Improve repeating events handling

test/content/events.test.js

@@ -0,0 +1,40 @@
+import { getRepeatingEvents } from '../../website/common/script/content/constants/events';
+
+describe.only('events', () => {
+  let clock;
+
+  afterEach(() => {
+    if (clock) {
+      clock.restore();
+    }
+  });
+
+  it('returns empty array when no events are active', () => {
+    clock = sinon.useFakeTimers(new Date('2024-01-06'));
+    const events = getRepeatingEvents();
+    expect(events).to.be.empty;
+  });
+
+  it('returns events when active', () => {
+    clock = sinon.useFakeTimers(new Date('2024-01-31'));
+    const events = getRepeatingEvents();
+    expect(events).to.have.length(1);
+    expect(events[0].key).to.equal('birthday');
+    expect(events[0].end).to.be.greaterThan(new Date());
+    expect(events[0].start).to.be.lessThan(new Date());
+  });
+
+  it('returns nye event at beginning of the year', () => {
+    clock = sinon.useFakeTimers(new Date('2025-01-01'));
+    const events = getRepeatingEvents();
+    expect(events).to.have.length(1);
+    expect(events[0].key).to.equal('nye');
+  });
+
+  it('returns nye event at end of the year', () => {
+    clock = sinon.useFakeTimers(new Date('2024-12-30'));
+    const events = getRepeatingEvents();
+    expect(events).to.have.length(1);
+    expect(events[0].key).to.equal('nye');
+  });
+});