LibJS: Move tests to /Tests/LibJS

Author: https://github.com/gmta
Commit: https://github.com/LadybirdBrowser/ladybird/commit/e3faa9b5add
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/7572
Reviewed-by: https://github.com/trflynn89 ✅

Tests/LibJS/Runtime/builtins/Array/Array.of.js

@@ -0,0 +1,59 @@
+test("length is 0", () => {
+    expect(Array.of).toHaveLength(0);
+});
+
+describe("normal behavior", () => {
+    test("single numeric argument", () => {
+        var a = Array.of(5);
+        expect(a instanceof Array).toBeTrue();
+        expect(a).toHaveLength(1);
+        expect(a[0]).toBe(5);
+    });
+
+    test("single non-numeric argument", () => {
+        var a = Array.of("5");
+        expect(a instanceof Array).toBeTrue();
+        expect(a).toHaveLength(1);
+        expect(a[0]).toBe("5");
+    });
+
+    test("single infinite numeric argument", () => {
+        var a = Array.of(Infinity);
+        expect(a instanceof Array).toBeTrue();
+        expect(a).toHaveLength(1);
+        expect(a[0]).toBe(Infinity);
+    });
+
+    test("multiple numeric arguments", () => {
+        var a = Array.of(1, 2, 3);
+        expect(a instanceof Array).toBeTrue();
+        expect(a).toHaveLength(3);
+        expect(a[0]).toBe(1);
+        expect(a[1]).toBe(2);
+        expect(a[2]).toBe(3);
+    });
+
+    test("single array argument", () => {
+        var a = Array.of([1, 2, 3]);
+        expect(a instanceof Array).toBeTrue();
+        expect(a).toHaveLength(1);
+        expect(a[0][0]).toBe(1);
+        expect(a[0][1]).toBe(2);
+        expect(a[0][2]).toBe(3);
+    });
+
+    test("getter property is included in returned array", () => {
+        var t = [1, 2, 3];
+        Object.defineProperty(t, 3, {
+            get() {
+                return 4;
+            },
+        });
+        var a = Array.of(...t);
+        expect(a).toHaveLength(4);
+        expect(a[0]).toBe(1);
+        expect(a[1]).toBe(2);
+        expect(a[2]).toBe(3);
+        expect(a[3]).toBe(4);
+    });
+});