new GameRepository with findByGameId-Method and Test

fh.fd.ci.server/src/main/java/de/fd/fh/server/game/GameRepository.java

@@ -29,4 +29,10 @@ public class GameRepository
     {
         return datastore.save(access);
     }
+
+    Game findByGameId(final GameId gameId)
+    {
+        return datastore.createQuery(Game.class)
+            .field("id.identifier").equal(gameId.getIdentifier()).first();
+    }
 }

fh.fd.ci.server/src/test/java/de/fd/fh/server/game/GameRepositoryTest.java

@@ -71,4 +71,27 @@ class GameRepositoryTest
         assertNotNull(result.getId());
         assertEquals(2, result.getFields().size());
     }
+
+    @Test
+    void findByGameIdTest()
+    {
+        final Set<Field> fields = new HashSet<>();
+        fields.add(new Field(0, 0, Field.Color.BLACK, new Figure(Figure.Type.BISHOP, UserId.of("12345"))));
+        fields.add(new Field(0, 2, Field.Color.WHITE, new Figure(Figure.Type.BISHOP, UserId.of("98765"))));
+
+        final Game game = new Game(GameId.of("4242"), UserId.of("12345"), UserId.of("98765"), UserId.of("12345"), fields, UserId.of("12345"));
+
+        ds.save(game);
+
+        final Game result = repository.findByGameId(GameId.of("4242"));
+
+        assertNotNull(result);
+        assertEquals("12345", result.getWhitePlayer().getIdentifier());
+        assertEquals("12345", result.getCurrentPlayer().getIdentifier());
+        assertEquals("98765", result.getBlackPlayer().getIdentifier());
+        assertEquals("12345", result.getWinner().getIdentifier());
+        assertNotNull(result.getId());
+        assertEquals(2, result.getFields().size());
+    }
+
 }