pkg/analyzer/test/src/diagnostics/undefined_extension_method_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(UndefinedExtensionMethodTest);
  });
}

@reflectiveTest
class UndefinedExtensionMethodTest extends PubPackageResolutionTest {
  test_method_defined() async {
    await assertNoErrorsInCode('''
extension E on String {
  int m() => 0;
}
f() {
  E('a').m();
}
''');
  }

  test_method_undefined() async {
    await assertErrorsInCode('''
extension E on String {}
f() {
  E('a').m();
}
''', [
      error(CompileTimeErrorCode.UNDEFINED_EXTENSION_METHOD, 40, 1),
    ]);
    var invocation = findNode.methodInvocation('m();');
    assertMethodInvocation(
      invocation,
      null,
      'dynamic',
      expectedType: 'dynamic',
    );
  }

  test_static_withInference() async {
    await assertErrorsInCode('''
extension E on Object {}
var a = E.m();
''', [
      error(CompileTimeErrorCode.UNDEFINED_EXTENSION_METHOD, 35, 1),
    ]);
  }

  test_static_withoutInference() async {
    await assertErrorsInCode('''
extension E on Object {}
void f() {
  E.m();
}
''', [
      error(CompileTimeErrorCode.UNDEFINED_EXTENSION_METHOD, 40, 1),
    ]);
  }
}