Srujan Gaddam
6929718456
Closes https://github.com/dart-lang/sdk/issues/44602 Creates an exception to signal a `null`/`undefined` value when a converted promise is rejected with `null`/`undefined`. Change-Id: Ic7f14e23c6c1d51d6dbcc5831ffa8491418a4267 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192046 Commit-Queue: Srujan Gaddam <srujzs@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
65 lines
1.5 KiB
Dart
65 lines
1.5 KiB
Dart
@JS()
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library promise_reject_null_test;
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import 'package:js/js.dart';
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import 'package:js/js_util.dart' show promiseToFuture, NullRejectionException;
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import 'package:expect/minitest.dart';
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@JS()
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external void eval(String s);
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@JS('Promise.reject')
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external dynamic getRejectedPromise(v);
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@JS()
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external void reject(v);
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@JS()
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external dynamic getNewPromise();
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void main() async {
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eval('''
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self.getNewPromise = function () {
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return new Promise(function (_, reject) {
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self.reject = reject;
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});
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};
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''');
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// Rejected promise with a `null` value should trigger a
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// `NullRejectionException`.
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await promiseToFuture(getRejectedPromise(null)).then((_) {
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fail("Expected promise to reject and not fulfill.");
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}).catchError((e) {
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expect(e is NullRejectionException, true);
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expect(e.isUndefined, false);
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});
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// Similar to the above, except we reject using JS interop.
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var future = promiseToFuture(getNewPromise()).then((_) {
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fail("Expected promise to reject and not fulfill.");
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}).catchError((e) {
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expect(e is NullRejectionException, true);
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expect(e.isUndefined, false);
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});
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reject(null);
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await future;
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// It's also possible to reject with `undefined`. Make sure that the exception
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// correctly flags that case.
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future = promiseToFuture(getNewPromise()).then((_) {
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fail("Expected promise to reject and not fulfill.");
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}).catchError((e) {
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expect(e is NullRejectionException, true);
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expect(e.isUndefined, true);
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});
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eval('''
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self.reject(undefined);
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''');
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await future;
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}
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