Check in codegen test expectations.

test/codegen/expect/language/regress_22443_test.js

Index: test/codegen/expect/language/regress_22443_test.js
diff --git a/test/codegen/expect/language/regress_22443_test.js b/test/codegen/expect/language/regress_22443_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..691c65e6fb8552c0f239e588f9273f025e72e3d1
--- /dev/null
+++ b/test/codegen/expect/language/regress_22443_test.js
@@ -0,0 +1,40 @@
+dart_library.library('language/regress_22443_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__regress_22443_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_22443_test = Object.create(null);
+  const regress_22443_lib = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  regress_22443_test.fooCount = 0;
+  regress_22443_test.foo = function() {
+    regress_22443_test.fooCount = dart.notNull(regress_22443_test.fooCount) + 1;
+    return new regress_22443_lib.LazyClass();
+  };
+  dart.fn(regress_22443_test.foo, VoidTodynamic());
+  regress_22443_test.main = function() {
+    let caughtIt = false;
+    try {
+      regress_22443_test.foo();
+    } catch (e) {
+      caughtIt = true;
+    }
+
+    ;
+    loadLibrary().then(dart.dynamic)(dart.fn(_ => {
+      regress_22443_test.foo();
+      expect$.Expect.isTrue(caughtIt);
+      expect$.Expect.equals(2, regress_22443_test.fooCount);
+    }, dynamicTodynamic()));
+  };
+  dart.fn(regress_22443_test.main, VoidTodynamic());
+  regress_22443_lib.LazyClass = class LazyClass extends core.Object {};
+  // Exports:
+  exports.regress_22443_test = regress_22443_test;
+  exports.regress_22443_lib = regress_22443_lib;
+});