pkg/analyzer/test/src/diagnostics/duplicate_pattern_assignment_variable_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(DuplicatePatternAssignmentVariableTest);
  });
}

@reflectiveTest
class DuplicatePatternAssignmentVariableTest extends PubPackageResolutionTest {
  test_nested() async {
    await assertErrorsInCode(
      r'''
void f() {
  int a;
  (a && int(sign: a)) = 0;
  a;
}
''',
      [
        error(
          diag.duplicatePatternAssignmentVariable,
          38,
          1,
          contextMessages: [message(testFile, 23, 1)],
        ),
      ],
    );
  }

  test_record_2() async {
    await assertErrorsInCode(
      r'''
void f() {
  int a;
  (a, a) = (1, 2);
  a;
}
''',
      [
        error(
          diag.duplicatePatternAssignmentVariable,
          26,
          1,
          contextMessages: [message(testFile, 23, 1)],
        ),
      ],
    );
  }

  test_record_3() async {
    await assertErrorsInCode(
      r'''
void f() {
  int a;
  (a, a, a) = (1, 2, 3);
  a;
}
''',
      [
        error(
          diag.duplicatePatternAssignmentVariable,
          26,
          1,
          contextMessages: [message(testFile, 23, 1)],
        ),
        error(
          diag.duplicatePatternAssignmentVariable,
          29,
          1,
          contextMessages: [message(testFile, 23, 1)],
        ),
      ],
    );
  }

  test_separate() async {
    await assertNoErrorsInCode(r'''
void f() {
  int a;
  (a) = 1;
  (a) = 2;
  a;
}
''');
  }
}