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//############################################################################
// Boolean Expressions
//############################################################################
class Counter {
private var n: Int = 0;
def incrThen(b: Boolean) = if (b) n += 1;
def value = n;
}
object Test1 {
var flag = false;
def flip: Boolean = { val tmp = flag; flag = !flag; tmp }
def run: Int = {
val c = new Counter;
c.incrThen(flip || flip);
c.value
}
}
object Test2 {
val a = Array(false);
def run: Int = {
val c = new Counter;
c.incrThen(true && a(0));
c.incrThen(false || Nil.length > 0);
c.value
}
}
//############################################################################
// Test code
object Test {
def check_success(name: String, closure: => Int, expected: Int): Unit = {
Console.print("test " + name);
try {
val actual: Int = 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("Test1", Test1.run, 1);
check_success("Test2", Test2.run, 0);
Console.println;
}
}
//############################################################################
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