blob: 279fa6604d86da9dc1e5ef11ecff1574bf8925a9 [file] [log] [blame]
// Copyright (c) 2019, 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.
import 'package:analyzer/src/error/codes.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';
import '../dart/resolution/context_collection_resolution.dart';
main() {
defineReflectiveSuite(() {
defineReflectiveTests(DeadNullAwareExpressionTest);
});
}
@reflectiveTest
class DeadNullAwareExpressionTest extends PubPackageResolutionTest {
test_assignCompound_map() async {
await assertNoErrorsInCode(r'''
class MyMap<K, V> {
V? operator[](K key) => null;
void operator[]=(K key, V value) {}
}
f(MyMap<int, int> map) {
map[0] ??= 0;
}
''');
}
test_assignCompound_nonNullable() async {
await assertErrorsInCode(r'''
f(int x) {
x ??= 0;
}
''', [
error(StaticWarningCode.DEAD_NULL_AWARE_EXPRESSION, 19, 1),
]);
}
test_assignCompound_nullable() async {
await assertNoErrorsInCode(r'''
f(int? x) {
x ??= 0;
}
''');
}
test_binary_nonNullable() async {
await assertErrorsInCode(r'''
f(int x) {
x ?? 0;
}
''', [
error(StaticWarningCode.DEAD_NULL_AWARE_EXPRESSION, 18, 1),
]);
}
test_binary_nullable() async {
await assertNoErrorsInCode(r'''
f(int? x) {
x ?? 0;
}
''');
}
test_binary_nullType() async {
await assertNoErrorsInCode(r'''
f(Null x) {
x ?? 1;
}
''');
}
}