text: import Vue from 'vue';
  
  import dropdownValueComponent from '~/vue_shared/components/sidebar/labels_select/dropdown_value.vue';
  
  import { mockConfig, mockLabels } from './mock_data';
  
  import mountComponent from '../../../../helpers/vue_mount_component_helper';
  
  const createComponent = (
    labels = mockLabels,
    labelFilterBasePath = mockConfig.labelFilterBasePath,
  ) => {
    const Component = Vue.extend(dropdownValueComponent);
  
    return mountComponent(Component, {
      labels,
      labelFilterBasePath,
    });
  };
  
  describe('DropdownValueComponent', () => {
    let vm;
  
    beforeEach(() => {
      vm = createComponent();
    });
  
    afterEach(() => {
      vm.$destroy();
    });
  
    describe('computed', () => {
      describe('isEmpty', () => {
        it('returns true if `labels` prop is empty', () => {
          const vmEmptyLabels = createComponent([]);
          expect(vmEmptyLabels.isEmpty).toBe(true);
          vmEmptyLabels.$destroy();
        });
  
        it('returns false if `labels` prop is empty', () => {
          expect(vm.isEmpty).toBe(false);
        });
      });
    });
  
    describe('methods', () => {
      describe('labelFilterUrl', () => {
        it('returns URL string starting with labelFilterBasePath and encoded label.title', () => {
          expect(vm.labelFilterUrl({
            title: 'Foo bar',
          })).toBe('/gitlab-org/my-project/issues?label_name[]=Foo%20bar');
        });
      });
  
      describe('labelStyle', () => {
        it('returns object with `color` & `backgroundColor` properties from label.textColor & label.color', () => {
          const label = {
            textColor: '#FFFFFF',
            color: '#BADA55',
          };
          const styleObj = vm.labelStyle(label);
  
          expect(styleObj.color).toBe(label.textColor);
          expect(styleObj.backgroundColor).toBe(label.color);
        });
      });
    });
  
    describe('template', () => {
      it('renders component container element with classes `hide-collapsed value issuable-show-labels`', () => {
        expect(vm.$el.classList.contains('hide-collapsed', 'value', 'issuable-show-labels')).toBe(true);
      });
  
      it('render slot content inside component when `labels` prop is empty', () => {
        const vmEmptyLabels = createComponent([]);
        expect(vmEmptyLabels.$el.querySelector('.text-secondary').innerText.trim()).toBe(mockConfig.emptyValueText);
        vmEmptyLabels.$destroy();
      });
  
      it('renders label element with filter URL', () => {
        expect(vm.$el.querySelector('a').getAttribute('href')).toBe('/gitlab-org/my-project/issues?label_name[]=Foo%20Label');
      });
  
      it('renders label element with tooltip and styles based on label details', () => {
        const labelEl = vm.$el.querySelector('a span.label.color-label');
        expect(labelEl).not.toBeNull();
        expect(labelEl.dataset.placement).toBe('bottom');
        expect(labelEl.dataset.container).toBe('body');
        expect(labelEl.dataset.originalTitle).toBe(mockLabels[0].description);
        expect(labelEl.getAttribute('style')).toBe('background-color: rgb(186, 218, 85);');
        expect(labelEl.innerText.trim()).toBe(mockLabels[0].title);
      });
    });
  });
  