Check in codegen test expectations.

test/codegen/expect/language/do_while4_test.js

Index: test/codegen/expect/language/do_while4_test.js
diff --git a/test/codegen/expect/language/do_while4_test.js b/test/codegen/expect/language/do_while4_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..184115888df464c802a75ca3b1c403111c628bf8
--- /dev/null
+++ b/test/codegen/expect/language/do_while4_test.js
@@ -0,0 +1,24 @@
+dart_library.library('language/do_while4_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__do_while4_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const do_while4_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  do_while4_test.a = false;
+  do_while4_test.main = function() {
+    do {
+      if (!dart.test(do_while4_test.a)) break;
+      let c = do_while4_test.main();
+      do_while4_test.a = true;
+    } while (true);
+    expect$.Expect.isFalse(do_while4_test.a);
+  };
+  dart.fn(do_while4_test.main, VoidTodynamic());
+  // Exports:
+  exports.do_while4_test = do_while4_test;
+});