[WM-2555] Cromwell -> ECM contract test

pact4s/src/test/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/EcmServiceContractSpec.scala

@@ -0,0 +1,63 @@
+package org.broadinstitute.dsde.workbench.cromwell.consumer
+
+import au.com.dius.pact.consumer.dsl._
+import au.com.dius.pact.consumer.{ConsumerPactBuilder, PactTestExecutionContext}
+import au.com.dius.pact.core.model.RequestResponsePact
+import cromwell.core.TestKitSuite
+import cromwell.services.auth.GithubAuthVending.{GithubToken, TerraToken}
+import cromwell.services.auth.ecm.EcmService
+import org.scalatest.flatspec.AnyFlatSpecLike
+
+import scala.concurrent.{Await, ExecutionContextExecutor}
+import org.scalatest.matchers.should.Matchers
+import pact4s.scalatest.RequestResponsePactForger
+
+import scala.concurrent.duration.DurationInt
+
+class EcmServiceContractSpec extends TestKitSuite with AnyFlatSpecLike with Matchers with RequestResponsePactForger {
+
+  implicit val ec: ExecutionContextExecutor = system.dispatcher
+
+  /*
+    Define the folder that the pact contracts get written to upon completion of this test suite.
+   */
+  override val pactTestExecutionContext: PactTestExecutionContext =
+    new PactTestExecutionContext(
+      "./target/pacts"
+    )
+
+  val consumerPactBuilder: ConsumerPactBuilder = ConsumerPactBuilder
+    .consumer("cromwell")
+
+  val pactProvider: PactDslWithProvider = consumerPactBuilder
+    .hasPactWith("ecm")
+
+  var testUser: String = "[email protected]"
+  var testBearerToken: String = "cromwellBearerToken"
+  var testGithubToken: String = "githubToken"
+
+  var pactDslResponse: PactDslResponse = pactProvider
+    .`given`("a user is registered",
+             Map[String, String](
+               "userEmail" -> testUser,
+               "bearerToken" -> testBearerToken
+             )
+    )
+    .uponReceiving("a github token request")
+    .method("GET")
+    .path("/api/oauth/v1/github/access-token")
+    .headers(Map[String, String]("Authorization" -> s"Bearer $testBearerToken"))
+    .willRespondWith()
+    .status(200)
+    .bodyMatchingContentType("text/plain", testGithubToken)
+
+  override val pact: RequestResponsePact = pactDslResponse.toPact
+
+  it should "get a github token" in {
+    Await.result(
+      new EcmService(mockServer.getUrl)
+        .getGithubAccessToken(TerraToken(testBearerToken)),
+      10.seconds
+    ) shouldBe GithubToken(testGithubToken)
+  }
+}