Check in codegen test expectations.

test/codegen/expect/language/ackermann_test.js

+dart_library.library('language/ackermann_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__ackermann_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 ackermann_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  ackermann_test.AckermannTest = class AckermannTest extends core.Object {
+    static ack(m, n) {
+      return dart.equals(m, 0) ? dart.dsend(n, '+', 1) : dart.equals(n, 0) ? ackermann_test.AckermannTest.ack(dart.dsend(m, '-', 1), 1) : ackermann_test.AckermannTest.ack(dart.dsend(m, '-', 1), ackermann_test.AckermannTest.ack(m, dart.dsend(n, '-', 1)));
+    }
+    static testMain() {
+      expect$.Expect.equals(253, ackermann_test.AckermannTest.ack(3, 5));
+    }
+  };
+  dart.setSignature(ackermann_test.AckermannTest, {
+    statics: () => ({
+      ack: dart.definiteFunctionType(dart.dynamic, [dart.dynamic, dart.dynamic]),
+      testMain: dart.definiteFunctionType(dart.dynamic, [])
+    }),
+    names: ['ack', 'testMain']
+  });
+  ackermann_test.main = function() {
+    ackermann_test.AckermannTest.testMain();
+  };
+  dart.fn(ackermann_test.main, VoidTodynamic());
+  // Exports:
+  exports.ackermann_test = ackermann_test;
+});