LibJS: Implement Temporal.TimeZone.prototype.getNextTransition()

1 files changed, 25 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Tests/builtins/Temporal/TimeZone/TimeZone.prototype.getNextTransition.js b/Userland/Libraries/LibJS/Tests/builtins/Temporal/TimeZone/TimeZone.prototype.getNextTransition.js
new file mode 100644
index 0000000000..d92abb3111
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Temporal/TimeZone/TimeZone.prototype.getNextTransition.js
@@ -0,0 +1,25 @@
+describe("correct behavior", () => {
+    test("length is 1", () => {
+        expect(Temporal.TimeZone.prototype.getNextTransition).toHaveLength(1);
+    });
+
+    test("basic functionality", () => {
+        const timeZone = new Temporal.TimeZone("UTC");
+        const instant = new Temporal.Instant(0n);
+        expect(timeZone.getNextTransition(instant)).toBeNull();
+    });
+
+    test("custom offset", () => {
+        const timeZone = new Temporal.TimeZone("+01:30");
+        const instant = new Temporal.Instant(0n);
+        expect(timeZone.getNextTransition(instant)).toBeNull();
+    });
+});
+
+describe("errors", () => {
+    test("this value must be a Temporal.TimeZone object", () => {
+        expect(() => {
+            Temporal.TimeZone.prototype.getNextTransition.call("foo");
+        }).toThrowWithMessage(TypeError, "Not an object of type Temporal.TimeZone");
+    });
+});