Check in codegen test expectations.

test/codegen/expect/language/ct_const3_test.js

Index: test/codegen/expect/language/ct_const3_test.js
diff --git a/test/codegen/expect/language/ct_const3_test.js b/test/codegen/expect/language/ct_const3_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..14e39456ad08105e4dddc3ff88f2213f72369120
--- /dev/null
+++ b/test/codegen/expect/language/ct_const3_test.js
@@ -0,0 +1,23 @@
+dart_library.library('language/ct_const3_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__ct_const3_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 ct_const3_test = Object.create(null);
+  let VoidToint = () => (VoidToint = dart.constFn(dart.definiteFunctionType(core.int, [])))();
+  ct_const3_test.O = 1 + 3;
+  ct_const3_test.N = 1;
+  ct_const3_test.P = 2 * (ct_const3_test.O - ct_const3_test.N);
+  ct_const3_test.main = function() {
+    expect$.Expect.equals(1, ct_const3_test.N);
+    expect$.Expect.equals(4, ct_const3_test.O);
+    expect$.Expect.equals(6, ct_const3_test.P);
+  };
+  dart.fn(ct_const3_test.main, VoidToint());
+  // Exports:
+  exports.ct_const3_test = ct_const3_test;
+});