#1207. More enhanced enums tests added

LanguageFeatures/Enhanced-Enum/grammar_A04_t04.dart

@@ -0,0 +1,34 @@
+// Copyright (c) 2021, 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 We propose the following to also be allowed:
+///
+/// enum Name<T> with Mixin1, Mixin2 implements Interface1, Interface2 {
+///   id1<int>(args1), id2<String>(args2), id3<bool>(args3);
+///   memberDeclaration*
+///   const Name(params) : initList;
+/// }
+/// where memberDeclaration* is any sequence of static and instance member
+/// declarations and/or an unnamed generative const constructor declaration.
+///
+/// @description Check that type argument without arguments is not allowed
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enhanced-enums
+
+enum E1<T> {
+  e1<int>,
+//       ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  e2<String>,
+//       ^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
+
+main() {
+  E1.e1;
+  E1.e2;
+}

LanguageFeatures/Enhanced-Enum/grammar_A09_t04.dart

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+// Copyright (c) 2021, 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 We propose the following to also be allowed:
+///
+/// enum Name<T> with Mixin1, Mixin2 implements Interface1, Interface2 {
+///   id1<int>(args1), id2<String>(args2), id3<bool>(args3);
+///   memberDeclaration*
+///   const Name(params) : initList;
+/// }
+/// where memberDeclaration* is any sequence of static and instance member
+/// declarations and/or an unnamed generative const constructor declaration.
+///
+/// @description Check that enum declaration may contain 'call' method
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enhanced-enums
+
+import "../../Utils/expect.dart";
+
+enum E1<T> {
+  e1<int>(),
+  e2<String>(),
+  e3<bool>();
+
+  T call(T t) => t
+}
+
+enum E2<T> {
+  e1<int>(1),
+  e2<String>(2),
+  e3<bool>(3);
+
+  const E3(int i);
+  int call(T t) => i;
+}
+
+main() {
+  Expect.equals(42, E1.e1(42));
+  Expect.equals("", E1.e2(""));
+  Expect.equals(false, E1.e3(false));
+  Expect.equals(1, E2.e1(42));
+  Expect.equals(2, E2.e2("Lily was here"));
+  Expect.equals(3, E2.e3(true));
+}