Reinstate "InvokerConcurrencyTest"

src/test/scala/scoverage/InvokerConcurrencyTest.scala

@@ -0,0 +1,53 @@
+package scoverage
+
+import org.scalatest.FunSuite
+import org.scalatest.BeforeAndAfter
+import java.io.File
+import scala.concurrent._
+import scala.concurrent.duration._
+import ExecutionContext.Implicits.global
+import scala.collection.breakOut
+
+/**
+ * Verify that [[Invoker.invoked()]] is thread-safe
+ */
+class InvokerConcurrencyTest extends FunSuite with BeforeAndAfter {
+
+ val measurementDir = new File("invoker-test.measurement")
+
+ before {
+ deleteMeasurementFiles()
+ measurementDir.mkdirs()
+ }
+
+ test("calling Invoker.invoked on multiple threads does not corrupt the measurement file") {
+
+ val testIds: Set[Int] = (1 to 1000).toSet
+
+ // Create 1k "invoked" calls on the common thread pool, to stress test
+ // the method
+ val futures: List[Future[Unit]] = testIds.map { i: Int =>
+ future {
+ Invoker.invoked(i, measurementDir.toString)
+ }
+ }(breakOut)
+
+ futures.foreach(Await.result(_, 1.second))
+
+ // Now verify that the measurement file is not corrupted by loading it
+ val measurementFiles = IOUtils.findMeasurementFiles(measurementDir)
+ val idsFromFile = IOUtils.invoked(measurementFiles).toSet
+
+ idsFromFile === testIds
+ }
+
+ after {
+ deleteMeasurementFiles()
+ measurementDir.delete()
+ }
+
+ private def deleteMeasurementFiles(): Unit = {
+ if (measurementDir.isDirectory)
+ measurementDir.listFiles().foreach(_.delete())
+ }
+}