Add m-esr52 at 52.6.0

1 files changed, 44 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Symbol/property-basics.js b/js/src/tests/ecma_6/Symbol/property-basics.js
new file mode 100644
index 000000000..63bcb3867
--- /dev/null
+++ b/js/src/tests/ecma_6/Symbol/property-basics.js
@@ -0,0 +1,44 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+var symbols = [
+    Symbol(),
+    Symbol("one"),
+    Symbol.for("two"),
+    Symbol.iterator,
+    Object(Symbol())
+];
+
+for (var sym of symbols) {
+    var obj = {};
+
+    // access a nonexistent property
+    assertEq(sym in obj, false);
+    assertEq(obj.hasOwnProperty(sym), false);
+    assertEq(obj[sym], undefined);
+    assertEq(typeof obj[sym], "undefined");
+    assertEq(Object.getOwnPropertyDescriptor(obj, sym), undefined);
+
+    // assign, then try accessing again
+    obj[sym] = "ok";
+    assertEq(sym in obj, true);
+    assertEq(obj.hasOwnProperty(sym), true);
+    assertEq(obj[sym], "ok");
+    assertDeepEq(Object.getOwnPropertyDescriptor(obj, sym), {
+        value: "ok",
+        writable: true,
+        enumerable: true,
+        configurable: true
+    });
+
+    // assign again, observe value is overwritten
+    obj[sym] = 12;
+    assertEq(obj[sym], 12);
+
+    // increment
+    assertEq(obj[sym]++, 12);
+    assertEq(obj[sym], 13);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);