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sdk/tests/language_2/implicit_downcast_during/assert_statement_test.dart
T
Leaf Petersen b101a7d002 Add language versions to _2 test libraries
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Leaf Petersen <leafp@google.com>
2021-04-26 17:58:57 +00:00

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631 B
Dart

// 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
void main() {
Object b = true;
assert(b); // No error
assert(b, 'should not fail'); // No error
try {
assert(false, b); // Type is ok
} on AssertionError {}
b = new Object();
try {
assert(b);
assert(false, 'Did not throw');
} on TypeError {}
try {
assert(b, 'type error should occur before assert check');
assert(false, 'Did not throw');
} on TypeError {}
}