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author | Martijn Hoekstra <martijnhoekstra@gmail.com> | 2016-05-16 18:52:06 +0200 |
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committer | Martijn Hoekstra <martijnhoekstra@gmail.com> | 2016-05-21 09:48:24 +0200 |
commit | c89c36597f922fe29cbb3cec8095611f86ba4976 (patch) | |
tree | eeaef6bee4da5441da999727ff5ba97c4e2aa394 /test/junit/scala/collection | |
parent | b3f8332cf399cd15067c879c8297c25598045883 (diff) | |
download | scala-c89c36597f922fe29cbb3cec8095611f86ba4976.tar.gz scala-c89c36597f922fe29cbb3cec8095611f86ba4976.tar.bz2 scala-c89c36597f922fe29cbb3cec8095611f86ba4976.zip |
SI-9766 - allow ++ on empty ConcatIterator
Diffstat (limited to 'test/junit/scala/collection')
-rw-r--r-- | test/junit/scala/collection/IteratorTest.scala | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/junit/scala/collection/IteratorTest.scala b/test/junit/scala/collection/IteratorTest.scala index 329c85127a..d980cadeb3 100644 --- a/test/junit/scala/collection/IteratorTest.scala +++ b/test/junit/scala/collection/IteratorTest.scala @@ -192,4 +192,22 @@ class IteratorTest { assertSameElements(exp, res) assertEquals(8, counter) // was 14 } + + // SI-9766 + @Test def exhaustedConcatIteratorConcat: Unit = { + def consume[A](i: Iterator[A]) = { + while(i.hasNext) i.next() + } + val joiniter = Iterator.empty ++ Seq(1, 2, 3) + assertTrue(joiniter.hasNext) + consume(joiniter) + val concatiter = joiniter ++ Seq(4, 5, 6) + assertTrue(concatiter.hasNext) + consume(concatiter) + assertFalse(concatiter.hasNext) + val concatFromEmpty = concatiter ++ Seq(7, 8, 9) + assertTrue(concatFromEmpty.hasNext) + consume(concatFromEmpty) + assertFalse(concatFromEmpty.hasNext) + } } |