Add m-esr52 at 52.6.0

1 files changed, 35 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Symbol/constructor.js b/js/src/tests/ecma_6/Symbol/constructor.js
new file mode 100644
index 000000000..5143b02a9
--- /dev/null
+++ b/js/src/tests/ecma_6/Symbol/constructor.js
@@ -0,0 +1,35 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+// Symbol(symbol) throws a TypeError.
+var sym = Symbol();
+assertThrowsInstanceOf(() => Symbol(sym), TypeError);
+
+// Symbol(undefined) is equivalent to Symbol().
+assertEq(Symbol(undefined).toString(), "Symbol()");
+
+// Otherwise, Symbol(v) means Symbol(ToString(v)).
+assertEq(Symbol(7).toString(), "Symbol(7)");
+assertEq(Symbol(true).toString(), "Symbol(true)");
+assertEq(Symbol(null).toString(), "Symbol(null)");
+assertEq(Symbol([1, 2]).toString(), "Symbol(1,2)");
+var symobj = Object(sym);
+assertThrowsInstanceOf(() => Symbol(symobj), TypeError);
+
+var hits = 0;
+var obj = {
+    toString: function () {
+        hits++;
+        return "ponies";
+    }
+};
+assertEq(Symbol(obj).toString(), "Symbol(ponies)");
+assertEq(hits, 1);
+
+assertEq(Object.getPrototypeOf(Symbol.prototype), Object.prototype);
+
+// Symbol.prototype is not itself a Symbol object.
+assertThrowsInstanceOf(() => Symbol.prototype.valueOf(), TypeError);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);