Files
sdk/tests/language/sync_star/yield_test.dart
T
Robert Nystrom 5bb9e922db Opt multitests out of formatting in language/.
The new formatter supports opting a region of code out from being
formatted. I'm applying this marker to all of the multitests since
those tests are often very sensitive to formatting and easily broken.
This way, anyone touching a multitest (including me when I reformat
the tests) doesn't have to remember to not run the formatter on it.

Unfortunately, this doesn't opt out 100# of the multitests. There are a
handful of multitests that also contain "@dart=" comments and are thus
formatted using the old style where the "// dart format off" marker has
no effect. For those, we'll have to still be careful to not accidentally
format them.

Change-Id: I257d0ee1eb44eee57047be06b8520f0ccc7b56d3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/396162
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>
2024-11-21 10:49:44 +00:00

110 lines
2.7 KiB
Dart

// 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.
// Formatting can break multitests, so don't format them.
// dart format off
// TODO(jmesserly): this is a copy of the language test of the same name,
// we can remove this copy when we're running against those tests.
import "package:expect/expect.dart";
Iterable<int> foo1() sync* {
yield 1;
}
Iterable<int?> foo2(p) sync* {
bool t = false;
yield null;
while (true) {
a:
for (int i = 0; i < p; i++) {
if (!t) {
for (int j = 0; j < 3; j++) {
yield -1;
t = true;
break a;
}
}
yield i;
}
}
}
// p is copied to all Iterators from the Iterable returned by foo3.
// Also each iterator will have its own i.
Iterable<int> foo3(int p) sync* {
int i = 0;
i++;
p++;
yield p + i;
}
void testCapturingInSyncStar() {
int localL0 = 0;
nested1(int paramL1) sync* {
int localL1 = 0;
localL0 += 10;
paramL1 += 100;
nested2(int paramL2) sync* {
int localL2 = 0;
localL0 += 1000;
paramL1 += 10000;
localL1 += 100000;
paramL2 += 1000000;
localL2 += 10000000;
yield localL0 + paramL1 + localL1 + paramL2 + localL2;
}
yield nested2(0);
}
Iterable t1 = nested1(0);
Iterator it11 = t1.iterator;
Iterator it12 = t1.iterator;
it11.moveNext();
it12.moveNext();
Iterable t2 = it11.current;
Iterable t3 = it12.current;
Iterator it21 = t2.iterator;
Iterator it22 = t2.iterator;
Iterator it31 = t3.iterator;
Iterator it32 = t3.iterator;
it21.moveNext();
it22.moveNext();
it31.moveNext();
it32.moveNext();
Expect.equals(11111120, it21.current);
Expect.equals(11222120, it22.current);
Expect.equals(11113120, it31.current);
Expect.equals(11224120, it32.current);
}
main() {
Expect.listEquals([1], foo1().toList());
Expect.listEquals(
[null, -1, 0, 1, 2, 3, 0, 1, 2, 3], foo2(4).take(10).toList());
Iterable t = foo3(0);
Iterator it1 = t.iterator;
Iterator it2 = t.iterator; //# copyParameters: ok
it1.moveNext();
it2.moveNext(); //# copyParameters: continued
Expect.equals(2, it1.current);
// TODO(sigurdm): Check up on the spec here.
Expect.equals(2, it2.current); // //# copyParameters: continued
Expect.isFalse(it1.moveNext());
// Test that two `moveNext()` calls are fine.
Expect.isFalse(it1.moveNext());
Expect.isFalse(it2.moveNext()); //# copyParameters: continued
Expect.isFalse(it2.moveNext()); //# copyParameters: continued
testCapturingInSyncStar(); //# capturing: ok
}