pkg/linter/test/rules/type_init_formals_test.dart

// Copyright (c) 2021, 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';

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

@reflectiveTest
class TypeInitFormalsTest extends LintRuleTest {
  @override
  String get lintRule => 'type_init_formals';

  test_extraPositionalArgument() async {
    await assertDiagnostics(r'''
class A {
  String? p1;
  String p2 = '';
  A.y({required String? this.p2});
}
''', [
      // No lint
      error(CompileTimeErrorCode.FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE, 49,
          24),
    ]);
  }

  test_initializingFormalForNonExistentField() async {
    await assertDiagnostics(r'''
class Invalid {
  Invalid(int this.x); // OK
}
''', [
      // No lint
      error(CompileTimeErrorCode.INITIALIZING_FORMAL_FOR_NON_EXISTENT_FIELD, 26,
          10),
    ]);
  }

  test_requiredConstructorParam_tightening() async {
    await assertNoDiagnostics(r'''
class A {
  String? s;
  A({required String this.s});
}
''');
  }

  test_requiredConstructorParam_unnecessaryNullableType() async {
    await assertDiagnostics(r'''
class A {
  String? s;
  A({required String? this.s});
}
''', [
      lint(37, 7),
    ]);
  }

  test_requiredConstructorParam_unnecessaryType() async {
    await assertDiagnostics(r'''
class A {
  String s = '';
  A({required String this.s});
}
''', [
      lint(41, 6),
    ]);
  }

  test_super() async {
    await assertDiagnostics(r'''
class A {
  String? a;
  A({this.a});
}

class B extends A {
  B({String? super.a});
}
''', [
      lint(66, 7),
    ]);
  }
}