Check in codegen test expectations.

test/codegen/expect/language/is_operator_test.js

Index: test/codegen/expect/language/is_operator_test.js
diff --git a/test/codegen/expect/language/is_operator_test.js b/test/codegen/expect/language/is_operator_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..df14f70a14d25fa157726acd824fd3bb262878ec
--- /dev/null
+++ b/test/codegen/expect/language/is_operator_test.js
@@ -0,0 +1,103 @@
+dart_library.library('language/is_operator_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__is_operator_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 is_operator_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  is_operator_test.I = class I extends core.Object {};
+  is_operator_test.AI = class AI extends core.Object {};
+  is_operator_test.AI[dart.implements] = () => [is_operator_test.I];
+  is_operator_test.A = class A extends core.Object {
+    new() {
+    }
+  };
+  is_operator_test.A[dart.implements] = () => [is_operator_test.AI];
+  dart.setSignature(is_operator_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(is_operator_test.A, [])})
+  });
+  is_operator_test.B = class B extends core.Object {
+    new() {
+    }
+  };
+  is_operator_test.B[dart.implements] = () => [is_operator_test.I];
+  dart.setSignature(is_operator_test.B, {
+    constructors: () => ({new: dart.definiteFunctionType(is_operator_test.B, [])})
+  });
+  is_operator_test.C = class C extends is_operator_test.A {
+    new() {
+      super.new();
+    }
+  };
+  dart.setSignature(is_operator_test.C, {
+    constructors: () => ({new: dart.definiteFunctionType(is_operator_test.C, [])})
+  });
+  is_operator_test.IsOperatorTest = class IsOperatorTest extends core.Object {
+    static testMain() {
+      let a = new is_operator_test.A();
+      let b = new is_operator_test.B();
+      let c = new is_operator_test.C();
+      let n = null;
+      expect$.Expect.equals(true, is_operator_test.A.is(a));
+      expect$.Expect.equals(false, !is_operator_test.A.is(a));
+      expect$.Expect.equals(true, is_operator_test.B.is(b));
+      expect$.Expect.equals(false, !is_operator_test.B.is(b));
+      expect$.Expect.equals(true, is_operator_test.C.is(c));
+      expect$.Expect.equals(false, !is_operator_test.C.is(c));
+      expect$.Expect.equals(true, is_operator_test.A.is(c));
+      expect$.Expect.equals(false, !is_operator_test.A.is(c));
+      expect$.Expect.equals(true, is_operator_test.AI.is(a));
+      expect$.Expect.equals(false, !is_operator_test.AI.is(a));
+      expect$.Expect.equals(true, is_operator_test.I.is(a));
+      expect$.Expect.equals(false, !is_operator_test.I.is(a));
+      expect$.Expect.equals(false, is_operator_test.AI.is(b));
+      expect$.Expect.equals(true, !is_operator_test.AI.is(b));
+      expect$.Expect.equals(true, is_operator_test.I.is(b));
+      expect$.Expect.equals(false, !is_operator_test.I.is(b));
+      expect$.Expect.equals(true, is_operator_test.AI.is(c));
+      expect$.Expect.equals(false, !is_operator_test.AI.is(c));
+      expect$.Expect.equals(true, is_operator_test.I.is(c));
+      expect$.Expect.equals(false, !is_operator_test.I.is(c));
+      expect$.Expect.equals(false, is_operator_test.AI.is(n));
+      expect$.Expect.equals(true, !is_operator_test.AI.is(n));
+      expect$.Expect.equals(false, is_operator_test.I.is(n));
+      expect$.Expect.equals(true, !is_operator_test.I.is(n));
+      expect$.Expect.equals(false, is_operator_test.B.is(a));
+      expect$.Expect.equals(true, !is_operator_test.B.is(a));
+      expect$.Expect.equals(false, is_operator_test.C.is(a));
+      expect$.Expect.equals(true, !is_operator_test.C.is(a));
+      expect$.Expect.equals(false, is_operator_test.A.is(b));
+      expect$.Expect.equals(true, !is_operator_test.A.is(b));
+      expect$.Expect.equals(false, is_operator_test.C.is(b));
+      expect$.Expect.equals(true, !is_operator_test.C.is(b));
+      expect$.Expect.equals(false, is_operator_test.B.is(c));
+      expect$.Expect.equals(true, !is_operator_test.B.is(c));
+      expect$.Expect.equals(false, is_operator_test.A.is(n));
+      expect$.Expect.equals(true, !is_operator_test.A.is(n));
+      expect$.Expect.equals(false, is_operator_test.A.is(null));
+      expect$.Expect.equals(false, is_operator_test.B.is(null));
+      expect$.Expect.equals(false, is_operator_test.C.is(null));
+      expect$.Expect.equals(false, is_operator_test.AI.is(null));
+      expect$.Expect.equals(false, is_operator_test.I.is(null));
+      expect$.Expect.equals(true, !is_operator_test.A.is(null));
+      expect$.Expect.equals(true, !is_operator_test.B.is(null));
+      expect$.Expect.equals(true, !is_operator_test.C.is(null));
+      expect$.Expect.equals(true, !is_operator_test.AI.is(null));
+      expect$.Expect.equals(true, !is_operator_test.I.is(null));
+    }
+  };
+  dart.setSignature(is_operator_test.IsOperatorTest, {
+    statics: () => ({testMain: dart.definiteFunctionType(dart.dynamic, [])}),
+    names: ['testMain']
+  });
+  is_operator_test.main = function() {
+    is_operator_test.IsOperatorTest.testMain();
+  };
+  dart.fn(is_operator_test.main, VoidTodynamic());
+  // Exports:
+  exports.is_operator_test = is_operator_test;
+});