Add m-esr52 at 52.6.0

1 files changed, 45 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyRevoke.js b/js/src/jit-test/tests/proxy/testDirectProxyRevoke.js
new file mode 100644
index 000000000..420fe3eaf
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyRevoke.js
@@ -0,0 +1,45 @@
+load(libdir + "asserts.js");
+
+// Test for various properties demanded of Proxy.revocable
+var holder = Proxy.revocable({}, {});
+
+// The returned object must inherit from Object.prototype
+assertEq(Object.getPrototypeOf(holder), Object.prototype);
+
+assertDeepEq(Object.getOwnPropertyNames(holder), [ 'proxy', 'revoke' ]);
+
+// The revocation function must inherit from Function.prototype
+assertEq(Object.getPrototypeOf(holder.revoke), Function.prototype);
+
+// Proxy.revoke should return unique objects from the same opcode call.
+var proxyLog = []
+var revokerLog = []
+var holderLog = []
+
+function addUnique(l, v)
+{
+    assertEq(l.indexOf(v), -1);
+    l.push(v);
+}
+
+for (let i = 0; i < 5; i++) {
+    holder = Proxy.revocable({}, {});
+    addUnique(holderLog, holder);
+    addUnique(revokerLog, holder.revoke);
+    addUnique(proxyLog, holder.proxy);
+}
+
+// The provided revoke function should revoke only the 1 proxy
+var p = proxyLog.pop();
+var r = revokerLog.pop();
+
+// Works before, but not after. This is mostly a token. There are
+// testDirectProxy* tests to check each trap revokes properly.
+p.foo;
+assertEq(r(), undefined, "Revoke trap must return undefined");
+assertThrowsInstanceOf(() => p.foo, TypeError);
+assertEq(r(), undefined, "Revoke trap must return undefined");
+
+// None of this should throw, since these proxies are unrevoked.
+for (let i = 0; i < proxyLog.length; i++)
+    proxyLog[i].foo;