1 files changed, 39 insertions, 0 deletions
diff --git a/Libraries/LibJS/Tests/Object.defineProperty.js b/Libraries/LibJS/Tests/Object.defineProperty.js
new file mode 100644
index 0000000000..4f3b7049a6
--- /dev/null
+++ b/Libraries/LibJS/Tests/Object.defineProperty.js
@@ -0,0 +1,39 @@
+function assert(x) { if (!x) throw 1; }
+
+try {
+
+    var o = {};
+    Object.defineProperty(o, "foo", { value: 1, writable: false, enumerable: false });
+
+    assert(o.foo === 1);
+    o.foo = 2;
+    assert(o.foo === 1);
+
+    var d = Object.getOwnPropertyDescriptor(o, "foo");
+    assert(d.configurable === false);
+    assert(d.enumerable === false);
+    assert(d.writable === false);
+    assert(d.value === 1);
+
+    Object.defineProperty(o, "bar", { value: "hi", writable: true, enumerable: true });
+
+    assert(o.bar === "hi");
+    o.bar = "ho";
+    assert(o.bar === "ho");
+
+    d = Object.getOwnPropertyDescriptor(o, "bar");
+    assert(d.configurable === false);
+    assert(d.enumerable === true);
+    assert(d.writable === true);
+    assert(d.value === "ho");
+
+    try {
+        Object.defineProperty(o, "bar", { value: "xx", enumerable: false });
+    } catch (e) {
+        assert(e.name === "TypeError");
+    }
+
+    console.log("PASS");
+} catch (e) {
+    console.log(e)
+}