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/functions/isNaN.js

@@ -0,0 +1,26 @@
+test("length is 1", () => {
+    expect(isNaN).toHaveLength(1);
+});
+
+test("arguments that evaluate to false", () => {
+    expect(isNaN(0)).toBeFalse();
+    expect(isNaN(42)).toBeFalse();
+    expect(isNaN("")).toBeFalse();
+    expect(isNaN("0")).toBeFalse();
+    expect(isNaN("42")).toBeFalse();
+    expect(isNaN(true)).toBeFalse();
+    expect(isNaN(false)).toBeFalse();
+    expect(isNaN(null)).toBeFalse();
+    expect(isNaN([])).toBeFalse();
+    expect(isNaN(Infinity)).toBeFalse();
+    expect(isNaN(-Infinity)).toBeFalse();
+});
+
+test("arguments that evaluate to true", () => {
+    expect(isNaN()).toBeTrue();
+    expect(isNaN(NaN)).toBeTrue();
+    expect(isNaN(undefined)).toBeTrue();
+    expect(isNaN("foo")).toBeTrue();
+    expect(isNaN({})).toBeTrue();
+    expect(isNaN([1, 2, 3])).toBeTrue();
+});