1 files changed, 103 insertions, 0 deletions
diff --git a/compiler/test/dotty/tools/vulpix/SummaryReport.scala b/compiler/test/dotty/tools/vulpix/SummaryReport.scala
new file mode 100644
index 000000000..53b0942ce
--- /dev/null
+++ b/compiler/test/dotty/tools/vulpix/SummaryReport.scala
@@ -0,0 +1,103 @@
+package dotty
+package tools
+package vulpix
+
+import scala.collection.mutable
+import dotc.reporting.TestReporter
+
+trait SummaryReporting {
+  def reportFailed(): Unit
+  def reportPassed(): Unit
+  def addFailedTest(msg: String): Unit
+  def addReproduceInstruction(instr: String): Unit
+  def addStartingMessage(msg: String): Unit
+  def addCleanup(f: () => Unit): Unit
+  def echoSummary(): Unit
+}
+
+final class NoSummaryReport extends SummaryReporting {
+  def reportFailed(): Unit = ()
+  def reportPassed(): Unit = ()
+  def addFailedTest(msg: String): Unit = ()
+  def addReproduceInstruction(instr: String): Unit = ()
+  def addStartingMessage(msg: String): Unit = ()
+  def addCleanup(f: () => Unit): Unit = ()
+  def echoSummary(): Unit = ()
+}
+
+final class SummaryReport extends SummaryReporting {
+
+  private val startingMessages = mutable.ArrayBuffer.empty[String]
+  private val failedTests = mutable.ArrayBuffer.empty[String]
+  private val reproduceInstructions = mutable.ArrayBuffer.empty[String]
+  private val cleanUps = mutable.ArrayBuffer.empty[() => Unit]
+
+  private[this] var passed = 0
+  private[this] var failed = 0
+
+  def reportFailed(): Unit =
+    failed += 1
+
+  def reportPassed(): Unit =
+    passed += 1
+
+  def addFailedTest(msg: String): Unit =
+    failedTests.append(msg)
+
+  def addReproduceInstruction(instr: String): Unit =
+    reproduceInstructions.append(instr)
+
+  def addStartingMessage(msg: String): Unit =
+    startingMessages.append(msg)
+
+  def addCleanup(f: () => Unit): Unit =
+    cleanUps.append(f)
+
+  /** Both echoes the summary to stdout and prints to file */
+  def echoSummary(): Unit = {
+    import SummaryReport._
+
+    val rep = new StringBuilder
+    rep.append(
+      s"""|
+          |================================================================================
+          |Test Report
+          |================================================================================
+          |
+          |$passed passed, $failed failed, ${passed + failed} total
+          |""".stripMargin
+    )
+
+    startingMessages.foreach(rep.append)
+
+    failedTests.map(x => "    " + x).foreach(rep.append)
+
+    // If we're compiling locally, we don't need instructions on how to
+    // reproduce failures
+    if (isInteractive) {
+      println(rep.toString)
+      if (failed > 0) println {
+        """|
+           |----------------------------------------------------------
+           |Note: reproduction instructed have been dumped to log file
+           |----------------------------------------------------------""".stripMargin
+      }
+    }
+
+    rep += '\n'
+
+    reproduceInstructions.foreach(rep.append)
+
+    // If we're on the CI, we want everything
+    if (!isInteractive) println(rep.toString)
+
+    TestReporter.writeToLog(rep.toString)
+
+    // Perform cleanup callback:
+    if (cleanUps.nonEmpty) cleanUps.foreach(_.apply())
+  }
+}
+
+object SummaryReport {
+  val isInteractive = Properties.testsInteractive && !Properties.isRunByDrone
+}