LibJS: Reorganize tests into subfolders

Libraries/LibJS/Tests/builtins/Array/array-basic.js

@@ -0,0 +1,63 @@
+load("test-common.js");
+
+try {
+    var a = [1, 2, 3];
+
+    assert(typeof a === "object");
+    assert(a.length === 3);
+    assert(a[0] === 1);
+    assert(a[1] === 2);
+    assert(a[2] === 3);
+
+    a[1] = 5;
+    assert(a[1] === 5);
+    assert(a.length === 3);
+
+    a.push(7);
+    assert(a[3] === 7);
+    assert(a.length === 4);
+
+    a = [,];
+    assert(a.length === 1);
+    assert(a.toString() === "");
+    assert(a[0] === undefined);
+
+    a = [,,,,];
+    assert(a.length === 4);
+    assert(a.toString() === ",,,");
+    assert(a[0] === undefined);
+    assert(a[1] === undefined);
+    assert(a[2] === undefined);
+    assert(a[3] === undefined);
+
+    a = [1,,2,,,3,];
+    assert(a.length === 6);
+    assert(a.toString() === "1,,2,,,3");
+    assert(a[0] === 1);
+    assert(a[1] === undefined);
+    assert(a[2] === 2);
+    assert(a[3] === undefined);
+    assert(a[4] === undefined);
+    assert(a[5] === 3);
+
+    a = [1,,2,,,3,];
+    Object.defineProperty(a, 1, {
+        get() {
+            return this.secret_prop;
+        },
+        set(value) {
+            this.secret_prop = value;
+        },
+    });
+    assert(a.length === 6);
+    assert(a.toString() === "1,,2,,,3");
+    assert(a.secret_prop === undefined);
+    a[1] = 20;
+    assert(a.length === 6);
+    assert(a.toString() === "1,20,2,,,3");
+    assert(a.secret_prop === 20);
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}