Check in codegen test expectations.

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

Index: test/codegen/expect/lib/html/uri_test.js
diff --git a/test/codegen/expect/lib/html/uri_test.js b/test/codegen/expect/lib/html/uri_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..a2e22d7c7a7e334b68667d4d13907d34405aa2b6
--- /dev/null
+++ b/test/codegen/expect/lib/html/uri_test.js
@@ -0,0 +1,25 @@
+dart_library.library('lib/html/uri_test', null, /* Imports */[
+  'dart_sdk',
+  'unittest'
+], function load__uri_test(exports, dart_sdk, unittest) {
+  'use strict';
+  const core = dart_sdk.core;
+  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 uri_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  uri_test.main = function() {
+    html_config.useHtmlConfiguration();
+    unittest$.test('Uri.base', dart.fn(() => {
+      src__matcher__expect.expect(core.Uri.base.scheme, "http");
+      src__matcher__expect.expect(dart.toString(core.Uri.base), html.window[dartx.location][dartx.href]);
+    }, VoidTodynamic()));
+  };
+  dart.fn(uri_test.main, VoidTodynamic());
+  // Exports:
+  exports.uri_test = uri_test;
+});