Check in codegen test expectations.

test/codegen/expect/lib/html/non_instantiated_is_test.js

Index: test/codegen/expect/lib/html/non_instantiated_is_test.js
diff --git a/test/codegen/expect/lib/html/non_instantiated_is_test.js b/test/codegen/expect/lib/html/non_instantiated_is_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..a54a71c12cc690c8651c137af65458526266e743
--- /dev/null
+++ b/test/codegen/expect/lib/html/non_instantiated_is_test.js
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+dart_library.library('lib/html/non_instantiated_is_test', null, /* Imports */[
+  'dart_sdk',
+  'unittest'
+], function load__non_instantiated_is_test(exports, dart_sdk, unittest) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const html = dart_sdk.html;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const html_config = unittest.html_config;
+  const unittest$ = unittest.unittest;
+  const src__matcher__expect = unittest.src__matcher__expect;
+  const src__matcher__core_matchers = unittest.src__matcher__core_matchers;
+  const non_instantiated_is_test = Object.create(null);
+  let JSArrayOfObject = () => (JSArrayOfObject = dart.constFn(_interceptors.JSArray$(core.Object)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  dart.defineLazy(non_instantiated_is_test, {
+    get a() {
+      return JSArrayOfObject().of([new core.Object()]);
+    },
+    set a(_) {}
+  });
+  non_instantiated_is_test.main = function() {
+    html_config.useHtmlConfiguration();
+    unittest$.test('is', dart.fn(() => {
+      src__matcher__expect.expect(html.Node.is(non_instantiated_is_test.a[dartx.get](0)), src__matcher__core_matchers.isFalse);
+    }, VoidTodynamic()));
+  };
+  dart.fn(non_instantiated_is_test.main, VoidTodynamic());
+  // Exports:
+  exports.non_instantiated_is_test = non_instantiated_is_test;
+});