Check in codegen test expectations.

test/codegen/expect/corelib/string_fromcharcode_test.js

Index: test/codegen/expect/corelib/string_fromcharcode_test.js
diff --git a/test/codegen/expect/corelib/string_fromcharcode_test.js b/test/codegen/expect/corelib/string_fromcharcode_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..83244968a2b5caeea463662fa50aa5b4b46a7bce
--- /dev/null
+++ b/test/codegen/expect/corelib/string_fromcharcode_test.js
@@ -0,0 +1,34 @@
+dart_library.library('corelib/string_fromcharcode_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__string_fromcharcode_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 string_fromcharcode_test = Object.create(null);
+  let VoidToString = () => (VoidToString = dart.constFn(dart.definiteFunctionType(core.String, [])))();
+  let dynamicTobool = () => (dynamicTobool = dart.constFn(dart.definiteFunctionType(core.bool, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  string_fromcharcode_test.main = function() {
+    expect$.Expect.equals("A", core.String.fromCharCode(65));
+    expect$.Expect.equals("B", core.String.fromCharCode(66));
+    let gClef = core.String.fromCharCode(119070);
+    expect$.Expect.equals(2, gClef[dartx.length]);
+    expect$.Expect.equals(55348, gClef[dartx.codeUnitAt](0));
+    expect$.Expect.equals(56606, gClef[dartx.codeUnitAt](1));
+    let unmatched = core.String.fromCharCode(55296);
+    expect$.Expect.equals(1, unmatched[dartx.length]);
+    expect$.Expect.equals(55296, unmatched[dartx.codeUnitAt](0));
+    unmatched = core.String.fromCharCode(56320);
+    expect$.Expect.equals(1, unmatched[dartx.length]);
+    expect$.Expect.equals(56320, unmatched[dartx.codeUnitAt](0));
+    expect$.Expect.throws(dart.fn(() => core.String.fromCharCode(-1), VoidToString()), dart.fn(e => core.ArgumentError.is(e), dynamicTobool()));
+    expect$.Expect.throws(dart.fn(() => core.String.fromCharCode(1114112), VoidToString()), dart.fn(e => core.ArgumentError.is(e), dynamicTobool()));
+    expect$.Expect.throws(dart.fn(() => core.String.fromCharCode(1114113), VoidToString()), dart.fn(e => core.ArgumentError.is(e), dynamicTobool()));
+  };
+  dart.fn(string_fromcharcode_test.main, VoidTodynamic());
+  // Exports:
+  exports.string_fromcharcode_test = string_fromcharcode_test;
+});