1 files changed, 29 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_allowWaivers.js b/js/xpconnect/tests/unit/test_allowWaivers.js
new file mode 100644
index 0000000000..b5a764e352
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_allowWaivers.js
@@ -0,0 +1,29 @@
+function checkWaivers(from, allowed) {
+  var sb = new Cu.Sandbox('http://example.com');
+  from.test = sb.eval('var o = {prop: 2, f: function() {return 42;}}; o');
+
+  // Make sure that |from| has Xrays to sb.
+  Assert.equal(from.eval('test.prop'), 2);
+  Assert.equal(from.eval('test.f'), undefined);
+
+  // Make sure that waivability works as expected.
+  Assert.equal(from.eval('!!test.wrappedJSObject'), allowed);
+  Assert.equal(from.eval('XPCNativeWrapper.unwrap(test) !== test'), allowed);
+
+  // Make a sandbox with the same principal as |from|, but without any waiver
+  // restrictions, and make sure that the waiver does not transfer.
+  var friend = new Cu.Sandbox(Cu.getObjectPrincipal(from));
+  friend.test = from.test;
+  friend.eval('var waived = test.wrappedJSObject;');
+  Assert.equal(friend.eval('waived.f()'), 42);
+  friend.from = from;
+  friend.eval('from.waived = waived');
+  Assert.equal(from.eval('!!waived.f'), allowed);
+}
+
+function run_test() {
+  checkWaivers(new Cu.Sandbox('http://example.com'), true);
+  checkWaivers(new Cu.Sandbox('http://example.com', {allowWaivers: false}), false);
+  checkWaivers(new Cu.Sandbox(['http://example.com']), true);
+  checkWaivers(new Cu.Sandbox(['http://example.com'], {allowWaivers: false}), false);
+}