From b54f3fd4c4d9601a5f5bfc6d4ed881a15f37a472 Mon Sep 17 00:00:00 2001
From: Christopher Vogt <oss.nsp@cvogt.org>
Date: Wed, 27 Apr 2016 09:41:55 -0400
Subject: only run tests if there are actually tests to run (useful for
 recursively running tests in nested projects)

---
 stage2/BasicBuild.scala |  4 +++-
 stage2/Lib.scala        | 28 +++++++++++++++-------------
 2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/stage2/BasicBuild.scala b/stage2/BasicBuild.scala
index b489947..65db8a4 100644
--- a/stage2/BasicBuild.scala
+++ b/stage2/BasicBuild.scala
@@ -139,7 +139,9 @@ class Build(val context: Context) extends Dependency with TriggerLoop with SbtDe
   def runClass: String = "Main"
   def run: ExitCode = lib.runMainIfFound( runClass, context.args, classLoader(context.classLoaderCache) )
 
-  def test: ExitCode = lib.test(context)
+  def test: Option[ExitCode] = {
+    lib.test(context)
+  }
 
   /*
   context.logger.composition(">"*80)
diff --git a/stage2/Lib.scala b/stage2/Lib.scala
index aa98e7c..d7456e1 100644
--- a/stage2/Lib.scala
+++ b/stage2/Lib.scala
@@ -108,19 +108,21 @@ final class Lib(logger: Logger) extends Stage1Lib(logger) with Scaffold{
     }
   }
 
-  def test( context: Context ): ExitCode = {
-    val loggers = logger.enabledLoggers.mkString(",")
-    // FIXME: this is a hack to pass logger args on to the tests.
-    // should probably have a more structured way
-    val loggerArg = if(loggers != "") Some("-Dlog="++loggers) else None
-
-    logger.lib(s"invoke testDefault( $context )")
-    val exitCode: ExitCode = loadDynamic(
-      context.copy( projectDirectory = context.projectDirectory ++ "/test", args = loggerArg.toVector ++ context.args ),
-      new Build(_) with mixins.Test
-    ).run
-    logger.lib(s"return testDefault( $context )")
-    exitCode
+  def test( context: Context ): Option[ExitCode] = {
+    if((context.projectDirectory ++ "/test").exists){
+      val loggers = logger.enabledLoggers.mkString(",")
+      // FIXME: this is a hack to pass logger args on to the tests.
+      // should probably have a more structured way
+      val loggerArg = if(loggers != "") Some("-Dlog="++loggers) else None
+
+      logger.lib(s"invoke testDefault( $context )")
+      val exitCode: ExitCode = loadDynamic(
+        context.copy( projectDirectory = context.projectDirectory ++ "/test", args = loggerArg.toVector ++ context.args ),
+        new BasicBuild(_) with mixins.Test
+      ).run.asInstanceOf[ExitCode] // FIXME
+      logger.lib(s"return testDefault( $context )")
+      Some(exitCode)
+    } else None
   }
 
   // task reflection helpers
-- 
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