ebean/ebean-test/src/test/java/org/tests/m2m/TestM2MModifyTest.java

package org.tests.m2m;

import io.ebean.DB;
import io.ebean.xtest.BaseTestCase;
import org.junit.jupiter.api.Test;
import org.tests.model.basic.MRole;
import org.tests.model.basic.MUser;

import java.util.ArrayList;
import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;

public class TestM2MModifyTest extends BaseTestCase {

  @Test
  public void test() {

    // Create 2 roles r0 and r1
    MRole r0 = new MRole("r0");
    MRole r1 = new MRole("r1");

    // Save r1 and r2
    DB.save(r0);
    DB.save(r1);

    // Create a new user
    MUser u0 = new MUser("usr0");
    u0.addRole(r0);
    u0.addRole(r1);

    // Save the user
    DB.save(u0);

    List<MRole> roles = u0.getRoles();

    assertThat(roles).hasSize(2);

    u0 = DB.find(MUser.class, u0.getUserid());

    roles = u0.getRoles();
    assertThat(roles).hasSize(2);

    roles.clear();
    roles.add(r0);
    roles.add(r1);
    roles.remove(r1);

    DB.save(u0);

    u0 = DB.find(MUser.class, u0.getUserid());

    roles = u0.getRoles();
    assertThat(roles).hasSize(1);
  }

  @Test
  public void test1() {
    List<MRole> roles = new ArrayList<>();
    for (int i = 0; i < 56; i++) {
      MRole r0 = new MRole("mrole" + i);
      roles.add(r0);
    }

    DB.saveAll(roles);

    MUser u0 = new MUser("usr0");
    u0.getRoles().addAll(roles);

    DB.save(u0);

    u0 = DB.find(MUser.class, u0.getUserid());

    u0.getRoles().clear();
    u0.getRoles().addAll(roles);

    DB.save(u0);
  }
}