1 files changed, 68 insertions, 0 deletions
diff --git a/test/junit/scala/runtime/ZippedTest.scala b/test/junit/scala/runtime/ZippedTest.scala
new file mode 100644
index 0000000000..d3ce4945aa
--- /dev/null
+++ b/test/junit/scala/runtime/ZippedTest.scala
@@ -0,0 +1,68 @@
+
+package scala.runtime
+
+import scala.language.postfixOps
+
+import org.junit.Assert._
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+/** Tests Tuple?Zipped */
+@RunWith(classOf[JUnit4])
+class ZippedTest {
+  @Test
+  def crossZipped() {
+
+    val xs1 = List.range(1, 100)
+    val xs2 = xs1.view
+    val xs3 = xs1 take 10
+    val ss1 = Stream from 1
+    val ss2 = ss1.view
+    val ss3 = ss1 take 10
+    val as1 = 1 to 100 toArray
+    val as2 = as1.view
+    val as3 = as1 take 10
+
+    def xss1 = List[Seq[Int]](xs1, xs2, xs3, ss1, ss2, ss3, as1, as2, as3)
+    def xss2 = List[Seq[Int]](xs1, xs2, xs3, ss3, as1, as2, as3)  // no infinities
+    def xss3 = List[Seq[Int]](xs2, xs3, ss3, as1) // representative sampling
+
+    for (cc1 <- xss1 ; cc2 <- xss2) {
+      val sum1 = (cc1, cc2).zipped map { case (x, y) => x + y } sum
+      val sum2 = (cc1, cc2).zipped map (_ + _) sum
+
+      assert(sum1 == sum2)
+    }
+
+    for (cc1 <- xss1 ; cc2 <- xss2 ; cc3 <- xss3) {
+      val sum1 = (cc1, cc2, cc3).zipped map { case (x, y, z) => x + y + z } sum
+      val sum2 = (cc1, cc2, cc3).zipped map (_ + _ + _) sum
+
+      assert(sum1 == sum2)
+    }
+
+    assert((ss1, ss1).zipped exists ((x, y) => true))
+    assert((ss1, ss1, ss1).zipped exists ((x, y, z) => true))
+
+    assert(!(ss1, ss2, 1 to 3).zipped.exists(_ + _ + _ > 100000))
+    assert((1 to 3, ss1, ss2).zipped.forall(_ + _ + _ > 0))
+    assert((ss1, 1 to 3, ss2).zipped.map(_ + _ + _).size == 3)
+  }
+
+  @Test
+  def test_si9379() {
+    class Boom {
+      private var i = -1
+      def inc = {
+        i += 1
+        if (i > 1000) throw new NoSuchElementException("Boom! Too many elements!")
+        i
+      }
+    }
+    val b = new Boom
+    val s = Stream.continually(b.inc)
+    // zipped.toString must allow s to short-circuit evaluation
+    assertTrue((s, s).zipped.toString contains s.toString)
+  }
+}