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/Function/Function.js

@@ -0,0 +1,63 @@
+describe("correct behavior", () => {
+    test("constructor properties", () => {
+        expect(Function).toHaveLength(1);
+        expect(Function.name).toBe("Function");
+        expect(Function.prototype).toHaveLength(0);
+        expect(Function.prototype.name).toBe("");
+    });
+
+    test("typeof", () => {
+        expect(typeof Function()).toBe("function");
+        expect(typeof new Function()).toBe("function");
+    });
+
+    test("basic functionality", () => {
+        expect(Function()()).toBeUndefined();
+        expect(new Function()()).toBeUndefined();
+        expect(Function("return 42")()).toBe(42);
+        expect(new Function("return 42")()).toBe(42);
+        expect(new Function("foo", "return foo")(42)).toBe(42);
+        expect(new Function("foo,bar", "return foo + bar")(1, 2)).toBe(3);
+        expect(new Function("foo", "bar", "return foo + bar")(1, 2)).toBe(3);
+        expect(new Function("foo", "bar,baz", "return foo + bar + baz")(1, 2, 3)).toBe(6);
+        expect(new Function("foo", "bar", "baz", "return foo + bar + baz")(1, 2, 3)).toBe(6);
+        expect(new Function("foo", "if (foo) { return 42; } else { return 'bar'; }")(true)).toBe(
+            42
+        );
+        expect(new Function("foo", "if (foo) { return 42; } else { return 'bar'; }")(false)).toBe(
+            "bar"
+        );
+        expect(new Function("return typeof Function()")()).toBe("function");
+        expect(new Function("x", "return function (y) { return x + y };")(1)(2)).toBe(3);
+
+        expect(new Function("-->")()).toBeUndefined();
+
+        expect(new Function().name).toBe("anonymous");
+        expect(new Function().toString()).toBe("function anonymous(\n) {\n\n}");
+    });
+});
+
+describe("errors", () => {
+    test("syntax error", () => {
+        expect(() => {
+            new Function("[");
+        })
+            // This might be confusing at first but keep in mind it's actually parsing
+            // function anonymous() { [ }
+            // Since the body, surrounded by a newline on each side, is first parsed standalone,
+            // we report unexpected token EOF instead of }.
+            // FIXME: The position is odd though, I'd expect `line: 2, column: 2` and `line: 3, column: 1`...
+            // > eval("\n[")   // Uncaught exception: [SyntaxError] Unexpected token Eof. Expected BracketClose (line: 2, column: 2)
+            // > eval("\n[\n") // Uncaught exception: [SyntaxError] Unexpected token Eof. Expected BracketClose (line: 2, column: 3)
+            .toThrowWithMessage(
+                SyntaxError,
+                "Unexpected token Eof. Expected BracketClose (line: 2, column: 3)"
+            );
+    });
+
+    test("parameters and body must be valid standalone", () => {
+        expect(() => {
+            new Function("/*", "*/ ) {");
+        }).toThrowWithMessage(SyntaxError, "Unterminated multi-line comment (line: 1, column: 3)");
+    });
+});