#1782 - ENH: Add truncate(Class<?>... types) and truncate(String... tables)

src/test/java/org/tests/model/nofk/Test2NoFk.java

@@ -1,6 +1,7 @@
 package org.tests.model.nofk;
 
 import io.ebean.BaseTestCase;
+import io.ebean.DB;
 import io.ebean.Ebean;
 import io.ebean.bean.EntityBean;
 import io.ebean.bean.EntityBeanIntercept;
@@ -21,9 +22,8 @@ public class Test2NoFk extends BaseTestCase {
   @Before
   public void setup() {
     // Reset t
-    Ebean.find(EFile2NoFk.class).delete();
-    Ebean.find(EUserNoFk.class).delete();
-    Ebean.find(EUserNoFkSoftDel.class).delete();
+    DB.truncate(EFile2NoFk.class, EUserNoFk.class, EUserNoFkSoftDel.class);
+    assertThat(DB.find(EFile2NoFk.class).findCount()).isEqualTo(0);
 
     // There are two user accounts persisted in our database
     EUserNoFk root = new EUserNoFk();

src/test/java/org/tests/model/nofk/TestTruncate.java

@@ -0,0 +1,46 @@
+package org.tests.model.nofk;
+
+import io.ebean.DB;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestTruncate {
+
+  @Test
+  public void test_truncateByClass() {
+    DB.truncate(EUserNoFkSoftDel.class, EUserNoFk.class);
+
+    insertRows();
+    assertRowCounts(1);
+
+    DB.truncate(EUserNoFkSoftDel.class, EUserNoFk.class);
+    assertRowCounts(0);
+  }
+
+  @Test
+  public void test_truncateByTable() {
+    DB.truncate(EUserNoFkSoftDel.class, EUserNoFk.class);
+
+    insertRows();
+    assertRowCounts(1);
+
+    DB.truncate("euser_no_fk_soft_del", "euser_no_fk");
+    assertRowCounts(0);
+  }
+
+  private void insertRows() {
+    EUserNoFk root = new EUserNoFk();
+    root.setUserName("root");
+    DB.save(root);
+
+    EUserNoFkSoftDel rootSoftDel = new EUserNoFkSoftDel();
+    rootSoftDel.setUserName("root");
+    DB.save(rootSoftDel);
+  }
+
+  private void assertRowCounts(int expected) {
+    assertThat(DB.find(EUserNoFk.class).findCount()).isEqualTo(expected);
+    assertThat(DB.find(EUserNoFkSoftDel.class).findCount()).isEqualTo(expected);
+  }
+}