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/functions/function-rest-params.js

@@ -0,0 +1,47 @@
+test("rest parameter with no arguments", () => {
+    function foo(...a) {
+        expect(a).toBeInstanceOf(Array);
+        expect(a).toHaveLength(0);
+    }
+    foo();
+});
+
+test("rest parameter with arguments", () => {
+    function foo(...a) {
+        expect(a).toEqual(["foo", 123, undefined, { foo: "bar" }]);
+    }
+    foo("foo", 123, undefined, { foo: "bar" });
+});
+
+test("rest parameter after normal parameters with no arguments", () => {
+    function foo(a, b, ...c) {
+        expect(a).toBe("foo");
+        expect(b).toBe(123);
+        expect(c).toEqual([]);
+    }
+    foo("foo", 123);
+});
+
+test("rest parameter after normal parameters with arguments", () => {
+    function foo(a, b, ...c) {
+        expect(a).toBe("foo");
+        expect(b).toBe(123);
+        expect(c).toEqual([undefined, { foo: "bar" }]);
+    }
+    foo("foo", 123, undefined, { foo: "bar" });
+});
+
+test("basic arrow function rest parameters", () => {
+    let foo = (...a) => {
+        expect(a).toBeInstanceOf(Array);
+        expect(a).toHaveLength(0);
+    };
+    foo();
+
+    foo = (a, b, ...c) => {
+        expect(a).toBe("foo");
+        expect(b).toBe(123);
+        expect(c).toEqual([undefined, { foo: "bar" }]);
+    };
+    foo("foo", 123, undefined, { foo: "bar" });
+});