Sharing resources

Resources can be shared across tests, this is done by implementing a method that returns cats.effect.Resource.

This is also how you would translate the traditional beforeAll and afterAll methods, as the resources are acquired before tests are run, and cleaned-up after they finish.

import weaver._
import cats.effect._

// Using http4s
import org.http4s.client.blaze._
import org.http4s.client._
import scala.concurrent.ExecutionContext.global

object HttpSuite extends IOSuite {

  // Sharing a single http client across all tests
  override type Res = Client[IO]
  override def sharedResource : Resource[IO, Res] =
    BlazeClientBuilder[IO](global).resource

  // The test receives the shared client as an argument
  test("Good requests lead to good results") { httpClient =>
    for {
      statusCode <- httpClient.get("https://httpbin.org/get"){
        response => IO.pure(response.status.code)
      }
    } yield expect(statusCode == 200)
  }

  test("Bad requests lead to bad results") { httpClient =>
    for {
      statusCode <- httpClient.get("https://httpbin.org/oops"){
        response => IO.pure(response.status.code)
      }
    } yield expect(statusCode == 404)
  }


}