Junit data jpa test

You can do the test by using spring boot junit test.

- structure

- build.gradle

group 'org.blog.test'
version '1.0-SNAPSHOT'

apply plugin: 'java'
apply plugin: 'spring-boot'

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.4.0.RELEASE")
    }
}

repositories {
    mavenCentral()
}

dependencies {
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-test', version: '1.4.0.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '1.4.0.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: '1.4.0.RELEASE'
    compile group: 'com.h2database', name: 'h2', version: '1.4.192'
    compile group: 'org.projectlombok', name: 'lombok', version: '1.16.10'
    compile group: 'junit', name: 'junit', version: '4.12'
}

- TestTable.java

package org.blog.test.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class TestTable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String name;

    public TestTable(String name) {
        this.name = name;
    }
}

- TestRepository.java

package org.blog.test.repository;

import org.blog.test.entity.TestTable;
import org.springframework.data.repository.CrudRepository;

import java.util.List;

public interface TestRepository extends CrudRepository {

    List findByName(String name);
}

- JunitApplication.java

package org.blog.test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class JunitApplication {
    public static void main(String[] args) {
        SpringApplication.run(JunitApplication.class, args);
    }
}

- TestRepositoryTest.java

package org.blog.test.repository;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;

import java.util.List;

import org.blog.test.entity.TestTable;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@DataJpaTest
public class TestRepositoryTest {

    @Autowired
    private TestEntityManager testEntityManager;

    @Autowired
    private TestRepository testRepository;

    @Test
    public void findByName() {
        //Given
        TestTable testTable = new TestTable("test");
        this.testEntityManager.persist(testTable);

        //When
        List result = testRepository.findByName("test");

        //Then
        assertThat(result.get(0), is(testTable));
    }
}

- result

7:06:47: External tasks execution finished 'cleanTest test --tests org.blog.test.repository.TestRepositoryTest'.