fix(async): 尝试修复 #49 中提到的问题

demo/src/test/java/cc/carm/lib/easysql/EasySQLTest.java

@@ -18,7 +18,7 @@ public class EasySQLTest {
     protected SQLManager sqlManager;
 
     @Before
-    public void initDatabase() {
+    public void initialize() {
         HikariConfig config = new HikariConfig();
         config.setDriverClassName("org.h2.Driver");
         config.setJdbcUrl("jdbc:h2:mem:test;DB_CLOSE_DELAY=-1;MODE=MYSQL;");
@@ -28,7 +28,7 @@ public class EasySQLTest {
     }
 
     @After
-    public void shutdownDatabase() {
+    public void shutdown() {
         if (sqlManager.getDataSource() instanceof HikariDataSource) {
             //Close bee connection pool
             ((HikariDataSource) sqlManager.getDataSource()).close();
@@ -50,6 +50,7 @@ public class EasySQLTest {
         tests.add(new SQLUpdateReturnKeysTest());
         tests.add(new QueryCloseTest());
         tests.add(new QueryFunctionTest());
+        tests.add(new QueryAsyncTest());
 //        tests.add(new DeleteTest());
 
         print("准备进行测试...");

demo/src/test/java/cc/carm/lib/easysql/tests/QueryAsyncTest.java

@@ -0,0 +1,33 @@
+package cc.carm.lib.easysql.tests;
+
+import cc.carm.lib.easysql.TestHandler;
+import cc.carm.lib.easysql.api.SQLManager;
+
+import java.sql.SQLException;
+
+public class QueryAsyncTest extends TestHandler {
+
+
+    @Override
+    public void onTest(SQLManager sqlManager) throws SQLException {
+
+        sqlManager.createQuery()
+                .inTable("test_user_table")
+                .orderBy("id", false)
+                .setLimit(1)
+                .build().executeAsync(query -> {
+                    try {
+                        Thread.sleep(1000L);
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+
+                    if (!query.getResultSet().next()) {
+                        System.out.println("id (ps): NULL");
+                    } else {
+                        System.out.println("id (ps): " + query.getResultSet().getInt("id"));
+                    }
+                });
+
+    }
+}