feat(Gatlin): Spike Test

Added a spike test.

src/gatling/scala/simulations/SpikeTestSimulation.scala

@@ -0,0 +1,26 @@
+package simulations
+
+import base.BaseSimulation
+import endpoints.BoardEndpoints
+import io.gatling.core.Predef._
+
+import scala.concurrent.duration._
+
+class SpikeTestSimulation extends BaseSimulation {
+
+  private val baselineUsers    = sys.props.getOrElse("baselineUsers", "2").toInt
+  private val baselineDuration = sys.props.getOrElse("baselineDuration", "20").toInt
+  private val spikeUsers       = sys.props.getOrElse("spikeUsers", "15").toInt
+
+  setUp(
+    BoardEndpoints.all.map { endpoint =>
+      scenarioFromEndpoint(endpoint)
+        .inject(
+          constantUsersPerSec(baselineUsers).during(baselineDuration.seconds),
+          atOnceUsers(spikeUsers),
+          nothingFor(5.seconds),
+          constantUsersPerSec(baselineUsers).during(baselineDuration.seconds)
+        )
+    }: _*
+  ).protocols(httpProtocol)
+}