pkg/linter/test/rules/only_throw_errors_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:test_reflective_loader/test_reflective_loader.dart';

import '../rule_test_support.dart';

void main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(OnlyThrowErrorsTest);
  });
}

@reflectiveTest
class OnlyThrowErrorsTest extends LintRuleTest {
  @override
  String get lintRule => LintNames.only_throw_errors;

  test_argumentError() async {
    await assertNoDiagnostics(r'''
void f() {
  throw ArgumentError('hello');
}
''');
  }

  test_error() async {
    await assertNoDiagnostics(r'''
void f() {
  throw Error();
}
''');
  }

  test_exception() async {
    await assertNoDiagnostics(r'''
void f() {
  throw ArgumentError('hello');
}
''');
  }

  test_exceptionGeneric() async {
    await assertNoDiagnostics(r'''
void f<E extends Exception>(E error) {
  throw error;
}
''');
  }

  test_exceptionGenericUnboundedAndPromoted() async {
    await assertNoDiagnostics(r'''
void f<E>(E error) {
  if (error is Error) {
    throw error;
  }
}
''');
  }

  test_exceptionMixedIn() async {
    await assertNoDiagnostics(r'''
// @dart=2.19
class Err extends Object with Exception {}

void f() {
  throw Err();
}
''');
  }

  test_extensionTypeWrapsError() async {
    await assertNoDiagnostics(r'''
extension type E(Error e) implements Object {}
void f() {
  throw E(Error());
}
''');
  }

  test_extensionTypeWrapsException() async {
    await assertNoDiagnostics(r'''
extension type E(Exception e) implements Object {}
void f() {
  throw E(Exception());
}
''');
  }

  test_extensionTypeWrapsString() async {
    await assertDiagnosticsFromMarkup(r'''
extension type E(String s) implements Object {}
void f() {
  throw [!E('hello')!];
}
''');
  }

  test_int() async {
    await assertDiagnosticsFromMarkup(r'''
void f() {
  throw [!7!];
}
''');
  }

  test_never() async {
    await assertNoDiagnostics(r'''
void f() {
  throw e();
}

Never e() => throw Exception();
''');
  }

  test_object() async {
    await assertDiagnosticsFromMarkup(r'''
void f() {
  throw [!Object()!];
}
''');
  }

  test_string() async {
    await assertDiagnosticsFromMarkup(r'''
void f() {
  throw [!'hello'!];
}
''');
  }
}