Check in codegen test expectations.

test/codegen/expect/language/enum_duplicate_test_none_multi.js

+dart_library.library('language/enum_duplicate_test_none_multi', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__enum_duplicate_test_none_multi(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const enum_duplicate_test_none_multi = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  enum_duplicate_test_none_multi.Enum1 = class Enum1 extends core.Object {
+    new(index) {
+      this.index = index;
+    }
+    toString() {
+      return {
+        0: "Enum1.A",
+        1: "Enum1.B"
+      }[this.index];
+    }
+  };
+  enum_duplicate_test_none_multi.Enum1.A = dart.const(new enum_duplicate_test_none_multi.Enum1(0));
+  enum_duplicate_test_none_multi.Enum1.B = dart.const(new enum_duplicate_test_none_multi.Enum1(1));
+  enum_duplicate_test_none_multi.Enum1.values = dart.constList([enum_duplicate_test_none_multi.Enum1.A, enum_duplicate_test_none_multi.Enum1.B], enum_duplicate_test_none_multi.Enum1);
+  enum_duplicate_test_none_multi.Enum2 = class Enum2 extends core.Object {
+    new(index) {
+      this.index = index;
+    }
+    toString() {
+      return {
+        0: "Enum2.A",
+        1: "Enum2.B"
+      }[this.index];
+    }
+  };
+  enum_duplicate_test_none_multi.Enum2.A = dart.const(new enum_duplicate_test_none_multi.Enum2(0));
+  enum_duplicate_test_none_multi.Enum2.B = dart.const(new enum_duplicate_test_none_multi.Enum2(1));
+  enum_duplicate_test_none_multi.Enum2.values = dart.constList([enum_duplicate_test_none_multi.Enum2.A, enum_duplicate_test_none_multi.Enum2.B], enum_duplicate_test_none_multi.Enum2);
+  enum_duplicate_test_none_multi.main = function() {
+    expect$.Expect.equals('Enum1.A,Enum1.B', enum_duplicate_test_none_multi.Enum1.values[dartx.join](','));
+    expect$.Expect.equals('Enum2.A,Enum2.B', enum_duplicate_test_none_multi.Enum2.values[dartx.join](','));
+  };
+  dart.fn(enum_duplicate_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.enum_duplicate_test_none_multi = enum_duplicate_test_none_multi;
+});