From ed9bbb01a5c46db5526ba289bff36c0cf52c371b Mon Sep 17 00:00:00 2001
From: Joseph Bradley <joseph.kurata.bradley@gmail.com>
Date: Tue, 8 May 2018 13:23:22 -0700
Subject: [PATCH] fix bug with ML additional method tests (#142)

#139 introduced a bug which made most ML tests fail with mllib-small.yaml. This fixes those tests.
---
 .../databricks/spark/sql/perf/mllib/BenchmarkAlgorithm.scala    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/scala/com/databricks/spark/sql/perf/mllib/BenchmarkAlgorithm.scala b/src/main/scala/com/databricks/spark/sql/perf/mllib/BenchmarkAlgorithm.scala
index dd48b9d..95b7478 100644
--- a/src/main/scala/com/databricks/spark/sql/perf/mllib/BenchmarkAlgorithm.scala
+++ b/src/main/scala/com/databricks/spark/sql/perf/mllib/BenchmarkAlgorithm.scala
@@ -53,7 +53,7 @@ trait BenchmarkAlgorithm extends Logging {
    */
   def testAdditionalMethods(
       ctx: MLBenchContext,
-      transformer: Transformer): Map[String, () => _] = null
+      transformer: Transformer): Map[String, () => _] = Map.empty[String, () => _]
 }
 
 /**