Check in codegen test expectations.

test/codegen/expect/language/generic_async_star_test.js

Index: test/codegen/expect/language/generic_async_star_test.js
diff --git a/test/codegen/expect/language/generic_async_star_test.js b/test/codegen/expect/language/generic_async_star_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..59ddfecce30e8ae44b650127bd61f09451da5c20
--- /dev/null
+++ b/test/codegen/expect/language/generic_async_star_test.js
@@ -0,0 +1,41 @@
+dart_library.library('language/generic_async_star_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__generic_async_star_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const async = dart_sdk.async;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const generic_async_star_test = Object.create(null);
+  let TToStreamOfT = () => (TToStreamOfT = dart.constFn(dart.definiteFunctionType(T => [async.Stream$(T), [T]])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  generic_async_star_test.foo = function(T) {
+    return x => {
+      return dart.asyncStar(function*(stream, x) {
+        for (let i = 0; i < 3; i++) {
+          if (stream.add(x)) return;
+          yield;
+        }
+      }, T, x);
+    };
+  };
+  dart.fn(generic_async_star_test.foo, TToStreamOfT());
+  generic_async_star_test.main = function() {
+    return dart.async(function*() {
+      let it = async.StreamIterator.new(generic_async_star_test.foo(core.int)(1));
+      try {
+        while (yield it.moveNext()) {
+          let x = it.current;
+          expect$.Expect.equals(1, x);
+        }
+      } finally {
+        yield it.cancel();
+      }
+    }, dart.dynamic);
+  };
+  dart.fn(generic_async_star_test.main, VoidTodynamic());
+  // Exports:
+  exports.generic_async_star_test = generic_async_star_test;
+});