LibJS: Implement a nearly empty Intl.ListFormat object

This adds plumbing for the Intl.ListFormat object, constructor, and
prototype.

2 files changed, 16 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Tests/builtins/Intl/ListFormat/ListFormat.@@toStringTag.js b/Userland/Libraries/LibJS/Tests/builtins/Intl/ListFormat/ListFormat.@@toStringTag.js
new file mode 100644
index 0000000000..4a1c258316
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/ListFormat/ListFormat.@@toStringTag.js
@@ -0,0 +1,3 @@
+test("basic functionality", () => {
+    expect(Intl.ListFormat.prototype[Symbol.toStringTag]).toBe("Intl.ListFormat");
+});
diff --git a/Userland/Libraries/LibJS/Tests/builtins/Intl/ListFormat/ListFormat.js b/Userland/Libraries/LibJS/Tests/builtins/Intl/ListFormat/ListFormat.js
new file mode 100644
index 0000000000..9f0ac10931
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/ListFormat/ListFormat.js
@@ -0,0 +1,13 @@
+describe("errors", () => {
+    test("called without new", () => {
+        expect(() => {
+            Intl.ListFormat();
+        }).toThrowWithMessage(TypeError, "Intl.ListFormat constructor must be called with 'new'");
+    });
+});
+
+describe("normal behavior", () => {
+    test("length is 0", () => {
+        expect(Intl.ListFormat).toHaveLength(0);
+    });
+});