Check in codegen test expectations.

test/codegen/expect/language/regress_23650_test.js

Index: test/codegen/expect/language/regress_23650_test.js
diff --git a/test/codegen/expect/language/regress_23650_test.js b/test/codegen/expect/language/regress_23650_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..fa5f029a802eff7c7031510775149eaf8a74c3e4
--- /dev/null
+++ b/test/codegen/expect/language/regress_23650_test.js
@@ -0,0 +1,46 @@
+dart_library.library('language/regress_23650_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__regress_23650_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 regress_23650_test = Object.create(null);
+  let C = () => (C = dart.constFn(regress_23650_test.C$()))();
+  let COfint = () => (COfint = dart.constFn(regress_23650_test.C$(core.int)))();
+  let COfString = () => (COfString = dart.constFn(regress_23650_test.C$(core.String)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  regress_23650_test.C$ = dart.generic(T => {
+    let COfT = () => (COfT = dart.constFn(regress_23650_test.C$(T)))();
+    class C extends core.Object {
+      foo() {
+      }
+      static new() {
+        try {
+          return new (COfT()).foo();
+        } finally {
+        }
+      }
+    }
+    dart.addTypeTests(C);
+    dart.defineNamedConstructor(C, 'foo');
+    dart.setSignature(C, {
+      constructors: () => ({
+        foo: dart.definiteFunctionType(regress_23650_test.C$(T), []),
+        new: dart.definiteFunctionType(regress_23650_test.C$(T), [])
+      })
+    });
+    return C;
+  });
+  regress_23650_test.C = C();
+  regress_23650_test.main = function() {
+    let c = COfint().new();
+    expect$.Expect.isTrue(COfint().is(c));
+    expect$.Expect.isFalse(COfString().is(c));
+  };
+  dart.fn(regress_23650_test.main, VoidTodynamic());
+  // Exports:
+  exports.regress_23650_test = regress_23650_test;
+});