Check in codegen test expectations.

test/codegen/expect/language/async_star_stream_take_test.js

+dart_library.library('language/async_star_stream_take_test', null, /* Imports */[
+  'dart_sdk',
+  'async_helper',
+  'expect'
+], function load__async_star_stream_take_test(exports, dart_sdk, async_helper, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const async = dart_sdk.async;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const async_helper$ = async_helper.async_helper;
+  const expect$ = expect.expect;
+  const async_star_stream_take_test = Object.create(null);
+  let intToStream = () => (intToStream = dart.constFn(dart.definiteFunctionType(async.Stream, [core.int])))();
+  let StreamTodynamic = () => (StreamTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [async.Stream])))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  async_star_stream_take_test.makeStream = function(n) {
+    return dart.asyncStar(function*(stream, n) {
+      for (let i = 0; i < dart.notNull(n); i++) {
+        if (stream.add(i)) return;
+        yield;
+      }
+    }, dart.dynamic, n);
+  };
+  dart.fn(async_star_stream_take_test.makeStream, intToStream());
+  async_star_stream_take_test.main = function() {
+    function f(s) {
+      return dart.async(function*(s) {
+        let r = 0;
+        let it = async.StreamIterator.new(s.take(5));
+        try {
+          while (yield it.moveNext()) {
+            let v = it.current;
+            r = dart.notNull(r) + dart.notNull(core.int._check(v));
+          }
+        } finally {
+          yield it.cancel();
+        }
+        return r;
+      }, dart.dynamic, s);
+    }
+    dart.fn(f, StreamTodynamic());
+    async_helper$.asyncStart();
+    dart.dsend(f(async_star_stream_take_test.makeStream(10)), 'then', dart.fn(v => {
+      expect$.Expect.equals(10, v);
+      async_helper$.asyncEnd();
+    }, dynamicTodynamic()));
+  };
+  dart.fn(async_star_stream_take_test.main, VoidTodynamic());
+  // Exports:
+  exports.async_star_stream_take_test = async_star_stream_take_test;
+});