Check in codegen test expectations.

test/codegen/expect/language/list_is_test.js

+dart_library.library('language/list_is_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__list_is_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 list_is_test = Object.create(null);
+  let A = () => (A = dart.constFn(list_is_test.A$()))();
+  let ListOfint = () => (ListOfint = dart.constFn(core.List$(core.int)))();
+  let AOfdouble = () => (AOfdouble = dart.constFn(list_is_test.A$(core.double)))();
+  let ListOfdouble = () => (ListOfdouble = dart.constFn(core.List$(core.double)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicAnddynamicAnddynamic__Todynamic = () => (dynamicAnddynamicAnddynamic__Todynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic])))();
+  list_is_test.A$ = dart.generic(T => {
+    let ListOfT = () => (ListOfT = dart.constFn(core.List$(T)))();
+    class A extends core.Object {
+      bar() {
+        return ListOfT().new();
+      }
+    }
+    dart.addTypeTests(A);
+    dart.setSignature(A, {
+      methods: () => ({bar: dart.definiteFunctionType(dart.dynamic, [])})
+    });
+    return A;
+  });
+  list_is_test.A = A();
+  list_is_test.main = function() {
+    list_is_test.check(core.List.new(), true, true, true);
+    list_is_test.check(ListOfint().new(), true, true, false);
+    list_is_test.check(new list_is_test.A().bar(), true, true, true);
+    list_is_test.check(new (AOfdouble())().bar(), true, false, true);
+    list_is_test.check(new core.Object(), false, false, false);
+  };
+  dart.fn(list_is_test.main, VoidTodynamic());
+  list_is_test.check = function(val, expectList, expectListInt, expectListDouble) {
+    expect$.Expect.equals(expectList, core.List.is(val));
+    expect$.Expect.equals(expectListInt, ListOfint().is(val));
+    expect$.Expect.equals(expectListDouble, ListOfdouble().is(val));
+  };
+  dart.fn(list_is_test.check, dynamicAnddynamicAnddynamic__Todynamic());
+  // Exports:
+  exports.list_is_test = list_is_test;
+});