#421 - ENH: Add support for unsetting the loaded state of a bean property (via BeanState) ... initial test

src/test/java/com/avaje/ebean/TestUnsetLoadedProperties.java

@@ -0,0 +1,73 @@
+package com.avaje.ebean;
+
+import com.avaje.ebean.bean.EntityBean;
+import com.avaje.ebean.bean.EntityBeanIntercept;
+import com.avaje.tests.model.converstation.User;
+import org.avaje.ebeantest.LoggedSqlCollector;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertTrue;
+
+public class TestUnsetLoadedProperties extends BaseTestCase {
+
+  @Test
+  public void testUnsetPropertyLoadedState() {
+
+    // populate db with a user
+    User seed = new User();
+    seed.setName("someName");
+    seed.setEmail("some@junk.com");
+    seed.save();
+
+
+    // our bean to perform stateless update
+    User user = new User();
+    user.setId(seed.getId());
+    user.setName("name mod");
+    user.setEmail("change@junk.com");
+
+
+    // confirm it's loaded state
+    EntityBean eb = (EntityBean)user;
+    EntityBeanIntercept ebi = eb._ebean_getIntercept();
+
+    int namePosition = ebi.findProperty("name");
+    assertTrue(ebi.isLoadedProperty(namePosition));
+
+    int emailPosition = ebi.findProperty("email");
+    assertTrue(ebi.isLoadedProperty(emailPosition));
+
+    BeanState beanState = Ebean.getBeanState(user);
+    assertThat(beanState.getLoadedProps()).containsExactly("id", "name", "email");
+
+    // unset the loaded state for email
+    //ebi.setPropertyUnloaded(emailPosition);
+    unloadProperty(user, "email");
+
+    assertThat(beanState.getLoadedProps()).containsExactly("id", "name");
+
+    LoggedSqlCollector.start();
+    user.update();
+
+    List<String> loggedSql = LoggedSqlCollector.stop();
+    assertThat(loggedSql).hasSize(1);
+    assertThat(loggedSql.get(0)).doesNotContain("email");
+
+  }
+
+  private void unloadProperty(Object entityBean, String propertyName) {
+
+    EntityBean eb = (EntityBean)entityBean;
+    EntityBeanIntercept ebi = eb._ebean_getIntercept();
+    int position = ebi.findProperty(propertyName);
+    if (position == -1) {
+      throw new RuntimeException("Property "+propertyName+" not found on bean "+entityBean.getClass());
+    }
+    ebi.setPropertyUnloaded(position);
+  }
+
+
+}