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

// 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:analyzer/src/generated/parser.dart' show ParserErrorCode;
import 'package:test_reflective_loader/test_reflective_loader.dart';

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

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

@reflectiveTest
class DefaultValueInFunctionTypeTest extends PubPackageResolutionTest {
  test_new_named() async {
    await assertErrorsInCode('''
typedef F = int Function({Map<String, String> m = const {}});
''', [
      error(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 48, 1),
    ]);
  }

  test_new_named_ambiguous() async {
    // Test that the strong checker does not crash when given an ambiguous set
    // or map literal.
    await assertErrorsInCode('''
typedef F = int Function({Object m = const {1, 2: 3}});
''', [
      error(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 35, 1),
      error(CompileTimeErrorCode.AMBIGUOUS_SET_OR_MAP_LITERAL_BOTH, 37, 15),
    ]);
  }

  test_new_positional() async {
    await assertErrorsInCode('''
typedef F = int Function([Map<String, String> m = const {}]);
''', [
      error(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 48, 1),
    ]);
  }

  test_old_named() async {
    await assertErrorsInCode('''
typedef F([x = 0]);
''', [
      error(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 13, 1),
    ]);
  }

  test_old_positional() async {
    await assertErrorsInCode('''
typedef F([x = 0]);
''', [
      error(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 13, 1),
    ]);
  }

  test_typeArgument_ofInstanceCreation() async {
    await assertErrorsInCode('''
class A<T> {}

void f() {
  A<void Function([int x = 42])>();
}
''', [
      error(ParserErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE, 51, 1),
    ]);
    // The expression is resolved, even if it is invalid.
    assertType(findNode.integerLiteral('42'), 'int');
  }
}