pkg/analyzer/test/src/diagnostics/non_nullable_equals_parameter_test.dart

// Copyright (c) 2023, 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/diagnostic/diagnostic.dart' as diag;
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../dart/resolution/context_collection_resolution.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(NonNullableEqualsParameterTest);
  });
}

@reflectiveTest
class NonNullableEqualsParameterTest extends PubPackageResolutionTest {
  test_dynamic() async {
    await assertErrorsInCode(
      r'''
class C {
  @override
  bool operator ==(dynamic other) => false;
}
''',
      [error(diag.nonNullableEqualsParameter, 38, 2)],
    );
  }

  test_inheritedDynamic() async {
    await assertErrorsInCode(
      r'''
class C {
  @override
  bool operator ==(dynamic other) => false;
}
class D extends C {
  @override
  bool operator ==(other) => false;
}
''',
      [
        error(diag.nonNullableEqualsParameter, 38, 2),
        error(diag.nonNullableEqualsParameter, 116, 2),
      ],
    );
  }

  test_inheritedFromObject() async {
    await assertNoErrorsInCode(r'''
class C {
  @override
  bool operator ==(other) => false;
}
''');
  }

  test_int() async {
    await assertNoErrorsInCode(r'''
class C {
  @override
  bool operator ==(covariant int other) => false;
}
''');
  }

  test_nullableObject() async {
    await assertErrorsInCode(
      r'''
class C {
  @override
  bool operator ==(Object? other) => false;
}
''',
      [error(diag.nonNullableEqualsParameter, 38, 2)],
    );
  }

  test_object() async {
    await assertNoErrorsInCode(r'''
class C {
  @override
  bool operator ==(Object other) => false;
}
''');
  }
}