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/AsyncDisposableStack/AsyncDisposableStack.js

@@ -0,0 +1,18 @@
+test("constructor properties", () => {
+    expect(AsyncDisposableStack).toHaveLength(0);
+    expect(AsyncDisposableStack.name).toBe("AsyncDisposableStack");
+});
+
+describe("errors", () => {
+    test("called without new", () => {
+        expect(() => {
+            AsyncDisposableStack();
+        }).toThrowWithMessage(TypeError, "AsyncDisposableStack constructor must be called with 'new'");
+    });
+});
+
+describe("normal behavior", () => {
+    test("typeof", () => {
+        expect(typeof new AsyncDisposableStack()).toBe("object");
+    });
+});