Pact-Lagom is a consumer-driven contract testing library.
Since this is a prototype, it will need to be published locally:
sbt publishLocal
Derived from the online-scala-auction repository, this test should be dropped in online-auction-scala/item-impl/src/test/scala/com/example/auction/item/impl/ItemServicePactSpec.scala:
package com.example.auction.item.impl
import java.io.File
import com.example.auction.item.api.ItemService
import com.github.erip.pact.lagom.verify.{CassandraPersistence, LagomPactSpecification}
import com.lightbend.lagom.scaladsl.server.{LagomApplicationContext, LocalServiceLocator}
class ItemServicePactSpec
extends LagomPactSpecification[ItemApplication, ItemService] with CassandraPersistence {
override def pactFile: File = new File(getClass.getResource("/pacts/pact.json").toURI)
override def appLoader: LagomApplicationContext => ItemApplication =
context => new ItemApplication(context) with LocalServiceLocator
}No contract-driven tests are complete without their contracts. A resources/pacts directory must be created in the itemImpl test directory with a single file: pact.json. An example pact can be seen below:
{
"provider": {
"name": "Item Service"
},
"consumer": {
"name": "Unused consumer"
},
"interactions": [
{
"description": "Not find an item before items have been added",
"request": {
"method": "get",
"path": "/api/item/babbcbc0-522c-4fbf-84d6-0cd5a8233208"
},
"response": {
"status": 404,
"headers": {
"Content-Type": "application/json"
}
}
}
]
}