Check in codegen test expectations.

test/codegen/expect/language/regress_10996_test.js

Index: test/codegen/expect/language/regress_10996_test.js
diff --git a/test/codegen/expect/language/regress_10996_test.js b/test/codegen/expect/language/regress_10996_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..12e0db44fb70601661bf249fac2acb39d8152def
--- /dev/null
+++ b/test/codegen/expect/language/regress_10996_test.js
@@ -0,0 +1,39 @@
+dart_library.library('language/regress_10996_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__regress_10996_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 regress_10996_test = Object.create(null);
+  const regress_10996_lib = Object.create(null);
+  let dynamic__Todynamic = () => (dynamic__Todynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic], [dart.dynamic])))();
+  let dynamic__Todynamic$ = () => (dynamic__Todynamic$ = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic], {d: dart.dynamic})))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  regress_10996_test.foo = function(a, b) {
+    if (b === void 0) b = null;
+    return dart.dsend(dart.dsend(dart.dsend(a, '+', b), '+', regress_10996_lib.a), '+', regress_10996_lib.b);
+  };
+  dart.fn(regress_10996_test.foo, dynamic__Todynamic());
+  regress_10996_test.bar = function(c, opts) {
+    let d = opts && 'd' in opts ? opts.d : null;
+    return dart.dsend(dart.dsend(dart.dsend(c, '+', d), '+', regress_10996_lib.c), '+', regress_10996_lib.d);
+  };
+  dart.fn(regress_10996_test.bar, dynamic__Todynamic$());
+  regress_10996_test.main = function() {
+    expect$.Expect.equals(1 + 2 + 3 + 4, regress_10996_test.foo(1, 2));
+    expect$.Expect.equals(7 + 8 + 3 + 4, regress_10996_test.foo(7, 8));
+    expect$.Expect.equals(3 + 4 + 5 + 6, regress_10996_test.bar(3, {d: 4}));
+    expect$.Expect.equals(7 + 8 + 5 + 6, regress_10996_test.bar(7, {d: 8}));
+  };
+  dart.fn(regress_10996_test.main, VoidTodynamic());
+  regress_10996_lib.a = 3;
+  regress_10996_lib.b = 4;
+  regress_10996_lib.c = 5;
+  regress_10996_lib.d = 6;
+  // Exports:
+  exports.regress_10996_test = regress_10996_test;
+  exports.regress_10996_lib = regress_10996_lib;
+});