Add test only - Add test for L2 cache with orphanRemoval

src/test/java/org/tests/model/orphanremoval/OrpMaster.java

@@ -1,12 +1,16 @@
 package org.tests.model.orphanremoval;
 
+import io.ebean.annotation.Cache;
+
 import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.Id;
+import javax.persistence.JoinColumn;
 import javax.persistence.OneToMany;
 import javax.persistence.Version;
 import java.util.List;
 
+@Cache
 @Entity
 public class OrpMaster {
 
@@ -15,7 +19,8 @@ public class OrpMaster {
 
   String name;
 
-  @OneToMany(orphanRemoval = true, cascade = CascadeType.ALL)
+  @OneToMany(orphanRemoval = true, cascade = CascadeType.ALL)//, mappedBy = "master")
+  @JoinColumn(name = "master_id", referencedColumnName = "id")
   List<OrpDetail> details;
 
   @Version

src/test/java/org/tests/model/orphanremoval/TestOrphanRemoveO2M.java

@@ -33,4 +33,45 @@ public class TestOrphanRemoveO2M extends BaseTestCase {
     assertThat(sql).hasSize(2);
     assertThat(sql.get(0)).contains("delete from orp_detail where id=?");
   }
+
+  @Test
+  public void testCacheUse() {
+
+    // add test data first
+    OrpMaster m0 = new OrpMaster("m2", "master2");
+    m0.getDetails().add(new OrpDetail("d21", "d1"));
+    m0.getDetails().add(new OrpDetail("d22", "d2"));
+
+    Ebean.save(m0);
+
+    OrpMaster m1 = Ebean.find(OrpMaster.class, "m2");
+
+    m1.getDetails().clear();
+    m1.getDetails().add(new OrpDetail("d23", "d3"));
+    Ebean.save(m1);
+
+    m1 = Ebean.find(OrpMaster.class, "m2");
+    // Expect only one.
+    assertThat(m1.getDetails()).hasSize(1);
+    assertThat(m1.getDetails()).extracting("id").containsExactly("d23");
+
+    m1.getDetails().clear();
+    m1.getDetails().add(new OrpDetail("d24", "d4"));
+    m1.getDetails().add(new OrpDetail("d25", "d5"));
+    Ebean.save(m1);
+
+    m1 = Ebean.find(OrpMaster.class, "m2");
+    assertThat(m1.getDetails()).hasSize(2);
+    assertThat(m1.getDetails()).extracting("id").containsExactly("d24", "d25");
+
+
+    m1 = Ebean.find(OrpMaster.class)
+      .setId("m2")
+      .setUseCache(false)
+      .findOne();
+
+    // Expect only one.
+    assertThat(m1.getDetails()).hasSize(2);
+    assertThat(m1.getDetails()).extracting("id").containsExactly("d24", "d25");
+  }
 }