MyIntegrationTests.java

package com.example.demo;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.orm.jpa.AbstractEntityManagerFactoryBean;

import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.spy;

@SpringBootTest
class MyIntegrationTests {

  @Autowired
  private AbstractEntityManagerFactoryBean entityManagerFactoryBean;

  @Test
  void myIntegrationTest() {
    AbstractEntityManagerFactoryBean emfSpy = spy(entityManagerFactoryBean);
    doNothing().when(emfSpy).destroy();
  }
}