Added a test to make sure distinct preserves or...

Added a test to make sure distinct preserves ordering. No review

2 files changed, 16 insertions, 0 deletions

diff --git a/test/files/run/distinct.check b/test/files/run/distinct.check
new file mode 100644
index 0000000000..b0883f382e
--- /dev/null
+++ b/test/files/run/distinct.check
@@ -0,0 +1 @@
+abcdefghijklmnopqrstuvwxyz
diff --git a/test/files/run/distinct.scala b/test/files/run/distinct.scala
new file mode 100644
index 0000000000..698d31f1e9
--- /dev/null
+++ b/test/files/run/distinct.scala
@@ -0,0 +1,15 @@
+/** This is a test to make sure distinct always
+ *  returns the first of any duplicated element.
+ */
+object Test {
+  val alphabet = 'a' to 'z' mkString ""
+  val alphaList = 'a' to 'z' toList
+  def shuffled = util.Random.shuffle(alphaList)
+
+  def main(args: Array[String]): Unit = {
+    val longList = alphaList ++ (1 to 9 flatMap (_ => shuffled))
+    val result = longList.distinct mkString ""
+
+    println(result)
+  }
+}