diff options
Diffstat (limited to 'test-nsc/files/run/iterators.scala')
-rw-r--r-- | test-nsc/files/run/iterators.scala | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/test-nsc/files/run/iterators.scala b/test-nsc/files/run/iterators.scala new file mode 100644 index 0000000000..7d1e44a0df --- /dev/null +++ b/test-nsc/files/run/iterators.scala @@ -0,0 +1,79 @@ +//############################################################################ +// Iterators +//############################################################################ +// $Id$ + +//############################################################################ + +object Test { + + def check_from: Int = { + val it1 = Iterator.from(-1); + val it2 = Iterator.from(0, -1); + it1.next + it2.next + } + + def check_range: Int = { + val xs1 = Iterator.range(0, 10, 2) toList; + val xs2 = Iterator.range(0, 10, -2) toList; + val xs3 = Iterator.range(10, 0, -2) toList; + val xs4 = Iterator.range(10, 0, 2) toList; + xs1.length + xs2.length + xs3.length + xs4.length + } + + def check_take: Int = { + val it1 = Iterator.from(0); + val xs1 = it1 take 10 toList; + xs1.length + } + + def check_drop: Int = { + val it1 = Iterator.from(0); + val it2 = it1 map { x => 2 * x }; + val n1 = it1 drop 2 next; + val n2 = it2 drop 2 next; + n1 + n2 + } + + def check_foreach: Int = { + val it1 = Iterator.from(0) take 20; + var n = 0; + it1 foreach { x => n = n + x } + n + } + + def check_forall: Int = { + val it1 = Iterator.from(0); + val it2 = Iterator.from(1); + 0 + } + + def check_success[A](name: String, closure: => A, expected: A): Unit = { + Console.print("test " + name); + try { + val actual: A = closure; + if (actual == expected) + Console.print(" was successful"); + else + Console.print(" failed: expected "+ expected +", found "+ actual); + } + catch { + case exception: Throwable => { + Console.print(" raised exception " + exception); + } + } + Console.println; + } + + def main(args: Array[String]): Unit = { + check_success("check_from", check_from, -1); + check_success("check_range", check_range, 10); + check_success("check_take", check_take, 10); + check_success("check_drop", check_drop, 12); + check_success("check_foreach", check_foreach, 190); + check_success("check_forall", check_forall, 0); + Console.println; + } +} + +//############################################################################ |