ENH: Add query.usingDatabase(database) - add better test

src/test/java/io/ebeaninternal/server/transaction/DefaultTransactionThreadLocalTest.java

@@ -103,6 +103,33 @@ public class DefaultTransactionThreadLocalTest extends BaseTestCase {
     }
   }
 
+  @ForPlatform(Platform.H2)
+  @Test
+  public void usingDatabase() {
+
+    // setup
+    Database otherDb = createOtherDatabase();
+    EBasicVer bean = new EBasicVer("TestUsingDatabase");
+    otherDb.save(bean);
+
+    // act
+    final EBasicVer foundOtherDb = DB.find(EBasicVer.class)
+      .usingDatabase(otherDb)
+      .where().eq("name", "TestUsingDatabase")
+      .findOne();
+
+    assertNotNull(foundOtherDb);
+    assertThat(foundOtherDb.getId()).isEqualTo(bean.getId());
+
+    final EBasicVer foundDefaultDb = DB.find(EBasicVer.class)
+      .where().eq("name", "TestUsingDatabase")
+      .findOne();
+
+    assertNull(foundDefaultDb);
+
+    otherDb.delete(bean);
+  }
+
 
   private Database createOtherDatabase() {