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

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

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

@reflectiveTest
class ExtensionAsExpressionTest extends PubPackageResolutionTest {
  test_prefixedIdentifier() async {
    newFile('$testPackageLibPath/a.dart', r'''
extension E on int {}
''');
    var result = await resolveTestCodeWithDiagnostics(r'''
import 'a.dart' as p;
var v = p.E;
//      ^^^
// [diag.extensionAsExpression] Extension 'p.E' can't be used as an expression.
''');
    assertTypeDynamic(result.findNode.simple('E;'));
    assertTypeDynamic(result.findNode.prefixed('p.E;'));
  }

  test_simpleIdentifier() async {
    var result = await resolveTestCodeWithDiagnostics(r'''
extension E on int {}
var v = E;
//      ^
// [diag.extensionAsExpression] Extension 'E' can't be used as an expression.
''');
    assertTypeDynamic(result.findNode.simple('E;'));
  }
}