Check in codegen test expectations.

test/codegen/expect/language/const_map_test.js

Index: test/codegen/expect/language/const_map_test.js
diff --git a/test/codegen/expect/language/const_map_test.js b/test/codegen/expect/language/const_map_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..42f27aec4b120a0c02c82f60fb9d9b76ce931d2c
--- /dev/null
+++ b/test/codegen/expect/language/const_map_test.js
@@ -0,0 +1,27 @@
+dart_library.library('language/const_map_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__const_map_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 const_map_test = Object.create(null);
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  const_map_test.confuse = function(x) {
+    if (dart.equals(new core.DateTime.now(), 42)) return const_map_test.confuse(2);
+    return x;
+  };
+  dart.fn(const_map_test.confuse, dynamicTodynamic());
+  let const$;
+  const_map_test.main = function() {
+    let m = const$ || (const$ = dart.const(dart.map([1, 42, "foo", 499])));
+    expect$.Expect.equals(42, m[dartx.get](const_map_test.confuse(1.0)));
+    expect$.Expect.equals(499, m[dartx.get](const_map_test.confuse(core.String.fromCharCodes("foo"[dartx.runes]))));
+  };
+  dart.fn(const_map_test.main, VoidTodynamic());
+  // Exports:
+  exports.const_map_test = const_map_test;
+});