Fixes #3511 by adding a custom StreamView.

1 files changed, 36 insertions, 0 deletions

diff --git a/test/files/run/t3511.scala b/test/files/run/t3511.scala
new file mode 100644
index 0000000000..30757b1a66
--- /dev/null
+++ b/test/files/run/t3511.scala
@@ -0,0 +1,36 @@
+
+
+
+import scala.collection.immutable._
+
+
+// ticket #3511
+object Test {
+
+  def main(args: Array[String]) {
+    assert(Stream.from(0).view.force.take(5) == List(0, 1, 2, 3, 4))
+
+    val s = Stream.from(0)
+    val smap = s.view.map(_ * 2).force.take(5)
+    assert(smap == List(0, 2, 4, 6, 8))
+
+    val sfilter = s.view.filter(_ % 2 == 0).force.take(5)
+    assert(sfilter == List(0, 2, 4, 6, 8))
+
+    val sflatmap = s.view.flatMap(n => List(n, n * 2)).force.take(6)
+    assert(sflatmap == List(0, 0, 1, 2, 2, 4))
+
+    val stakewhile = s.view.takeWhile(_ < 10).force
+    assert(stakewhile == List.range(0, 10))
+
+    val szip = s.view.zip(s.map(_ / 2)).force.take(5)
+    assert(szip == List((0, 0), (1, 0), (2, 1), (3, 1), (4, 2)))
+
+    val szipall = s.view.zipAll(List(0, 1, 2), 0, 0).force.take(5)
+    assert(szipall == List((0, 0), (1, 1), (2, 2), (3, 0), (4, 0)))
+
+    val spatch = s.view.patch(1, List(5, 5, 5), 5).force.take(5)
+    assert(spatch == List(0, 5, 5, 5, 6))
+  }
+
+}