Check in codegen test expectations.

test/codegen/expect/language/async_star_regression_23116_test.js

Index: test/codegen/expect/language/async_star_regression_23116_test.js
diff --git a/test/codegen/expect/language/async_star_regression_23116_test.js b/test/codegen/expect/language/async_star_regression_23116_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..74c16665e44bec3d630eee8e034fe80e6c676a07
--- /dev/null
+++ b/test/codegen/expect/language/async_star_regression_23116_test.js
@@ -0,0 +1,46 @@
+dart_library.library('language/async_star_regression_23116_test', null, /* Imports */[
+  'dart_sdk',
+  'expect',
+  'async_helper'
+], function load__async_star_regression_23116_test(exports, dart_sdk, expect, async_helper) {
+  '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 async_helper$ = async_helper.async_helper;
+  const async_star_regression_23116_test = Object.create(null);
+  let StreamOfint = () => (StreamOfint = dart.constFn(async.Stream$(core.int)))();
+  let CompleterAndFutureToStreamOfint = () => (CompleterAndFutureToStreamOfint = dart.constFn(dart.definiteFunctionType(StreamOfint(), [async.Completer, async.Future])))();
+  let intTovoid = () => (intTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [core.int])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicTovoid = () => (dynamicTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [dart.dynamic])))();
+  async_star_regression_23116_test.foo = function(completer, future) {
+    return dart.asyncStar(function*(stream, completer, future) {
+      completer.complete(100);
+      let x = core.int._check(yield future);
+      expect$.Expect.equals(42, x);
+    }, core.int, completer, future);
+  };
+  dart.fn(async_star_regression_23116_test.foo, CompleterAndFutureToStreamOfint());
+  async_star_regression_23116_test.test = function() {
+    return dart.async(function*() {
+      let completer1 = async.Completer.new();
+      let completer2 = async.Completer.new();
+      let s = async_star_regression_23116_test.foo(completer1, completer2.future).listen(dart.fn(v => null, intTovoid()));
+      yield completer1.future;
+      s.pause();
+      s.resume();
+      completer2.complete(42);
+    }, dart.dynamic);
+  };
+  dart.fn(async_star_regression_23116_test.test, VoidTodynamic());
+  async_star_regression_23116_test.main = function() {
+    async_helper$.asyncStart();
+    dart.dsend(async_star_regression_23116_test.test(), 'then', dart.fn(_ => async_helper$.asyncEnd(), dynamicTovoid()));
+  };
+  dart.fn(async_star_regression_23116_test.main, VoidTodynamic());
+  // Exports:
+  exports.async_star_regression_23116_test = async_star_regression_23116_test;
+});