Check in codegen test expectations.

test/codegen/expect/language/do_while3_test.js

Index: test/codegen/expect/language/do_while3_test.js
diff --git a/test/codegen/expect/language/do_while3_test.js b/test/codegen/expect/language/do_while3_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..5560ff0be198fec3ee8f60e0aaec3d25c1c91021
--- /dev/null
+++ b/test/codegen/expect/language/do_while3_test.js
@@ -0,0 +1,22 @@
+dart_library.library('language/do_while3_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__do_while3_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_while3_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  do_while3_test.main = function() {
+    let c = 0;
+    do {
+      c++;
+    } while (c++ < 2);
+    expect$.Expect.equals(4, c);
+  };
+  dart.fn(do_while3_test.main, VoidTodynamic());
+  // Exports:
+  exports.do_while3_test = do_while3_test;
+});