LibJS: Reorganize tests into subfolders

Libraries/LibJS/Tests/builtins/Array/Array.js

@@ -0,0 +1,48 @@
+load("test-common.js");
+
+try {
+    assert(Array.length === 1);
+    assert(Array.name === "Array");
+    assert(Array.prototype.length === 0);
+
+    assert(typeof Array() === "object");
+    assert(typeof new Array() === "object");
+
+    var a;
+
+    a = new Array(5);
+    assert(a.length === 5);
+
+    a = new Array("5");
+    assert(a.length === 1);
+    assert(a[0] === "5");
+
+    a = new Array(1, 2, 3);
+    assert(a.length === 3);
+    assert(a[0] === 1);
+    assert(a[1] === 2);
+    assert(a[2] === 3);
+
+    a = new Array([1, 2, 3]);
+    assert(a.length === 1);
+    assert(a[0][0] === 1);
+    assert(a[0][1] === 2);
+    assert(a[0][2] === 3);
+
+    a = new Array(1, 2, 3);
+    Object.defineProperty(a, 3, { get() { return 10; } });
+    assert(a.toString() === "1,2,3,10");
+
+    [-1, -100, -0.1, 0.1, 1.23, Infinity, -Infinity, NaN].forEach(value => {
+        assertThrowsError(() => {
+            new Array(value);
+        }, {
+            error: TypeError,
+            message: "Invalid array length"
+        });
+    });
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}