Check in codegen test expectations.

test/codegen/expect/corelib/type_hashcode_test.js

Index: test/codegen/expect/corelib/type_hashcode_test.js
diff --git a/test/codegen/expect/corelib/type_hashcode_test.js b/test/codegen/expect/corelib/type_hashcode_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..221cfc120915e582fef1b4b9176670cf94a673ed
--- /dev/null
+++ b/test/codegen/expect/corelib/type_hashcode_test.js
@@ -0,0 +1,24 @@
+dart_library.library('corelib/type_hashcode_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__type_hashcode_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 type_hashcode_test = Object.create(null);
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  type_hashcode_test.main = function() {
+    let h = "hello", w = "world";
+    expect$.Expect.notEquals(dart.hashCode(h), dart.hashCode(w));
+    expect$.Expect.notEquals(dart.wrapType(core.String).hashCode, dart.wrapType(core.int).hashCode);
+    let c = dart.hashCode(dart.runtimeType(h));
+    expect$.Expect.isTrue(typeof c == 'number');
+    expect$.Expect.notEquals(c, null);
+    expect$.Expect.notEquals(c, 0);
+  };
+  dart.fn(type_hashcode_test.main, VoidTovoid());
+  // Exports:
+  exports.type_hashcode_test = type_hashcode_test;
+});