Test EntityManager with Junit5 Kotlin - spring-boot

Question

I am trying to introduce to Spring JPA and I have difficulties running up my tests.
My gradle.build.kts looks like the following
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
plugins {
id("org.springframework.boot") version "2.4.0"
id("io.spring.dependency-management") version "1.0.10.RELEASE"
kotlin("jvm") version "1.4.10"
kotlin("plugin.spring") version "1.4.10"
kotlin("plugin.jpa") version "1.4.10"
}
group = "com.pluralsight"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_1_8
repositories {
mavenCentral()
jcenter()
google()
}
dependencies {
implementation("org.springframework.boot:spring-boot-starter-data-jpa")
implementation("org.jetbrains.kotlin:kotlin-reflect")
implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
runtimeOnly("com.h2database:h2")
testImplementation(platform("org.junit:junit-bom:5.7.0"))
testImplementation("org.junit.jupiter:junit-jupiter")
}
tasks.withType<KotlinCompile> {
kotlinOptions {
freeCompilerArgs = listOf("-Xjsr305=strict")
jvmTarget = "1.8"
}
}
tasks.withType<Test> {
useJUnitPlatform()
}
I am using Junit5 for my test framework. And what first I need to test is that my Flight Entity is created correctly. I am not using #SpringRunner since we are on Junit5 so I do the following:
package com.pluralsight.springdataoverview
import com.pluralsight.springdataoverview.entity.Flight
import org.junit.jupiter.api.Assertions
import org.junit.jupiter.api.Test
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest
import org.springframework.boot.test.context.SpringBootTest
import java.time.LocalDateTime
import javax.persistence.EntityManager
#SpringBootTest
#DataJpaTest
class SpringDataOverviewApplicationTests {
#Autowired
private val entityManager: EntityManager? = null
#Test
fun verifyFlighTCanBeSaved() {
var flight = Flight()
flight.origin = "London"
flight.destination = "New York"
flight.scheduledAt = LocalDateTime.parse("2011-12-13T12:12:00")
entityManager!!.persist(flight)
val flights = entityManager
.createQuery("SELECT f FROM Flight f", Flight::class.java)
.resultList
Assertions.assertEquals(flights.first(), flight)
}
}
And I have the following in red
What dependency I am missing ?

Answer 1

You have multiple declarations of configuration (that's what your error message is saying).
It's because you are using #SpringBootTest and #DataJpaTest in the same configuration class i.e SpringDataOverviewApplicationTests.
Use either of it and it should be fine.