blob: 3b1faa465679dcf0bf9856ed8f1f7f872ff0472a [file] [log] [blame]
// TODO(multitest): This was automatically migrated from a multitest and may
// contain strange or dead code.
// @dart = 2.9
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// Simple test program for sync* generator functions.
// VMOptions=--optimization_counter_threshold=10
import "package:expect/expect.dart";
sum10() sync* {
var s = 0;
for (var k = 1; k <= 10; k++) {
s += k;
yield s;
}
}
class Range {
int start, end;
Range(this.start, this.end);
elements() sync* {
var e = start;
while (e <= end) yield e++;
}
get yield sync* {
// yield is a legal member name here.
var e = start;
while (e <= end) yield e++;
}
}
get sync sync* {
// sync is a legal identifier.
yield "sync";
}
einsZwei() sync* {
yield 1;
yield* [2, 3];
yield* [];
yield 5;
yield [6];
}
dreiVier() sync* {
// Throws type error: yielded object is not an iterable.
}
main() {
for (int i = 0; i < 10; i++) {
var sums = sum10();
print(sums);
Expect.isTrue(sums is Iterable);
Expect.equals(10, sums.length);
Expect.equals(1, sums.first);
Expect.equals(55, sums.last);
var q = "";
for (var n in sums.take(3)) {
q += "$n ";
}
Expect.equals("1 3 6 ", q);
var r = new Range(10, 12);
var elems1 = r.elements();
print(elems1);
var elems2 = r.yield;
print(elems2);
// Walk the elements of each iterable and compare them.
var i = elems1.iterator;
Expect.isTrue(i is Iterator);
elems2.forEach((e) {
Expect.isTrue(i.moveNext());
Expect.equals(e, i.current);
});
print(sync);
Expect.equals("sync", sync.single);
print(einsZwei());
Expect.equals("(1, 2, 3, 5, [6])", einsZwei().toString());
}
}