Test Containers Specs2 Setup

DoobieQueriesSetup.scala

import doobie._
import cats.effect._
import cats.effect.IO
import doobie.specs2._
import io.chrisdavenport.testcontainersspecs2._
import org.specs2.mutable.Specification
import com.dimafeng.testcontainers.GenericContainer
import org.testcontainers.containers.wait.strategy.LogMessageWaitStrategy
import java.time.Duration
import java.time.temporal.ChronoUnit.SECONDS

class IODoobieQueriesSpec extends QueriesSpec[IO] {
  // Using this instead of IOAnalysisMatchers to avoid uninitialized field error
  override implicit val M: Effect[IO] = IO.ioConcurrentEffect
}

trait QueriesSpec[F[_]] extends Specification with Checker[F] with ForAllTestContainer {
  sequential

  // IMPORTANT: MUST BE LAZY VAL
  override lazy val container = GenericContainer(
    "christopherdavenport/postgres-db-with-role:latest",
    List(5432),
    Map(
      "POSTGRES_DB" -> dbName,
      "POSTGRES_USER" -> dbUserName,
      "POSTGRES_PASSWORD" -> dbPassword,
      "POSTGRES_ROLE" -> dbName
    ),
    waitStrategy = new LogMessageWaitStrategy()
      .withRegEx(".*database system is ready to accept connections.*\\s")
      .withTimes(2)
      .withStartupTimeout(Duration.of(60, SECONDS))
  )

  lazy val driverName = "org.postgresql.Driver"
  lazy val jdbcUrl = s"jdbc:postgresql://${container.container.getContainerIpAddress()}:${container.container.getMappedPort(5432)}/${dbName}"
  lazy val dbUserName = "dbUser"
  lazy val dbPassword = "password"
  lazy val dbName = "dbName"

  lazy val transactor = Transactor.fromDriverManager[F](
    driverName,
    jdbcUrl,
    dbUserName,
    dbPassword
  )
  
  override def afterStart : Unit =
    Migrations.makeMigrations[IO](jdbcUrl, dbUserName, dbPassword).unsafeRunSync() // My Migration Utility
    
  check("select 1".query[Int])
}