Setting up an integration test with r2dbc - spring

Question

import com.expediagroup.api.database.OrderDomain
import com.expediagroup.api.database.OrderDomainRepository
import io.r2dbc.pool.ConnectionPool
import io.r2dbc.spi.ConnectionFactory
import org.assertj.core.api.Assertions.assertThat
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.TestInstance
import org.springframework.beans.factory.annotation.Autowired
import java.io.IOException
import java.sql.Date
import java.util.Arrays
import java.util.function.Consumer
import org.junit.jupiter.api.extension.ExtendWith
import org.springframework.r2dbc.core.DatabaseClient
import org.springframework.test.context.junit.jupiter.SpringExtension
import reactor.test.StepVerifier
import reactor.core.publisher.Hooks
import org.junit.jupiter.api.BeforeEach
import org.springframework.boot.test.autoconfigure.data.r2dbc.DataR2dbcTest
#ExtendWith(SpringExtension::class)
#TestInstance(TestInstance.Lifecycle.PER_METHOD)
#DataR2dbcTest
class R2dbcTemplateIT {
#Autowired
var orderDomain: OrderDomainRepository? = null
#Autowired
var database: DatabaseClient? = null
#ClassRule
var mysql: MySQLContainer<?> = MySQLContainer<>("mysql:5.5")
.withDatabaseName("test")
.withUsername("test")
.withPassword("test")
#BeforeEach
fun setUp() {
Hooks.onOperatorDebug()
mysql.start()
val statements: List<String> = Arrays.asList( //
"DROP TABLE IF EXISTS customer;",
"CREATE TABLE customer ( id SERIAL PRIMARY KEY, firstname VARCHAR(100) NOT NULL, lastname VARCHAR(100) NOT NULL);"
)
statements.forEach(Consumer { it: String? ->
database!!.sql(it!!) //
.fetch() //
.rowsUpdated() //
.`as`(StepVerifier::create)
.expectNextCount(1) //
.verifyComplete()
})
}
#Test
#Throws(IOException::class)
fun generatesIdOnInsert() {
val domainMetadata = customer(1L, "John", "Smith")
orderDomain?.save(domainMetadata) //
?.`as`(StepVerifier::create) //
?.assertNext { actual ->
assertThat(domainMetadata.id).isNull() // immutable before save
assertThat(actual.id).isNotNull() // after save
}?.verifyComplete()
}
}
I am trying to run an integration test on R2DBC using R2DBCRepositories to test our a few things. I was wondering I have this except for the fact of not having any local database running hence
Does anyone know have recommendation on setting up the DB within this test as well?

Answer 1

Turns out it is an issue with Kotlin not liking the way it was set up in Java.
https://github.com/testcontainers/testcontainers-java/issues/318