Added unit test to ActiveChallengeDisplay component

src/components/__tests__/ActiveChallengeDisplay.spec.ts

+import { mount } from '@vue/test-utils';
+import ActiveChallengeDisplay from '@/components/challenge/ActiveChallengeDisplay.vue';
+import { describe, it, expect } from 'vitest'
+
+describe('MyComponent', () => {
+  it('emits challengeCompleted when complete button is clicked', async () => {
+    const challenge = {
+      challengeId: 1,
+      challengeTitle: 'Test Challenge',
+      challengeDescription: 'Description of test challenge',
+      goalSum: 100,
+      expirationDate: '2024-05-01'
+    };
+
+    const wrapper = mount(ActiveChallengeDisplay, {
+      props: {
+        challenge
+      }
+    });
+
+    await wrapper.find('.complete-button').trigger('click');
+
+    expect(wrapper.emitted('challengeCompleted')).toBeTruthy();
+    expect(wrapper.emitted('challengeCompleted')[0][0]).toBe(challenge.challengeId);
+  });
+
+  it('emits challengeDeleted when delete button is clicked', async () => {
+    const challenge = {
+      challengeId: 1,
+      challengeTitle: 'Test Challenge',
+      challengeDescription: 'Description of test challenge',
+      goalSum: 100,
+      expirationDate: '2024-05-01'
+    };
+
+    const wrapper = mount(ActiveChallengeDisplay, {
+      props: {
+        challenge
+      }
+    });
+
+    await wrapper.find('.close-img').trigger('click');
+
+    expect(wrapper.emitted('challengeDeleted')).toBeTruthy();
+    expect(wrapper.emitted('challengeDeleted')[0][0]).toBe(challenge.challengeId);
+  });
+
+  it('displays correct challenge information', () => {
+    const challenge = {
+      challengeId: 1,
+      challengeTitle: 'Test Challenge',
+      challengeDescription: 'Description of test challenge',
+      goalSum: 100,
+      expirationDate: '2024-05-01'
+    };
+
+    const wrapper = mount(ActiveChallengeDisplay, {
+      props: {
+        challenge
+      }
+    });
+
+    expect(wrapper.text()).toContain(challenge.challengeTitle);
+    expect(wrapper.text()).toContain(challenge.challengeDescription);
+    expect(wrapper.text()).toContain('Utløpsdato: 01/05/2024');
+    expect(wrapper.text()).toContain('Sparesum: 100 kr,-');
+  });
+});