LibJS: Implement RegExp.prototype.toString() as standalone function

This should not just inherit Object.prototype.toString() (and override
Object::to_string()) but be its own function, i.e.
'RegExp.prototype.toString !== Object.prototype.toString'.

1 files changed, 5 insertions, 0 deletions

diff --git a/Libraries/LibJS/Tests/builtins/RegExp/RegExp.prototype.toString.js b/Libraries/LibJS/Tests/builtins/RegExp/RegExp.prototype.toString.js
new file mode 100644
index 0000000000..5185fcc036
--- /dev/null
+++ b/Libraries/LibJS/Tests/builtins/RegExp/RegExp.prototype.toString.js
@@ -0,0 +1,5 @@
+test("basic functionality", () => {
+    expect(RegExp.prototype.toString).toHaveLength(0);
+
+    expect(/test/g.toString()).toBe("/test/g");
+});