Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Tests/builtins/Promise/Promise.resolve.js

@@ -0,0 +1,41 @@
+test("length is 1", () => {
+    expect(Promise.resolve).toHaveLength(1);
+});
+
+describe("normal behavior", () => {
+    test("returns a Promise", () => {
+        const resolvedPromise = Promise.resolve();
+        expect(resolvedPromise).toBeInstanceOf(Promise);
+    });
+
+    test("returned Promise is resolved with given argument", () => {
+        let fulfillmentValue = null;
+        Promise.resolve("Some value").then(value => {
+            fulfillmentValue = value;
+        });
+        runQueuedPromiseJobs();
+        expect(fulfillmentValue).toBe("Some value");
+    });
+
+    test("works with subclasses", () => {
+        class CustomPromise extends Promise {}
+
+        const resolvedPromise = CustomPromise.resolve("Some value");
+        expect(resolvedPromise).toBeInstanceOf(CustomPromise);
+
+        let fulfillmentValue = null;
+        resolvedPromise.then(value => {
+            fulfillmentValue = value;
+        });
+        runQueuedPromiseJobs();
+        expect(fulfillmentValue).toBe("Some value");
+    });
+});
+
+describe("errors", () => {
+    test("this value must be an object", () => {
+        expect(() => {
+            Promise.resolve.call("foo");
+        }).toThrowWithMessage(TypeError, "foo is not an object");
+    });
+});