diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/junit/scala/collection/IteratorTest.scala | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/junit/scala/collection/IteratorTest.scala b/test/junit/scala/collection/IteratorTest.scala index b0639ef365..4df29e36c0 100644 --- a/test/junit/scala/collection/IteratorTest.scala +++ b/test/junit/scala/collection/IteratorTest.scala @@ -186,4 +186,32 @@ class IteratorTest { assertEquals(1, y.next) assertFalse(x.hasNext) // was true, after advancing underlying iterator } + // SI-9623 + @Test def noExcessiveHasNextInJoinIterator: Unit = { + var counter = 0 + val exp = List(1,2,3,1,2,3) + def it: Iterator[Int] = new Iterator[Int] { + val parent = List(1,2,3).iterator + def next(): Int = parent.next + def hasNext: Boolean = { counter += 1; parent.hasNext } + } + // Iterate separately + val res = new mutable.ArrayBuffer[Int] + it.foreach(res += _) + it.foreach(res += _) + assertSameElements(exp, res) + assertEquals(8, counter) + // JoinIterator + counter = 0 + res.clear + (it ++ it).foreach(res += _) + assertSameElements(exp, res) + assertEquals(8, counter) // was 17 + // ConcatIterator + counter = 0 + res.clear + (Iterator.empty ++ it ++ it).foreach(res += _) + assertSameElements(exp, res) + assertEquals(8, counter) // was 14 + } } |