blob: 723a91e273d89d2fd3ee96fa6a2a6fba402b7770 [file] [log] [blame]
// Copyright (c) 2017, 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.
// @dart = 2.9
library future_foreach_test;
import 'package:async_helper/async_helper.dart';
import "package:expect/expect.dart";
import 'dart:async';
main() {
asyncStart();
testForeach(<int>[]);
testForeach(<int>[0]);
testForeach(<int>[0, 1, 2, 3]);
testForeachIterableThrows(
new Iterable<int>.generate(5, (i) => i < 4 ? i : throw "ERROR"),
4,
"ERROR");
testForeachFunctionThrows(new Iterable<int>.generate(5, (x) => x), 4);
asyncEnd();
}
void testForeach(Iterable<int> elements) {
for (var delay in [0, 1, 2]) {
asyncStart();
int length = elements.length;
int count = 0;
int nesting = 0;
Future.forEach<int>(elements, (int value) {
Expect.isTrue(nesting == 0, "overlapping calls detected");
if (delay == 0) return "something-$delay";
nesting++;
var future;
if (delay == 1) {
future = new Future(() => null);
} else {
future = new Future.microtask(() => null);
}
return future.then<String>((_) {
Expect.equals(1, nesting);
nesting--;
return "something-$delay";
});
}).then((_) {
asyncEnd();
}).catchError((e) {
Expect.fail("Throws: $e");
});
}
}
void testForeachIterableThrows(Iterable<int> elements, n, error) {
for (var delay in [0, 1, 2]) {
asyncStart();
int count = 0;
Future.forEach<int>(elements, (_) {
count++;
Expect.isTrue(n >= 0);
switch (delay) {
case 1:
return new Future<String>(() {});
case 2:
return new Future<String>.microtask(() {});
}
}).then((_) {
Expect.fail("Did not throw");
}, onError: (e) {
Expect.equals(n, count);
Expect.equals(error, e);
asyncEnd();
});
}
}
void testForeachFunctionThrows(Iterable<int> elements, n) {
for (var delay in [0, 1, 2]) {
asyncStart();
Future.forEach<int>(elements, (v) {
if (v == n) {
switch (delay) {
case 0:
throw "ERROR";
case 1:
return new Future<String>(() {
throw "ERROR";
});
case 2:
return new Future<String>.microtask(() {
throw "ERROR";
});
}
}
switch (delay) {
case 1:
return new Future(() {});
case 2:
return new Future.microtask(() {});
}
}).then((_) {
Expect.fail("Did not throw");
}, onError: (e) {
Expect.equals("ERROR", e);
asyncEnd();
});
}
}