pkg/analyzer/test/src/diagnostics/recursive_compile_time_constant_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:test_reflective_loader/test_reflective_loader.dart';

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

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

@reflectiveTest
class RecursiveCompileTimeConstantTest extends PubPackageResolutionTest {
  test_cycle() async {
    await assertErrorsInCode(r'''
const x = y + 1;
const y = x + 1;
''', [
      error(CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT, 6, 1),
      error(CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT, 23, 1),
    ]);
  }

  test_field() async {
    await assertErrorsInCode(r'''
class A {
  const A();
  final m = const A();
}
''', [
      error(CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT, 31, 1),
    ]);
  }

  test_fromMapLiteral() async {
    newFile(
      '$testPackageLibPath/constants.dart',
      content: r'''
const int x = y;
const int y = x;
''',
    );
    // No errors, because the cycle is not in this source.
    await assertNoErrorsInCode(r'''
import 'constants.dart';
final z = {x: 0, y: 1};
''');
  }

  test_initializer_after_toplevel_var() async {
    await assertErrorsInCode('''
const y = const C();
class C {
  const C() : x = y;
  final x;
}
''', [
      error(CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT, 6, 1),
    ]);
  }

  test_singleVariable() async {
    await assertErrorsInCode(r'''
const x = x;
''', [
      error(CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT, 6, 1),
    ]);
  }

  test_singleVariable_fromConstList() async {
    await assertErrorsInCode(r'''
const elems = const [
  const [
    1, elems, 3,
  ],
];
''', [
      error(CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT, 6, 5),
    ]);
  }
}