Check in codegen test expectations.

test/codegen/expect/language/constructor_default_test.js

Index: test/codegen/expect/language/constructor_default_test.js
diff --git a/test/codegen/expect/language/constructor_default_test.js b/test/codegen/expect/language/constructor_default_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..9ce1574bbba2a412c782b7424ad7c45c76e4eba1
--- /dev/null
+++ b/test/codegen/expect/language/constructor_default_test.js
@@ -0,0 +1,35 @@
+dart_library.library('language/constructor_default_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__constructor_default_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 constructor_default_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  constructor_default_test.A = class A extends core.Object {
+    new() {
+      this.a = 499;
+    }
+  };
+  dart.setSignature(constructor_default_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(constructor_default_test.A, [])})
+  });
+  constructor_default_test.B = class B extends constructor_default_test.A {
+    new() {
+      super.new();
+      expect$.Expect.equals(499, this.a);
+    }
+  };
+  dart.setSignature(constructor_default_test.B, {
+    constructors: () => ({new: dart.definiteFunctionType(constructor_default_test.B, [])})
+  });
+  constructor_default_test.main = function() {
+    new constructor_default_test.B();
+  };
+  dart.fn(constructor_default_test.main, VoidTodynamic());
+  // Exports:
+  exports.constructor_default_test = constructor_default_test;
+});