype.GenericValue;
+import org.caosdb.server.datatype.ReferenceValue;
 import org.caosdb.server.datatype.Value;
 import org.caosdb.server.entity.EntityID;
 import org.caosdb.server.entity.FileProperties;
@@ -119,4 +121,53 @@ public class CaosDBToGrpcConvertersTest {
         "scalar_value {\n" + "  special_value: SPECIAL_VALUE_UNSPECIFIED\n" + "}\n",
         value.toString());
   }
+
+  @Test
+  public void testGetSelectedValueWithListOfReferenceValue() {
+    CollectionValue col = new CollectionValue();
+    Property p = new Property(new RetrieveEntity());
+    p.setName("Person");
+    p.setDatatype("List<Person>");
+
+    Property fullName1 = new Property(new RetrieveEntity());
+    fullName1.setName("full name");
+    fullName1.setDatatype("TEXT");
+    fullName1.setValue(new GenericValue("Harry Belafonte"));
+
+    RetrieveEntity person1 = new RetrieveEntity();
+    person1.addProperty(fullName1);
+    ReferenceValue val1 = new ReferenceValue(new EntityID(1234));
+    val1.setEntity(person1, false);
+    col.add(val1);
+
+    Property fullName2 = new Property(new RetrieveEntity());
+    fullName2.setName("full name");
+    fullName2.setDatatype("TEXT");
+    fullName2.setValue(new GenericValue("Louis Prima"));
+
+    RetrieveEntity person2 = new RetrieveEntity();
+    person2.addProperty(fullName2);
+    ReferenceValue val2 = new ReferenceValue(new EntityID(1234));
+    val2.setEntity(person2, false);
+    col.add(val2);
+    p.setValue(col);
+
+    RetrieveEntity entity = new RetrieveEntity();
+    entity.addProperty(p);
+
+    CaosDBToGrpcConverters converters = new CaosDBToGrpcConverters(null);
+    Builder value =
+        converters.getSelectedValue(
+            new Selection("Person").setSubSelection(new Selection("full name")), entity);
+    assertEquals(
+        "list_values {\n"
+            + "  values {\n"
+            + "    string_value: \"Harry Belafonte\"\n"
+            + "  }\n"
+            + "  values {\n"
+            + "    string_value: \"Louis Prima\"\n"
+            + "  }\n"
+            + "}\n",
+        value.toString());
+  }
 }