add fake replay test

Author: JasperGeurtz

src/test/java/bwapi/GameBuilder.java

@@ -2,6 +2,7 @@
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.nio.Buffer;
 import java.nio.ByteBuffer;
 import java.nio.file.Files;
 import java.nio.file.Paths;
@@ -14,10 +15,12 @@ public static Game createGame() throws IOException {
     }
 
     public static Game createGame(String mapName) throws IOException {
-        final String location = "src/test/resources/" + mapName + "_frame0_buffer.bin";
+        final ByteBuffer buffer = binToBuffer("src/test/resources/" + mapName + "_frame0_buffer.bin");
+        return createGame(new Client(buffer));
+    }
 
-        // load bytebuffer
-        final byte[] compressedBytes = Files.readAllBytes(Paths.get(location));
+    public static ByteBuffer binToBuffer(String binLocation) throws IOException {
+        final byte[] compressedBytes = Files.readAllBytes(Paths.get(binLocation));
         final ByteArrayOutputStream out = new ByteArrayOutputStream();
         final InflaterOutputStream zin = new InflaterOutputStream(out);
         zin.write(compressedBytes);
@@ -26,8 +29,10 @@ public static Game createGame(String mapName) throws IOException {
         final byte[] bytes = out.toByteArray();
         final ByteBuffer buffer = ByteBuffer.allocateDirect(bytes.length);
         buffer.put(bytes);
+        return buffer;
+    }
 
-        final Client client = new Client(buffer);
+    public static Game createGame(Client client) throws IOException {
         final Game game = new Game(client);
         game.init();
         return game;

src/test/java/bwapi/GameTest.java

@@ -4,9 +4,12 @@
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
 
+import java.io.IOException;
+import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.List;
 import org.junit.Before;
+import org.junit.Test;
 import org.junit.experimental.theories.DataPoints;
 import org.junit.experimental.theories.FromDataPoints;
 import org.junit.experimental.theories.Theories;
@@ -82,4 +85,21 @@ public void shouldNotFindNonOverlappingUnits(
         // THEN
         assertThat(unitsInRectangle).doesNotContain(dummy);
     }
+
+    @Test
+    public void ifReplaySelfAndEnemyShouldBeNull() throws IOException {
+        ByteBuffer buffer = GameBuilder.binToBuffer("src/test/resources/" + "(2)Benzene.scx" + "_frame0_buffer.bin");
+
+        Client client = new Client(buffer);
+        // modify the buffer to fake a replay
+        client.gameData().setIsReplay(true);
+
+        Game game = GameBuilder.createGame(client);
+
+        assertThat(game.isReplay());
+        assertThat(game.self() == null);
+        assertThat(game.enemy() == null);
+        assertThat(game.enemies().isEmpty());
+        assertThat(game.allies().isEmpty());
+    }
 }