1 files changed, 133 insertions, 0 deletions
diff --git a/spec/frontend/sidebar/components/assignees/assignee_title_spec.js b/spec/frontend/sidebar/components/assignees/assignee_title_spec.js
new file mode 100644
index 00000000000..14a6bdbf907
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+++ b/spec/frontend/sidebar/components/assignees/assignee_title_spec.js
@@ -0,0 +1,133 @@
+import { GlLoadingIcon } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import { mockTracking, triggerEvent } from 'helpers/tracking_helper';
+import Component from '~/sidebar/components/assignees/assignee_title.vue';
+
+describe('AssigneeTitle component', () => {
+  let wrapper;
+
+  const createComponent = (props) => {
+    return shallowMount(Component, {
+      propsData: {
+        numberOfAssignees: 0,
+        editable: false,
+        changing: false,
+        ...props,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  describe('assignee title', () => {
+    it('renders assignee', () => {
+      wrapper = createComponent({
+        numberOfAssignees: 1,
+        editable: false,
+      });
+
+      expect(wrapper.vm.$el.innerText.trim()).toEqual('Assignee');
+    });
+
+    it('renders 2 assignees', () => {
+      wrapper = createComponent({
+        numberOfAssignees: 2,
+        editable: false,
+      });
+
+      expect(wrapper.vm.$el.innerText.trim()).toEqual('2 Assignees');
+    });
+  });
+
+  describe('gutter toggle', () => {
+    it('does not show toggle by default', () => {
+      wrapper = createComponent({
+        numberOfAssignees: 2,
+        editable: false,
+      });
+
+      expect(wrapper.vm.$el.querySelector('.gutter-toggle')).toBeNull();
+    });
+
+    it('shows toggle when showToggle is true', () => {
+      wrapper = createComponent({
+        numberOfAssignees: 2,
+        editable: false,
+        showToggle: true,
+      });
+
+      expect(wrapper.vm.$el.querySelector('.gutter-toggle')).toEqual(expect.any(Object));
+    });
+  });
+
+  describe('when changing is false', () => {
+    it('renders "Edit"', () => {
+      wrapper = createComponent({ editable: true });
+
+      expect(wrapper.find('[data-test-id="edit-link"]').text()).toEqual('Edit');
+    });
+  });
+
+  describe('when changing is true', () => {
+    it('renders "Edit"', () => {
+      wrapper = createComponent({ editable: true, changing: true });
+
+      expect(wrapper.find('[data-test-id="edit-link"]').text()).toEqual('Apply');
+    });
+  });
+
+  it('does not render spinner by default', () => {
+    wrapper = createComponent({
+      numberOfAssignees: 0,
+      editable: false,
+    });
+
+    expect(wrapper.findComponent(GlLoadingIcon).exists()).toBe(false);
+  });
+
+  it('renders spinner when loading', () => {
+    wrapper = createComponent({
+      loading: true,
+      numberOfAssignees: 0,
+      editable: false,
+    });
+
+    expect(wrapper.findComponent(GlLoadingIcon).exists()).toBe(true);
+  });
+
+  it('does not render edit link when not editable', () => {
+    wrapper = createComponent({
+      numberOfAssignees: 0,
+      editable: false,
+    });
+
+    expect(wrapper.vm.$el.querySelector('.edit-link')).toBeNull();
+  });
+
+  it('renders edit link when editable', () => {
+    wrapper = createComponent({
+      numberOfAssignees: 0,
+      editable: true,
+    });
+
+    expect(wrapper.vm.$el.querySelector('.edit-link')).not.toBeNull();
+  });
+
+  it('tracks the event when edit is clicked', () => {
+    wrapper = createComponent({
+      numberOfAssignees: 0,
+      editable: true,
+    });
+
+    const spy = mockTracking('_category_', wrapper.element, jest.spyOn);
+    triggerEvent('.js-sidebar-dropdown-toggle');
+
+    expect(spy).toHaveBeenCalledWith('_category_', 'click_edit_button', {
+      label: 'right_sidebar',
+      property: 'assignee',
+    });
+  });
+});