LibJS: Reorganize tests into subfolders

Libraries/LibJS/Tests/builtins/Object/Object.getOwnPropertyDescriptor.js

@@ -0,0 +1,51 @@
+load("test-common.js");
+
+try {
+    let o = {
+        foo: "bar",
+        get x() { },
+        set ["hi" + 1](_) { },
+    };
+
+    Object.defineProperty(o, "baz", {
+        enumerable: false,
+        writable: true,
+        value: 10,
+    });
+
+    let d = Object.getOwnPropertyDescriptor(o, "foo");
+    assert(d.enumerable === true);
+    assert(d.configurable === true);
+    assert(d.writable === true);
+    assert(d.value === "bar");
+    assert(d.get === undefined);
+    assert(d.set === undefined);
+
+    let d = Object.getOwnPropertyDescriptor(o, "x");
+    assert(d.enumerable === true);
+    assert(d.configurable === true);
+    assert(d.writable === undefined);
+    assert(d.value === undefined);
+    assert(typeof d.get === "function");
+    assert(d.set === undefined);
+
+    let d = Object.getOwnPropertyDescriptor(o, "hi1");
+    assert(d.enumerable === true);
+    assert(d.configurable === true);
+    assert(d.writable === undefined);
+    assert(d.value === undefined);
+    assert(d.get === undefined);
+    assert(typeof d.set === "function");
+
+    let d = Object.getOwnPropertyDescriptor(o, "baz");
+    assert(d.enumerable === false);
+    assert(d.configurable === false);
+    assert(d.writable === true);
+    assert(d.value === 10);
+    assert(d.get === undefined);
+    assert(d.set === undefined);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}