sdk/pkg/analyzer/test/src/diagnostics/undefined_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/dart/analysis/features.dart';
import 'package:analyzer/src/error/codes.dart';
import 'package:analyzer/src/generated/engine.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../dart/resolution/driver_resolution.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(UndefinedMethodTest);
    defineReflectiveTests(UndefinedMethodWithExtensionMethodsTest);
  });
}

@reflectiveTest
class UndefinedMethodTest extends DriverResolutionTest {
  test_constructor_defined() async {
    await assertNoErrorsInCode(r'''
class C {
  C.m();
}
C c = C.m();
''');
  }

  test_functionExpression_callMethod_defined() async {
    await assertNoErrorsInCode(r'''
main() {
  (() => null).call();
}
''');
  }

  test_functionExpression_directCall_defined() async {
    await assertNoErrorsInCode(r'''
main() {
  (() => null)();
}
''');
  }

  test_ignoreTypePropagation() async {
    await assertErrorsInCode(r'''
class A {}
class B extends A {
  m() {}
}
class C {
  f() {
    A a = new B();
    a.m();
  }
}
''', [
      error(StaticTypeWarningCode.UNDEFINED_METHOD, 85, 1),
    ]);
  }

  test_leastUpperBoundWithNull() async {
    await assertErrorsInCode('''
f(bool b, int i) => (b ? null : i).foo();
''', [
      error(StaticTypeWarningCode.UNDEFINED_METHOD, 35, 3),
    ]);
  }

  test_method_undefined_onNull() async {
    await assertErrorsInCode(r'''
Null f(int x) => null;
main() {
  f(42).abs();
}
''', [
      error(StaticTypeWarningCode.UNDEFINED_METHOD, 40, 3),
    ]);
  }

  test_static_conditionalAccess_defined() async {
    // The conditional access operator '?.' can be used to access static
    // methods.
    await assertNoErrorsInCode('''
class A {
  static void m() {}
}
f() { A?.m(); }
''');
  }
}

@reflectiveTest
class UndefinedMethodWithExtensionMethodsTest extends UndefinedMethodTest {
  @override
  AnalysisOptionsImpl get analysisOptions => AnalysisOptionsImpl()
    ..contextFeatures = FeatureSet.forTesting(
        sdkVersion: '2.3.0', additionalFeatures: [Feature.extension_methods]);

  test_definedInPrivateExtension() async {
    newFile('/test/lib/lib.dart', content: '''
class B {}

extension _ on B {
  void a() {}
}
''');
    await assertErrorsInCode(r'''
import 'lib.dart';

f(B b) {
  b.a();
}
''', [
      error(StaticTypeWarningCode.UNDEFINED_METHOD, 33, 1),
    ]);
  }

  test_definedInUnnamedExtension() async {
    newFile('/test/lib/lib.dart', content: '''
class C {}

extension on C {
  void a() {}
}
''');
    await assertErrorsInCode(r'''
import 'lib.dart';

f(C c) {
  c.a();
}
''', [
      error(StaticTypeWarningCode.UNDEFINED_METHOD, 33, 1),
    ]);
  }

  test_withExtension() async {
    await assertErrorsInCode(r'''
class C {}

extension E on C {
  void a() {}
}

f(C c) {
  c.c();
}
''', [
      error(StaticTypeWarningCode.UNDEFINED_METHOD, 61, 1),
    ]);
  }
}