Check in codegen test expectations.

test/codegen/expect/language/generic_instanceof4_test.js

Index: test/codegen/expect/language/generic_instanceof4_test.js
diff --git a/test/codegen/expect/language/generic_instanceof4_test.js b/test/codegen/expect/language/generic_instanceof4_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..fce106479fea8d07348f9bd84c147139c02c4400
--- /dev/null
+++ b/test/codegen/expect/language/generic_instanceof4_test.js
@@ -0,0 +1,52 @@
+dart_library.library('language/generic_instanceof4_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__generic_instanceof4_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 generic_instanceof4_test = Object.create(null);
+  let A = () => (A = dart.constFn(generic_instanceof4_test.A$()))();
+  let B = () => (B = dart.constFn(generic_instanceof4_test.B$()))();
+  let BOfBB = () => (BOfBB = dart.constFn(generic_instanceof4_test.B$(generic_instanceof4_test.BB)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  generic_instanceof4_test.A$ = dart.generic(T => {
+    class A extends core.Object {
+      foo(x) {
+        if (new core.DateTime.now().millisecondsSinceEpoch == 42) return this.foo(x);
+        return T.is(x);
+      }
+    }
+    dart.addTypeTests(A);
+    dart.setSignature(A, {
+      methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])})
+    });
+    return A;
+  });
+  generic_instanceof4_test.A = A();
+  generic_instanceof4_test.BB = class BB extends core.Object {};
+  generic_instanceof4_test.B$ = dart.generic(T => {
+    let AOfT = () => (AOfT = dart.constFn(generic_instanceof4_test.A$(T)))();
+    class B extends core.Object {
+      foo() {
+        if (new core.DateTime.now().millisecondsSinceEpoch == 42) return this.foo();
+        return new (AOfT())().foo(new generic_instanceof4_test.B());
+      }
+    }
+    dart.addTypeTests(B);
+    B[dart.implements] = () => [generic_instanceof4_test.BB];
+    dart.setSignature(B, {
+      methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [])})
+    });
+    return B;
+  });
+  generic_instanceof4_test.B = B();
+  generic_instanceof4_test.main = function() {
+    expect$.Expect.isTrue(new (BOfBB())().foo());
+  };
+  dart.fn(generic_instanceof4_test.main, VoidTodynamic());
+  // Exports:
+  exports.generic_instanceof4_test = generic_instanceof4_test;
+});