first commit

backend/src/test/java/com/xuezhanmaster/game/event/GameEventTest.java

@@ -0,0 +1,42 @@
+package com.xuezhanmaster.game.event;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class GameEventTest {
+
+    @Test
+    void shouldBuildResponseActionPayloadForFutureResponseEvents() {
+        GameEvent event = GameEvent.responseActionDeclared(
+                "game-1",
+                GameEventType.PENG_DECLARED,
+                2,
+                1,
+                "三万"
+        );
+
+        assertThat(event.eventType()).isEqualTo(GameEventType.PENG_DECLARED);
+        assertThat(event.seatNo()).isEqualTo(2);
+        assertThat(event.payload())
+                .containsEntry("actionType", "PENG")
+                .containsEntry("sourceSeatNo", 1)
+                .containsEntry("tile", "三万");
+    }
+
+    @Test
+    void shouldBuildStandardPublicTableEvents() {
+        GameEvent started = GameEvent.gameStarted("game-1", "room-1");
+        GameEvent phaseChanged = GameEvent.phaseChanged("game-1", "PLAYING");
+        GameEvent switched = GameEvent.turnSwitched("game-1", 3);
+
+        assertThat(started.eventType()).isEqualTo(GameEventType.GAME_STARTED);
+        assertThat(started.payload()).containsEntry("roomId", "room-1");
+
+        assertThat(phaseChanged.eventType()).isEqualTo(GameEventType.GAME_PHASE_CHANGED);
+        assertThat(phaseChanged.payload()).containsEntry("phase", "PLAYING");
+
+        assertThat(switched.eventType()).isEqualTo(GameEventType.TURN_SWITCHED);
+        assertThat(switched.payload()).containsEntry("currentSeatNo", 3);
+    }
+}