Check in codegen test expectations.

test/codegen/expect/language/super_operator_index2_test.js

Index: test/codegen/expect/language/super_operator_index2_test.js
diff --git a/test/codegen/expect/language/super_operator_index2_test.js b/test/codegen/expect/language/super_operator_index2_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..c3cbea4307ce20be4105be4fe4a4e172f4dc92e4
--- /dev/null
+++ b/test/codegen/expect/language/super_operator_index2_test.js
@@ -0,0 +1,51 @@
+dart_library.library('language/super_operator_index2_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__super_operator_index2_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 super_operator_index2_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  super_operator_index2_test.A = class A extends core.Object {
+    new() {
+      this.map = core.Map.new();
+    }
+    set(a, b) {
+      this.map[dartx.set](a, b);
+      return b;
+    }
+    get(a) {
+      return this.map[dartx.get](a);
+    }
+  };
+  dart.setSignature(super_operator_index2_test.A, {
+    methods: () => ({
+      set: dart.definiteFunctionType(dart.dynamic, [dart.dynamic, dart.dynamic]),
+      get: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])
+    })
+  });
+  super_operator_index2_test.B = class B extends super_operator_index2_test.A {
+    new() {
+      super.new();
+    }
+    foo() {
+      super.set(4, 42);
+      expect$.Expect.equals(42, super.get(4));
+      let i = 4;
+      super.set(i, dart.dsend(super.get(i), '+', 5));
+      expect$.Expect.equals(47, super.get(4));
+    }
+  };
+  dart.setSignature(super_operator_index2_test.B, {
+    methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [])})
+  });
+  super_operator_index2_test.main = function() {
+    new super_operator_index2_test.B().foo();
+  };
+  dart.fn(super_operator_index2_test.main, VoidTodynamic());
+  // Exports:
+  exports.super_operator_index2_test = super_operator_index2_test;
+});