Mojo: Correctly handle large unsigned integer literals.

mojo/apps/js/bindings/sample_service_unittests.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define([
     "console",
     "mojo/apps/js/test/hexdump",
     "gin/test/expect",
     "mojo/public/interfaces/bindings/tests/sample_service.mojom",
     "mojo/public/interfaces/bindings/tests/sample_import.mojom",
@@ skipping 86 matching lines @@
     expect(foo.name).toBe("Fooby");
     expect(foo.a).toBeTruthy();
     expect(foo.data).toBeNull();
 
     var defaults = new sample.DefaultsTest();
     expect(defaults.a0).toBe(-12);
     expect(defaults.a1).toBe(sample.kTwelve);
     expect(defaults.a2).toBe(1234);
     expect(defaults.a3).toBe(34567);
     expect(defaults.a4).toBe(123456);
-    // TODO(vtl): crbug.com/375522
-    // expect(defaults.a5).toBe(3456789012);
+    expect(defaults.a5).toBe(3456789012);
     expect(defaults.a6).toBe(111111111111);
-    // TODO(vtl): crbug.com/375522 (Also, can we get exact values for large
-    // int64/uint64's in JS?)
-    // expect(defaults.a7).toBe(9999999999999999999);
+    // JS doesn't have a 64 bit integer type so this is just checking that the

[viettrungluu, 2014/07/15 16:08:26]

Partly/vaguely implied by my parenthetical comment is the question of whether we
should have additional methods to get an exact representation of 64-bit types in
JS (e.g., as a high-/low-order pair of numbers or as an ArrayBuffer). Probably
we should, in which case I guess I should file a bug for that.

(Also, I suppose if we were keen, we'd test that we get exact integers at least
out to +/- 2^52 or whatever it is.)

+    // expected and actual values have the same closest double value.
+    expect(defaults.a7).toBe(9999999999999999999);
     expect(defaults.a8).toBe(0x12345);
     expect(defaults.a9).toBe(-0x12345);
     expect(defaults.a10).toBe(1234);
     expect(defaults.a11).toBe(true);
     expect(defaults.a12).toBe(false);
     expect(defaults.a13).toBe(123.25);
     expect(defaults.a14).toBe(1234567890.123);
     expect(defaults.a15).toBe(1E10);
     expect(defaults.a16).toBe(-1.2E+20);
     expect(defaults.a17).toBe(1.23E-20);
@@ skipping 34 matching lines @@
   var serviceProxy = new sample.ServiceProxy(receiver);
 
   checkDefaultValues();
 
   var foo = makeFoo();
   checkFoo(foo);
 
   var port = 10;
   serviceProxy.frobinate(foo, sample.ServiceProxy.BazOptions.BAZ_EXTRA, port);
 });