1 files changed, 108 insertions, 0 deletions
diff --git a/spec/frontend/search/components/dropdown_filter_spec.js b/spec/frontend/search/components/dropdown_filter_spec.js
new file mode 100644
index 00000000000..ffac038e1c5
--- /dev/null
+++ b/spec/frontend/search/components/dropdown_filter_spec.js
@@ -0,0 +1,108 @@
+import { shallowMount } from '@vue/test-utils';
+import { GlDropdown, GlDropdownItem } from '@gitlab/ui';
+import DropdownFilter from '~/search/components/dropdown_filter.vue';
+import {
+  FILTER_STATES,
+  FILTER_STATES_BY_SCOPE,
+  FILTER_HEADER,
+  SCOPES,
+} from '~/search/state_filter/constants';
+import * as urlUtils from '~/lib/utils/url_utility';
+
+jest.mock('~/lib/utils/url_utility', () => ({
+  visitUrl: jest.fn(),
+  setUrlParams: jest.fn(),
+}));
+
+function createComponent(props = { scope: 'issues' }) {
+  return shallowMount(DropdownFilter, {
+    propsData: {
+      filtersArray: FILTER_STATES_BY_SCOPE.issues,
+      filters: FILTER_STATES,
+      header: FILTER_HEADER,
+      param: 'state',
+      supportedScopes: Object.values(SCOPES),
+      ...props,
+    },
+  });
+}
+
+describe('DropdownFilter', () => {
+  let wrapper;
+
+  beforeEach(() => {
+    wrapper = createComponent();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  const findGlDropdown = () => wrapper.find(GlDropdown);
+  const findGlDropdownItems = () => findGlDropdown().findAll(GlDropdownItem);
+  const findDropdownItemsText = () => findGlDropdownItems().wrappers.map(w => w.text());
+  const firstDropDownItem = () => findGlDropdownItems().at(0);
+
+  describe('template', () => {
+    describe.each`
+      scope               | showDropdown
+      ${'issues'}         | ${true}
+      ${'merge_requests'} | ${true}
+      ${'projects'}       | ${false}
+      ${'milestones'}     | ${false}
+      ${'users'}          | ${false}
+      ${'notes'}          | ${false}
+      ${'wiki_blobs'}     | ${false}
+      ${'blobs'}          | ${false}
+    `(`dropdown`, ({ scope, showDropdown }) => {
+      beforeEach(() => {
+        wrapper = createComponent({ scope });
+      });
+
+      it(`does${showDropdown ? '' : ' not'} render when scope is ${scope}`, () => {
+        expect(findGlDropdown().exists()).toBe(showDropdown);
+      });
+    });
+
+    describe.each`
+      initialFilter                 | label
+      ${FILTER_STATES.ANY.value}    | ${`Any ${FILTER_HEADER}`}
+      ${FILTER_STATES.OPEN.value}   | ${FILTER_STATES.OPEN.label}
+      ${FILTER_STATES.CLOSED.value} | ${FILTER_STATES.CLOSED.label}
+    `(`filter text`, ({ initialFilter, label }) => {
+      describe(`when initialFilter is ${initialFilter}`, () => {
+        beforeEach(() => {
+          wrapper = createComponent({ scope: 'issues', initialFilter });
+        });
+
+        it(`sets dropdown label to ${label}`, () => {
+          expect(findGlDropdown().attributes('text')).toBe(label);
+        });
+      });
+    });
+
+    describe('Filter options', () => {
+      it('renders a dropdown item for each filterOption', () => {
+        expect(findDropdownItemsText()).toStrictEqual(
+          FILTER_STATES_BY_SCOPE[SCOPES.ISSUES].map(v => {
+            return v.label;
+          }),
+        );
+      });
+
+      it('clicking a dropdown item calls setUrlParams', () => {
+        const state = FILTER_STATES[Object.keys(FILTER_STATES)[0]].value;
+        firstDropDownItem().vm.$emit('click');
+
+        expect(urlUtils.setUrlParams).toHaveBeenCalledWith({ state });
+      });
+
+      it('clicking a dropdown item calls visitUrl', () => {
+        firstDropDownItem().vm.$emit('click');
+
+        expect(urlUtils.visitUrl).toHaveBeenCalled();
+      });
+    });
+  });
+});