Check in codegen test expectations.

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

Index: test/codegen/expect/lib/html/touchevent_test.js
diff --git a/test/codegen/expect/lib/html/touchevent_test.js b/test/codegen/expect/lib/html/touchevent_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..087a799338ce1715660360fafc9492d78dd01429
--- /dev/null
+++ b/test/codegen/expect/lib/html/touchevent_test.js
@@ -0,0 +1,38 @@
+dart_library.library('lib/html/touchevent_test', null, /* Imports */[
+  'dart_sdk',
+  'unittest'
+], function load__touchevent_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_individual_config = unittest.html_individual_config;
+  const unittest$ = unittest.unittest;
+  const src__matcher__expect = unittest.src__matcher__expect;
+  const src__matcher__core_matchers = unittest.src__matcher__core_matchers;
+  const src__matcher__throws_matcher = unittest.src__matcher__throws_matcher;
+  const touchevent_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  touchevent_test.main = function() {
+    html_individual_config.useHtmlIndividualConfiguration();
+    unittest$.group('supported', dart.fn(() => {
+      unittest$.test('supported', dart.fn(() => {
+        src__matcher__expect.expect(html.TouchEvent[dartx.supported], true);
+      }, VoidTodynamic()));
+    }, VoidTovoid()));
+    unittest$.group('functional', dart.fn(() => {
+      unittest$.test('unsupported throws', dart.fn(() => {
+        let expectation = dart.test(html.TouchEvent[dartx.supported]) ? src__matcher__core_matchers.returnsNormally : src__matcher__throws_matcher.throws;
+        src__matcher__expect.expect(dart.fn(() => {
+          let e = html.TouchEvent.new(null, null, null, 'touch');
+          src__matcher__expect.expect(html.TouchEvent.is(e), true);
+        }, VoidTodynamic()), expectation);
+      }, VoidTodynamic()));
+    }, VoidTovoid()));
+  };
+  dart.fn(touchevent_test.main, VoidTodynamic());
+  // Exports:
+  exports.touchevent_test = touchevent_test;
+});