Test that snowplow is called with the correct information

spec/frontend/notes/components/discussion_jump_to_next_button_spec.js

 import { shallowMount } from '@vue/test-utils';
 import JumpToNextDiscussionButton from '~/notes/components/discussion_jump_to_next_button.vue';
+import { mockTracking } from '../../helpers/tracking_helper';
 
 describe('JumpToNextDiscussionButton', () => {
-  let wrapper;
   const fromDiscussionId = 'abc123';
+  let wrapper;
+  let trackingSpy;
+  let jumpFn;
 
   beforeEach(() => {
+    jumpFn = jest.fn();
     wrapper = shallowMount(JumpToNextDiscussionButton, {
       propsData: { fromDiscussionId },
     });
+    wrapper.setMethods({ jumpToNextRelativeDiscussion: jumpFn });
+
+    trackingSpy = mockTracking('_category_', wrapper.element, jest.spyOn);
   });
 
   afterEach(() => {
@@ -20,9 +27,17 @@ describe('JumpToNextDiscussionButton', () => {
   });
 
   it('calls jumpToNextRelativeDiscussion when clicked', () => {
-    const jumpToNextRelativeDiscussion = jest.fn();
-    wrapper.setMethods({ jumpToNextRelativeDiscussion });
     wrapper.find({ ref: 'button' }).trigger('click');
-    expect(jumpToNextRelativeDiscussion).toHaveBeenCalledWith(fromDiscussionId);
+
+    expect(jumpFn).toHaveBeenCalledWith(fromDiscussionId);
+  });
+
+  it('sends the correct tracking event when clicked', () => {
+    wrapper.find({ ref: 'button' }).trigger('click');
+
+    expect(trackingSpy).toHaveBeenCalledWith('_category_', 'click_button', {
+      label: 'mr_next_unresolved_thread',
+      property: 'click_next_unresolved_thread',
+    });
   });
 });