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-rw-r--r--test/files/run/iterators.scala79
1 files changed, 79 insertions, 0 deletions
diff --git a/test/files/run/iterators.scala b/test/files/run/iterators.scala
new file mode 100644
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+++ b/test/files/run/iterators.scala
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+//############################################################################
+// 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;
+ }
+}
+
+//############################################################################