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//############################################################################
// Lists
//############################################################################
// $Id$
//############################################################################
import java.lang.System; // to avoid name clash with .NET's library
object Test {
val xs1 = List(1, 2, 3);
val xs2 = List('a', 'b');
val xs3 = List(List(1, 2), List(4, 5));
val xs4 = List(2, 4, 6, 8);
val xs5 = List(List(3, 4), List(3), List(4, 5));
def check_count: int = {
val n1 = xs1 count { e => e % 2 != 0 };
val n2 = xs4 count { e => e < 5 };
n1 + n2
}
def check_diff: int = {
val ys1 = xs1 diff xs4;
val ys2 = xs3 diff xs5;
ys1.length + ys2.length
}
def check_exists: boolean = {
val b1 = xs1 exists { e => e % 2 == 0 };
val b2 = xs4 exists { e => e == 5 };
b1 & b2
}
def check_filter: int = {
val ys1 = xs1 filter { e => e % 2 == 0 };
val ys2 = xs4 filter { e => e < 5 };
ys1.length + ys2.length
}
def check_foldLeft: int = {
val n1 = xs1.foldLeft(0)((e1, e2) => e1 + e2);
val ys1 = xs4.foldLeft(List[Int]())((e1, e2) => e2 :: e1);
n1 + ys1.length
}
def check_forall: boolean = {
val b1 = xs1 forall { e => e < 10};
val b2 = xs4 forall { e => e % 2 == 0 };
b1 & b2
}
def check_intersect: int = {
val ys1 = xs1 intersect xs4;
val ys2 = xs3 intersect xs5;
ys1.length + ys2.length
}
def check_remove: int = {
val ys1 = xs1 remove { e => e % 2 != 0 };
val ys2 = xs4 remove { e => e < 5 };
ys1.length + ys2.length
}
def check_union: int = {
val ys1 = xs1 union xs4;
val ys2 = xs3 union xs5;
ys1.length + ys2.length
}
def check_zip: int = {
val ys1 = xs1 zip xs2;
val ys2 = xs1 zip xs3;
ys1.length + ys2.length
}
def check_zipAll: int = {
val ys1 = xs1.zipAll(xs2, 0, '_');
val ys2 = xs1.zipAll(xs3, 0, List(-1));
ys1.length + ys2.length
}
def check_success[A](name: String, closure: => A, expected: A): Unit = {
System.out.print("test " + name);
try {
val actual: A = closure;
if (actual == expected)
System.out.print(" was successful");
else
System.out.print(" failed: expected "+ expected +", found "+ actual);
}
catch {
case exception: Throwable => {
System.out.print(" raised exception " + exception);
}
}
System.out.println();
}
def main(args: Array[String]): Unit = {
check_success("check_count", check_count, 4);
check_success("check_diff", check_diff, 3);
check_success("check_exists", check_exists, false);
check_success("check_filter", check_filter, 3);
check_success("check_foldLeft", check_foldLeft, 10);
check_success("check_forall", check_forall, true);
check_success("check_intersect", check_intersect, 2);
check_success("check_remove", check_remove, 3);
check_success("check_union", check_union, 10);
check_success("check_zip", check_zip, 4);
check_success("check_zipAll", check_zipAll, 6);
System.out.println();
}
}
//############################################################################
|
