Check in codegen test expectations.

test/codegen/expect/language/function_subtype_factory0_test.js

Index: test/codegen/expect/language/function_subtype_factory0_test.js
diff --git a/test/codegen/expect/language/function_subtype_factory0_test.js b/test/codegen/expect/language/function_subtype_factory0_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..7b3329dea6cf9c78d56d906bbccab6e9f99ec6f8
--- /dev/null
+++ b/test/codegen/expect/language/function_subtype_factory0_test.js
@@ -0,0 +1,56 @@
+dart_library.library('language/function_subtype_factory0_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__function_subtype_factory0_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 function_subtype_factory0_test = Object.create(null);
+  let Foo = () => (Foo = dart.constFn(function_subtype_factory0_test.Foo$()))();
+  let C = () => (C = dart.constFn(function_subtype_factory0_test.C$()))();
+  let COfString = () => (COfString = dart.constFn(function_subtype_factory0_test.C$(core.String)))();
+  let COfbool = () => (COfbool = dart.constFn(function_subtype_factory0_test.C$(core.bool)))();
+  let StringTovoid = () => (StringTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [core.String])))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  function_subtype_factory0_test.Foo$ = dart.generic(T => {
+    const Foo = dart.typedef('Foo', () => dart.functionType(dart.void, [T]));
+    return Foo;
+  });
+  function_subtype_factory0_test.Foo = Foo();
+  function_subtype_factory0_test.C$ = dart.generic(T => {
+    let FooOfT = () => (FooOfT = dart.constFn(function_subtype_factory0_test.Foo$(T)))();
+    let COfT = () => (COfT = dart.constFn(function_subtype_factory0_test.C$(T)))();
+    class C extends core.Object {
+      static new(foo) {
+        if (FooOfT().is(foo)) {
+          return new (COfT()).internal();
+        }
+        return null;
+      }
+      internal() {
+      }
+    }
+    dart.addTypeTests(C);
+    dart.defineNamedConstructor(C, 'internal');
+    dart.setSignature(C, {
+      constructors: () => ({
+        new: dart.definiteFunctionType(function_subtype_factory0_test.C$(T), [dart.dynamic]),
+        internal: dart.definiteFunctionType(function_subtype_factory0_test.C$(T), [])
+      })
+    });
+    return C;
+  });
+  function_subtype_factory0_test.C = C();
+  function_subtype_factory0_test.method = function(s) {
+  };
+  dart.fn(function_subtype_factory0_test.method, StringTovoid());
+  function_subtype_factory0_test.main = function() {
+    expect$.Expect.isNotNull(COfString().new(function_subtype_factory0_test.method));
+    expect$.Expect.isNull(COfbool().new(function_subtype_factory0_test.method));
+  };
+  dart.fn(function_subtype_factory0_test.main, VoidTovoid());
+  // Exports:
+  exports.function_subtype_factory0_test = function_subtype_factory0_test;
+});