Check in codegen test expectations.

test/codegen/expect/language/interceptor5_test.js

Index: test/codegen/expect/language/interceptor5_test.js
diff --git a/test/codegen/expect/language/interceptor5_test.js b/test/codegen/expect/language/interceptor5_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..19903b2ff28621af5ba812f881a33571aa3bb776
--- /dev/null
+++ b/test/codegen/expect/language/interceptor5_test.js
@@ -0,0 +1,27 @@
+dart_library.library('language/interceptor5_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__interceptor5_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const interceptor5_test = Object.create(null);
+  let VoidToint = () => (VoidToint = dart.constFn(dart.functionType(core.int, [])))();
+  let JSArrayOfVoidToint = () => (JSArrayOfVoidToint = dart.constFn(_interceptors.JSArray$(VoidToint())))();
+  let VoidToint$ = () => (VoidToint$ = dart.constFn(dart.definiteFunctionType(core.int, [])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  dart.copyProperties(interceptor5_test, {
+    get X() {
+      return JSArrayOfVoidToint().of([dart.fn(() => 123, VoidToint$())]);
+    }
+  });
+  interceptor5_test.main = function() {
+    expect$.Expect.equals(123, dart.dsend(interceptor5_test.X, 'last'));
+  };
+  dart.fn(interceptor5_test.main, VoidTodynamic());
+  // Exports:
+  exports.interceptor5_test = interceptor5_test;
+});