Toy/scripts/test/functions.toy

//test function return
fn testFourtyTwo() {
	return 42;
}

assert testFourtyTwo() == 42, "function returns failed";


//test function parameters
fn identity(x) {
	return x;
}

assert identity("hello world") == "hello world", "identity function failed";


//test closures
fn make() {
	var counter = 0;

	fn count() {
		return ++counter;
	}

	return count;
}

var tally = make();

assert tally() == 1 && tally() == 2, "Closures failed";


//test closures self-capture
fn capture(count: int) {
	if (count > 5) {
		return count;
	}

	return capture(count + 1);
}

assert capture(0) == 6, "Self capture failed";


//test expressions as arguments
fn argFn() {
	return 42;
}

fn outerFn(val) {
	assert val == 42, "expression as argument failed";
}

outerFn(argFn());


//test extra parameters
fn extra(one, two, ...rest) {
	assert rest == ["three", "four", "five", "six", "seven"], "rest parameters failed";
}

extra("one", "two", "three", "four", "five", "six", "seven");




print "All good";