#395. Object methods test added
diff --git a/LanguageFeatures/Extension-methods/syntax_member_declarations_t01.dart b/LanguageFeatures/Extension-methods/syntax_member_declarations_t01.dart
index cf99f0a..5fa2a8d 100644
--- a/LanguageFeatures/Extension-methods/syntax_member_declarations_t01.dart
+++ b/LanguageFeatures/Extension-methods/syntax_member_declarations_t01.dart
@@ -12,7 +12,9 @@
* `}'
* ...
* The member declarations can be any non-abstract static or instance member
- * declaration except for instance variables and constructors.
+ * declaration except for instance variables and constructors, and they cannot
+ * have the same name as a member declared by Object (==, hashCode , toString,
+ * runtimeType or noSuchMethod)
*
* @description Check that the member declarations can be any non-abstract
* static or instance member
diff --git a/LanguageFeatures/Extension-methods/syntax_member_declarations_t02.dart b/LanguageFeatures/Extension-methods/syntax_member_declarations_t02.dart
index d82156f..bcbeb28 100644
--- a/LanguageFeatures/Extension-methods/syntax_member_declarations_t02.dart
+++ b/LanguageFeatures/Extension-methods/syntax_member_declarations_t02.dart
@@ -12,7 +12,9 @@
* `}'
* ...
* The member declarations can be any non-abstract static or instance member
- * declaration except for instance variables and constructors.
+ * declaration except for instance variables and constructors, and they cannot
+ * have the same name as a member declared by Object (==, hashCode , toString,
+ * runtimeType or noSuchMethod)
*
* @description Check that it is a compile error if extension declares an
* instance variable, constructor or abstract method
diff --git a/LanguageFeatures/Extension-methods/syntax_member_declarations_t03.dart b/LanguageFeatures/Extension-methods/syntax_member_declarations_t03.dart
new file mode 100644
index 0000000..565ff0d
--- /dev/null
+++ b/LanguageFeatures/Extension-methods/syntax_member_declarations_t03.dart
@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+/**
+ * @assertion an extension declaration is a top-level declaration with a grammar
+ * similar to:
+ * <extension> ::=
+ * `extension' <identifier>? <typeParameters>? `on' <type> `?'? `{'
+ * memberDeclaration*
+ * `}'
+ * ...
+ * The member declarations can be any non-abstract static or instance member
+ * declaration except for instance variables and constructors, and they cannot
+ * have the same name as a member declared by Object (==, hashCode , toString,
+ * runtimeType or noSuchMethod)
+ *
+ * @description Check that it is a compile error if extension declares members
+ * with the same name as a member declared by Object (==, hashCode , toString,
+ * runtimeType or noSuchMethod)
+ * @author sgrekhov@unipro.ru
+ */
+// SharedOptions=--enable-experiment=extension-methods
+
+extension ExtendedList<T> on List<T> {
+ dynamic noSuchMethod (Invocation invocation) => null; //# 01: compile-time error
+ bool operator == (dynamic other) => true; //# 02: compile-time error
+ int get hashCode => 42; //# 03: compile-time error
+ Type get runtimeType => this.runtimeType; //# 04: compile-time error
+ String toString() => "Run, Forrest, run"; //# 05: compile-time error
+}
+
+main() {
+ List<String> list = ["Lily", "was", "here"];
+}
