js/xpconnect/tests/chrome/test_private_field_cows.xhtml

   1 <?xml version="1.0"?>
   2 <?xml-stylesheet href="chrome://global/skin" type="text/css"?>
   3 <?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
   4                  type="text/css"?>
   5
   6 <window title="Mozilla Bug ????" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
   7     <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
   8
   9     <!-- test results are displayed in the html:body -->
  10
  11     <body xmlns="http://www.w3.org/1999/xhtml">
  12         <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=>?????" target="_blank">Mozilla Bug ???? </a>
  13     </body>
  14
  15     <!-- test code goes here -->
  16     <script type="application/javascript"><![CDATA[
  17             /* eslint-disable no-eval */
  18
  19             add_task(async () => {
  20                 var sandbox = new Cu.Sandbox("about:blank");
  21
  22                 await SpecialPowers.pushPrefEnv({
  23                     "set": [["security.allow_eval_with_system_principal",
  24                         true]]
  25                 });
  26
  27                 function getCOW(x) {
  28                     if (typeof x != 'object' && typeof x != 'function')
  29                         return x;
  30                     x = Cu.waiveXrays(x);
  31                     var rval = {};
  32                     if (typeof x == "function")
  33                         rval = eval(`(${x.toString()})`);
  34                     for (var i in x) {
  35                         if (x.__lookupGetter__(i))
  36                             rval.__defineGetter__(i, eval(`(${x.__lookupGetter__(i).toString()})`))
  37                         else
  38                             rval[i] = getCOW(x[i]);
  39                     }
  40                     return rval;
  41                 }
  42
  43                 // Give the sandbox a way to create ChromeObjectWrapped objects.
  44                 sandbox.getCOW = getCOW;
  45
  46                 // Define test API functions in the sandbox.
  47                 const TEST_API = ['is', 'ok', 'info'];
  48                 TEST_API.forEach(function (name) { sandbox[name] = window[name]; });
  49
  50
  51                 function COWTests() {
  52
  53                     var empty = {};
  54                     var cow = getCOW(empty);
  55
  56                     // Because private fields may not be enabled, we construct A via the below eval of an IFFE,
  57                     // and return early if it syntax errors.
  58                     var A;
  59                     try {
  60                         A = eval(`(function(){
  61                                     class Base {
  62                                         constructor(o) {
  63                                             return o;
  64                                         }
  65                                     };
  66
  67                                     class A extends Base {
  68                                         #x = 12;
  69                                         static gx(o) {
  70                                             return o.#x;
  71                                         }
  72
  73                                         static sx(o, v) {
  74                                             o.#x = v;
  75                                         }
  76                                     };
  77                                     return A;
  78                                 })();`);
  79                     } catch (e) {
  80                         is(e instanceof SyntaxError, true, "Syntax error: Private fields not enabled");
  81                         is(/private fields are not currently supported/.test(e.message), true, "correct message");
  82                         return;
  83                     }
  84
  85                     new A(empty);
  86                     is(A.gx(empty), 12, "Correct value read");
  87                     A.sx(empty, 'wrapped');
  88
  89                     function assertThrewInstance(f, error) {
  90                         var threw = true;
  91                         try {
  92                             f();
  93                             threw = false;
  94                         } catch (e) {
  95                             is(e instanceof error, true, "Correct Error");
  96                         }
  97                         is(threw, true, "Threw!");
  98                     }
  99
 100                     // Note: These throw warnings:
 101                     //
 102                     //   WARNING: Silently denied access to property ##x: Access to privileged JS object not permitted (@chrome://mochitests/content/chrome/js/xpconnect/tests/chrome/test_private_field_cows.xhtml:108:27): file /js/xpconnect/wrappers/XrayWrapper.cpp, line 226
 103                     //
 104                     // It's not clear to me if we ougth to wire this up to -not-? I suspect this is a result of invoking
 105                     // the has
 106                     assertThrewInstance(() => A.gx(cow), TypeError);
 107                     assertThrewInstance(() => A.sx(cow, 'unwrapped'), TypeError);
 108                     assertThrewInstance(() => new A(cow), Error);
 109                     assertThrewInstance(() => A.gx(cow), TypeError);
 110                 }
 111
 112                 // Stringify the COW test suite and directly evaluate it in the sandbox.
 113                 Cu.evalInSandbox('(' + COWTests.toString() + ')()', sandbox);
 114
 115                 // Test that COWed objects passing from content to chrome get unwrapped.
 116                 function returnCOW() {
 117                     return getCOW({
 118                         bar: 6
 119                     });
 120                 }
 121
 122                 // eslint-disable-next-line no-unused-vars
 123                 var unwrapped = Cu.evalInSandbox(
 124                     '(' + returnCOW.toString() + ')()',
 125                     sandbox
 126                 );
 127
 128                 ok(true, "passed");
 129             });
 130         ]]></script>
 131 </window>