Add m-esr52 at 52.6.0

1 files changed, 36 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Symbol/realms.js b/js/src/tests/ecma_6/Symbol/realms.js
new file mode 100644
index 000000000..98a1284ee
--- /dev/null
+++ b/js/src/tests/ecma_6/Symbol/realms.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+// Symbols can be shared across realms.
+
+if (typeof Reflect !== "undefined" && typeof Reflect.Realm === "function") {
+    throw new Error("Congratulations on implementing Reflect.Realm! " +
+                    "Please update this test to use it.");
+}
+if (typeof newGlobal === "function") {
+    var g = newGlobal();
+    var gj = g.eval("jones = Symbol('jones')");
+    assertEq(typeof gj, "symbol");
+    assertEq(g.jones, g.jones);
+    assertEq(gj, g.jones);
+    assertEq(gj !== Symbol("jones"), true);
+
+    // A symbol can be round-tripped to another realm and back;
+    // the result is the original symbol.
+    var smith = Symbol("smith");
+    g.smith = smith;  // put smith into the realm
+    assertEq(g.smith, smith);  // pull it back out
+
+    // Spot-check that non-generic methods can be applied to symbols and Symbol
+    // objects from other realms.
+    assertEq(Symbol.prototype.toString.call(gj), "Symbol(jones)");
+    assertEq(Symbol.prototype.toString.call(g.eval("Object(Symbol('brown'))")),
+             "Symbol(brown)");
+
+    // Symbol.for functions share a symbol registry across all realms.
+    assertEq(g.Symbol.for("ponies"), Symbol.for("ponies"));
+    assertEq(g.eval("Symbol.for('rainbows')"), Symbol.for("rainbows"));
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);