feat(java): add more tests

Author: ISAAC-XXYYZZ

sdk/java/src/test/java/com/kucoin/universal/sdk/test/e2e/ws/spot/PrivateTest.java

@@ -3,7 +3,6 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.kucoin.universal.sdk.api.DefaultKucoinClient;
 import com.kucoin.universal.sdk.api.KucoinClient;
-import com.kucoin.universal.sdk.generate.spot.spotprivate.OrderV2Event;
 import com.kucoin.universal.sdk.generate.spot.spotprivate.SpotPrivateWs;
 import com.kucoin.universal.sdk.model.ClientOption;
 import com.kucoin.universal.sdk.model.Constants;
@@ -124,13 +123,26 @@ public void testOrderV1() {
   }
 
   @Test
-  public void testOrderV2() throws InterruptedException {
+  public void testOrderV2() {
     CountDownLatch gotEvent = new CountDownLatch(1);
-    api.orderV2(
-        (String topic, String subject, OrderV2Event data) -> {
-          log.info("event: {}", data.toString());
-        });
-    Thread.sleep(1000000000);
+    CompletableFuture.supplyAsync(
+            () ->
+                api.orderV2(
+                    (__, ___, event) -> {
+                      log.info("event: {}", event.toString());
+                      gotEvent.countDown();
+                    }))
+        .thenApply(
+            id -> {
+              try {
+                gotEvent.await();
+              } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+              }
+              return id;
+            })
+        .thenAccept(id -> api.unSubscribe(id))
+        .join();
   }
 
   @Test