add findByGameId-Method and Test

fh.fd.ci.server/src/main/java/de/fd/fh/server/game/web/GameController.java

@@ -1,6 +1,7 @@
 package de.fd.fh.server.game.web;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import de.fd.fh.server.game.Game;
 import de.fd.fh.server.game.GameId;
 import de.fd.fh.server.game.GameService;
 import de.fd.fh.server.user.UserId;
@@ -37,4 +38,21 @@ public class GameController
             response.status(201);
         }
     }
+
+    public void finGameById(final Request request, final Response response) throws IOException
+    {
+        final GameId gameId = GameId.of(request.params(":gameId"));
+
+        final Game game = service.findGameById(gameId);
+
+        if (game == null)
+        {
+            response.status(400);
+        }
+        else
+        {
+            response.body(objectMapper.writeValueAsString(game));
+            response.status(200);
+        }
+    }
 }

fh.fd.ci.server/src/test/java/de/fd/fh/server/game/web/GameControllerTest.java

@@ -1,5 +1,6 @@
 package de.fd.fh.server.game.web;
 
+import de.fd.fh.server.game.Game;
 import de.fd.fh.server.game.GameId;
 import de.fd.fh.server.game.GameService;
 import org.junit.jupiter.api.BeforeEach;
@@ -38,8 +39,8 @@ public class GameControllerTest
         when(request.body()).thenReturn("{\"whiteUserId\":\"12345\",\"blackUserId\":\"98765\"}");
         when(service.createGame(any(), any())).thenReturn(GameId.of("56789"));
 
-        ArgumentCaptor<String> bodyCaptor = ArgumentCaptor.forClass(String.class);
-        ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
+        final ArgumentCaptor<String> bodyCaptor = ArgumentCaptor.forClass(String.class);
+        final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
 
         new GameController(service).createGame(request, response);
 
@@ -59,7 +60,7 @@ public class GameControllerTest
         when(request.body()).thenReturn("{\"whiteUserId\":\"12345\",\"blackUserId\":\"98765\"}");
         when(service.createGame(any(), any())).thenReturn(null);
 
-        ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
+        final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
 
         new GameController(service).createGame(request, response);
 
@@ -68,4 +69,40 @@ public class GameControllerTest
         assertNotNull(statusCaptor.getValue());
         assertEquals(400, statusCaptor.getValue());
     }
+
+    @Test
+    void testFindGameById() throws IOException
+    {
+        when(request.params(any())).thenReturn("12345");
+        when(service.findGameById(any())).thenReturn(new Game());
+
+        final ArgumentCaptor<String> bodyCaptor = ArgumentCaptor.forClass(String.class);
+        final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
+
+        new GameController(service).finGameById(request, response);
+
+        verify(response).body(bodyCaptor.capture());
+        verify(response).status(statusCaptor.capture());
+
+        assertNotNull(bodyCaptor.getValue());
+
+        assertNotNull(statusCaptor.getValue());
+        assertEquals(200, statusCaptor.getValue());
+    }
+
+    @Test
+    void testFailedFindGameById() throws IOException
+    {
+        when(request.params(any())).thenReturn("12345");
+        when(service.findGameById(any())).thenReturn(null);
+
+        final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
+
+        new GameController(service).finGameById(request, response);
+
+        verify(response).status(statusCaptor.capture());
+
+        assertNotNull(statusCaptor.getValue());
+        assertEquals(400, statusCaptor.getValue());
+    }
 }