1 files changed, 25 insertions, 0 deletions
diff --git a/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.toString.js b/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.toString.js
index caeac0c9ac..1fd946df01 100644
--- a/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.toString.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.toString.js
@@ -1,3 +1,28 @@
 test("length is 0", () => {
     expect(Intl.Locale.prototype.toString).toHaveLength(0);
 });
+
+test("normal behavior", () => {
+    const en1 = new Intl.Locale("en");
+    expect(en1.toString()).toBe("en");
+
+    const en2 = new Intl.Locale("en-Latn");
+    expect(en2.toString()).toBe("en-Latn");
+
+    const en3 = new Intl.Locale("en-US");
+    expect(en3.toString()).toBe("en-US");
+
+    const en4 = new Intl.Locale("en", { language: "es" });
+    expect(en4.toString()).toBe("es");
+
+    const en5 = new Intl.Locale("en", { script: "Latn" });
+    expect(en5.toString()).toBe("en-Latn");
+
+    const en6 = new Intl.Locale("en", { script: "Latn", region: "US" });
+    expect(en6.toString()).toBe("en-Latn-US");
+});
+
+test("string is canonicalized behavior", () => {
+    const en = new Intl.Locale("EN", { script: "lAtN", region: "us" });
+    expect(en.toString()).toBe("en-Latn-US");
+});